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Cover and Content of Chemical Journal of Chinese Universities Vol.47 No.1(2026) Chem. J. Chinese Universities    2026, 47 (1): 1-6.   Abstract （2126）      PDF（pc） （26559KB）（182）       Knowledge map    Save Related Articles | Metrics

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Cover and Content of Chemical Journal of Chinese Universities Vol.46 No.10(2025) Chem. J. Chinese Universities    2025, 46 (10): 1-4.   Abstract （1184）      PDF（pc） （15752KB）（241）       Knowledge map    Save Related Articles | Metrics

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Electrochemical Removal of PFAS by Boron-doped Diamond Electrode ZHANG Senchong, LYU Jitao, WANG Sen, LYU Jilei, WANG Shaolong, WANG Yawei Chem. J. Chinese Universities    2025, 46 (8): 20250096-.   DOI: 10.7503/cjcu20250096 Abstract （999）   HTML （9）    PDF（pc） （5983KB）（158）       Knowledge map    Save In this study， six boron-doped diamond（Nb/BDD） electrodes with different boron doping levels were prepared using niobium flakes as the substrate by microwave plasma chemical vapor deposition， and the effects of different boron doping levels on the electrochemical performance of Nb/BDD electrodes and their oxidation of perfluorooctanoic acid（PFOA） were investigated and applied to the electrochemical removal of different perfluorosulfonic acids（PFASs）. The results showed that with the increase of boron doping level， the grain size of the Nb/BDD film gradually decreased and the electron transfer rate on the electrode surface gradually increased， but the decrease of film quality leads to the increase of its exfoliation rate. Na2SO4 was used as the electrolyte， and the Nb/BDD electrode as the anode was able to oxidize PFOA within 120 min at a current density of 30 mA/cm2. PFOA degradation rate to 78.3% and mineralization rate to 78.1% within 240 min. Among the six Nb/BDD electrodes prepared with different boron doping levels， the medium and low-doped Nb/BDD electrodes have higher degradation and mineralization ability for PFOA， indicating that the efficient electrochemical removal of PFAS can be achieved by regulating the boron doping level of BDD. The analysis of the degradation products indicated that the electrochemical degradation of PFOA follows the law of carbon chain step-by-step removal， in which the direct electron transfer between the anode and the pollutant is the key initiation step of degradation. The electrochemical degradation of PFSA and perfluorocarboxylic acid（PFCA） with different chain lengths reveals that the length of the carbon chain is positively proportional with the degradation rate and mineralization rate of PFAS， and thus the short-chain products generated by the degradation are the main reason for limiting the complete mineralization of PFAS. In the future， more attention needs to be paid to the efficient removal of short-chain and ultrashort-chain PFAS in order to meet the demand for the complete detoxification of PFAS through electrochemical technologies. Table and Figures | Reference | Related Articles | Metrics

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D-A Type Covalent Organic Framework Nanorods for Visible Light Catalyzed Benzylamine Coupling Reaction ZHANG Xiaohui, ZHAO Dongdong, ZHANG Junjie, ZHUANG Jinliang Chem. J. Chinese Universities    2025, 46 (7): 20250020-.   DOI: 10.7503/cjcu20250020 Abstract （876）   HTML （19）    PDF（pc） （8322KB）（242）       Knowledge map    Save Covalent organic frameworks（COFs） are a new type of covalently bonded crystalline materials with predictable structures and permanent porosity. COFs have found extensive applications in heterogeneous catalysts. In this study， organic monomers containing photoactive pyrene groups（TFPPy） and benzothiadiazole（BTz） were used as building units for the construction of COFs. The donor-acceptor（D-A） type TFPPy-BTz-COF nanorods photocatalysts were successfully synthesized via a solvent-thermal method. The morphology， structure， and composition of TFPPy-BTz-COF were characterized by scanning electron microscopy（SEM）， high-resolution transmission electron microscopy（HRTEM）， X-ray diffraction（XRD）， UV-Vis diffuse reflectance spectroscopy（UV-Vis DRS）， Fourier-transform infrared（FTIR） spectroscopy， and N2 adsorption-desorption measurements. The as-synthesized TFPPy-BTz-COF nanorods exhibit a rod-like morphology with a high degree of crystallinity， a specific surface area（BET） of 118.86 m²/g， and a band gap（Eg） of 2.30 eV. Benefiting from their efficient photogenerated photo-electron pair ability， the TFPPy-BTz-COF nanorods enable the coupling reaction of various amines with high efficiency and selectivity under conditions of room temperature， oxygen atmosphere， and visible light irradiation. Electron paramagnetic resonance spectroscopy（EPR） and active species trapping experiments suggested that the singlet oxygen （1O2） and superoxide radical（{\mathrm{O}}_{\mathrm{2}}^{\bullet -}） are key intermediates， and a catalytic mechanism for the visible light mediated photocatalytic oxidation coupling of benzylamines catalyzed by TFPPy-BTz-COF was proposed. Table and Figures | Reference | Related Articles | Metrics

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Robust， Self-healing Polyurethane Hydrogel Enabled by Dual Crosslinking of Dynamic Disulfide and Hydrogen Bonds YANG Bing, DING Xia, XU Jun, LI Ye, GU Rui, ZHANG Hui, HOU Zhaosheng Chem. J. Chinese Universities    2025, 46 (9): 20250098-.   DOI: 10.7503/cjcu20250098 Abstract （831）   HTML （8）    PDF（pc） （8252KB）（186）       Knowledge map    Save This study developed a new kind of self-healing polyurethane hydrogels（SPUGs） through a synergistic crosslinking strategy combining dynamic covalent disulfide bonds and non-covalent hydrogen bonds. A specifically synthesized quadrifunctional crosslinker， 3，3'-disulfanediylbis（propane-1，2-diol）， was employed to react with poly（ethylene glycol）-based polyurethane prepolymers， followed by solvent-exchange method to produce SPUGs. The physicochemical properties of SPUGs and lyophilized gels（DSPUGs） were characterized comprehensively， and the results revealed that the dual-crosslinked systems exhibited enhanced thermal stability［temperature at 5% mass loss（T5%）>250 ℃］ and low glass transition temperature（Tg<0 ℃）. With the increase of disulfide bond content， the surface hydrophilicity and equilibrium swelling ratio of SPUGs reduced， while water-retaining capacity increased. Mechanical tests demonstrated that SPUGs exhibited elastic deformation and possessed outstanding tensile properties， compressive toughness and fatigue-resistant capacities. SPUG-II with a moderate crosslinking density achieved a maximum tensile strength of 112.2 kPa， elongation at break of 459.4% and fracture toughness of 267.6 kJ/m3. The double dynamic bonds endowed SPUGs with high self-healing efficiency（≥90% at 50 ℃ for 2 h） and redox-triggered reversible gel-sol transitions. Methyl thiazolyl tetrazolium（MTT） assays confirmed favorable cytocompatibility with cell survival rate exceeding 80% after 72 h incubation. The SPUG hydrogels with superior mechanical properties， reversible gel-sol transitions， high self-healing capability， and good biocompatibility indicated promising prospects in biomedical applications. Table and Figures | Reference | Supplementary Material | Related Articles | Metrics

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Enhancing Methanol Oxidation Reaction by NiO Featuring High Concentration of Oxygen Vacancy and Ni3+/Ni2+ Ratio LU Jiantian, ZHAO Manzhen, ZHANG Baohua, SONG Shuang, ZHANG Yuwei Chem. J. Chinese Universities    2025, 46 (7): 20250073-.   DOI: 10.7503/cjcu20250073 Abstract （793）   HTML （6）    PDF（pc） （4733KB）（96）       Knowledge map    Save To address the critical challenges of insufficient active sites， poor conductivity， and sluggish reaction kinetics in nickel-based electrocatalysts for methanol oxidation reaction（MOR）， this study proposes a lattice doping engineering strategy. By employing a low-cost ammonium molybdate precursor coupled with a calcination process， we successfully constructed Mo-doped NiO catalysts synergistically enhanced by oxygen vacancies and Ni³⁺ active sites. Experimental results demonstrate that as the Mo doping level increases from 0 to 28%（atomic fraction）， the oxygen vacancy concentration on the catalyst surface escalates progressively from 30.18% to 56.59%， while the proportion of Ni3+ species rises from 65.55% to 85.91%. At an optimal Mo doping content of 28%， the catalyst achieves a current density of 280.8 mA/cm² at 1.7 V（vs. RHE） in 1.0 mol/L KOH/1.0 mol/L CH3OH electrolyte， representing a 12.9-fold enhancement compared to undoped NiO（21.7 mA/cm2）. Furthermore， the Tafel slope decreases signifi-cantly from 63 mV/dec to 25 mV/dec. Systematic characterizations via XRD， SEM， TEM and XPS elucidate the formation mechanism of Mo-doped NiO catalysts with tunable oxygen vacancy concentrations and Ni³⁺/Ni²⁺ ratios， as well as their MOR electrocatalytic performance. A preliminary structure-activity relationship is established， revealing the underlying principles of enhanced activity. This work provides a novel approach for designing efficient anode catalysts for direct methanol fuel cells（DMFCs） with high active site density. Table and Figures | Reference | Supplementary Material | Related Articles | Metrics

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Synthesis of the PtxZn/MSN Catalysts and Their Propane Dehydrogenation Properties WANG Wenxin, SHAN Yiou, SONG Jiaxin, FAN Xiaoqiang, YU Xuehua, KONG Lian, XIAO Xia, XIE Zean, ZHAO Zhen Chem. J. Chinese Universities    2025, 46 (7): 20250011-.   DOI: 10.7503/cjcu20250011 Abstract （763）   HTML （14）    PDF（pc） （4703KB）（119）       Knowledge map    Save With the increasing demand of propylene in society， the development of efficient propylene production technology is crucial for both science and the economy. Platinum-based catalysts have been widely studied in propane dehydrogenation（PDH） reactions due to their high ability to activate propane C—H bonds and selectivity towards propylene. In this work， mesoporous silica nanoparticles（MSN） with confinement effect were used as the support， and transition metal zinc was selected as a promoter to control the electronic properties and geometric structure of platinum. PtxZn/MSN catalysts with different zinc loadings were prepared by the impregnation method and the products were characterized by X-Ray diffraction（XRD）， N2 adsorption-desorption， Raman spectra， CO diffuse reflective infrared Fourier transform spectroscopy（CO-DRIFT）， scanning electron microscope（SEM）， transmission electron microscope（TEM） and X-ray photoelectron specroscopy（XPS）. the PDH performance of PtxZn/MSN was tested. When the zinc loading was 0.5%（mass fraction）， PtxZn/MSN catalyst showed the highest PDH activity with the initial propane conversion and propylene selectivity of 47.9% and 97.0%， respectively. After 6 h reaction， the propane conversion and propylene selectivity were 45.8% and 97.0%， with the propylene production rate of 0.82 mmol/min·gcat. The characterization results demonstrated that the addition of Zn divided Pt particles into smaller Pt species， which can improve the dispersion of Pt， reduce the occurrence of side reactions， and enhance the stability of the catalyst. Table and Figures | Reference | Related Articles | Metrics

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Aggregation Induced Emission Enhancement of Ligand-Engineered Au Nanoclusters YE Weiqing, LU Hui, CHEN Wanjing, LI Ningjing, ZHANG Yu, WANG Lihua, LI Jiang, ZHU Ying, LI Mingqiang, FAN Chunhai, JIA Sisi, CHEN Jing Chem. J. Chinese Universities    2025, 46 (8): 20250100-.   DOI: 10.7503/cjcu20250100 Abstract （762）   HTML （27）    PDF（pc） （5882KB）（246）       Knowledge map    Save The aggregation-induced emission（AIE） properties of gold nanoclusters（Au NCs） exhibit significant potential for applications in bioimaging， chemical sensing， and optoelectronic devices. However， developing effective design strategies to achieve strong aggregation-induced emission enhancement（AIEE） in Au NCs remains a challenge. In this paper， we report a ligand engineering approach to achieve remarkable AIE enhancement in Au8 nanoclusters. The quantum yield of aggregated Au8 NCs showed a ca. 90-fold increase compared to their solution state， with corresponding emission intensity enhancement reaching ca. 560-fold. Through combined optical characterization and metastable component tracking in aggregated systems， we elucidate the underlying AIEE mechanism. Both AIEE and crystallization-induced emission enhancement（CIEE） were activated through ligand engineering， which facilitated （1） shortened inter-cluster distances（from 1.31 nm to 0.72 nm） and （2） effective suppression of intermolecular rotational/vibrational relaxation. This steric-hindrance-reduction strategy establishes a new paradigm for precise modulation of photoluminescence in gold nanoclusters across both aggregated and crystalline states. Table and Figures | Reference | Supplementary Material | Related Articles | Metrics

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Recycling Treatment of Unsymmetrical Dimethylhydrazine High-salinity Wastewater via "Electrodialysis+Reverse Osmosis" Double Membrane Processes XUE Linyong, ZHU Helin, ZHANG Nian, WU Yannan, YANG Zhenmiao, WEI Chenjie, LIU Lifen Chem. J. Chinese Universities    2025, 46 (7): 20250039-.   DOI: 10.7503/cjcu20250039 Abstract （707）   HTML （6）    PDF（pc） （2279KB）（62）       Knowledge map    Save Unsymmetrical dimethylhydrazine（UDMH） is the main fuel for missile， satellite and spacecraft launch tests as well as carrier rockets. Its production wastewater contains high concentrations of salt， alkali and UDMH. Direct discharge of the UDMH wastewater can cause water and soil pollution， seriously endangering human health. Therefore， this paper designed a kind of “electrodialysis+reverse osmosis” double membrane processes for recycling treatment of the high salinity UDMH wastewater. Firstly， the electrodialysis（ED） was used to remove the impunities of salt and base in the wastewater， and then the reverse osmosis（RO） was carried out to further concentrate the desalinated wastewater for the highly purified recovery of UDMH. Meanwhile， the influences of ion exchange membrane， operating voltage and feed liquid flow rate on desalination process of ED were investigated， and the concentration technique of reverse osmosis process was also optimized. The research results showed that the electrodialysis process can remove 98.6% of NaCl and base（NaOH， ect.）， the loss rate of UDMH is less than 13.5%， the current efficiency can reach 53.1%， and the process energy consumption is about 1.02 kW·h/kg. The concentration of UDMH is concentrated from 1.1 g/L to 6.3 g/L， and the concentration ratio of UDMH is about 5.6 times， which meets the reuse requirement of UDMH. Table and Figures | Reference | Supplementary Material | Related Articles | Metrics

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Electrolytes Design and Electrochemical Performance for Lithium Metal Batteries Based on Fluorosiloxane Solvents LIANG Yi, HUANG Dequan, YIN Guangda, WEN Gang, QIN Weixian, YAO Yuan, WEI Tao Chem. J. Chinese Universities    2025, 46 (7): 20250024-.   DOI: 10.7503/cjcu20250024 Abstract （705）   HTML （18）    PDF（pc） （8161KB）（309）       Knowledge map    Save Addressing the issues of lithium dendrite growth， unstable electrode/electrolyte interface， and poor oxidation stability in ethylene glycol dimethyl ether（DME） electrolyte in lithium metal batteries， this work uses trimethoxy（3，3，3-trifluoropropyl） silane（TFS） as the electrolyte solvent and combines with lithium difluorosulfonylimide（LiFSI） salt to design a novel fluorinated siloxane electrolyte. The lithium solvation structure of the electrolyte were analyzed by density functional theory（DFT） and molecular dynamics simulations（MD）. The electrochemical performance of the cells in fluorinated siloxane electrolyte and DME electrolyte were compared and analyzed through charge discharge tests， cycle performance tests， and rate performance tests. The lithium deposition morphology and electrode interface composition were analyzed by scanning electron microscopy（SEM） and X-ray photoelectron spectroscopy（XPS）. As a result， the Si—O bond in TFS has a higher bond energy than the C—O bond in DME electrolyte， which can enhance the oxidation stability of the electrolyte and match high-voltage cathode materials. In addition， TFS solvent exhibits relatively weak binding ability with Li+， and this unique lithium solvation structure is conductive to inducing preferentially decompose of FSI‒ anions on the surface of lithium metal anode and forming LiF-rich solid electrolyte interphase（SEI） films， effectively inhibiting lithium dendrite growth， stabilizing the electrode interface， and improving the cycle life of lithium metal batteries. In TFS electrolyte， the Li 􀰙􀰙 Cu cell can be stably cycled for 300 cycles at a current density of 1.0 mA/cm2， the Li 􀰙􀰙 LFP full cell shows no significant capacity degradation after 400 cycles at a rate of 2.0C， and the Li 􀰙􀰙 CNCM811 full cell maintains a discharge specific capacity retention rate of 83% after 300 cycles at a rate of 1.0C， demonstrating excellent cycling stability. Table and Figures | Reference | Related Articles | Metrics

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Extending the Polarizable Bond-dipole Model to Enable the Rapid Prediction of the Conformational Stability of Cyclic Peptides ZHENG Xiaohan, ZHU Jiayi, LI Xiaolei, HAO Qiang, WANG Changsheng Chem. J. Chinese Universities    2025, 46 (10): 20250173-.   DOI: 10.7503/cjcu20250173 Abstract （697）   HTML （7）    PDF（pc） （2901KB）（68）       Knowledge map    Save Cyclic peptides possess unique conformational stability， diverse biological activities， and favorable target specificity， making them important lead compounds in drug development. Rapid and accurate prediction of their conformational stability not only aids in uncovering the molecular mechanisms of protein misfolding， but also provides a theoretical basis for target identification and intervention. This is of great significance for the rational design of structurally stable and highly active cyclic peptide-based drugs. In this paper， the polar chemical bonds C=O， N—H， C α —H and C—O， O—H in cyclic peptides are regarded as bond dipoles. The permanent dipole- permanent dipole interaction is used to describe the electrostatic interaction in the system， and the permanent dipole-induce dipole interaction and induce dipole-induced dipole interaction are used to describe the polarization. The bonded terms， including the bond-stretching， angle-bending， and dihedral torsion， are also introduced. The polarizable dipole-dipole interaction model is thus developed into a potential function that can be used to rapidly calculate the relative energies of different conformations of cyclic peptides. The potential function is applied to 9 cyclic peptides， total 33 different conformations to rapidly predict the conformational energies of these conformations. The conformational energies of these conformations are also calculated using the AMOEBA and DLPNO-MP2/aug-cc-pVTZ methods. The calculation results show that， compared with the DLPNO-MP2/aug- cc-pVTZ conformational energies， the linear correlation coefficient R2 of our model is 0.9784， and the root mean square deviation is 13.43 kJ/mol， slightly better than the linear correlation coefficient 0.9682 and root mean square deviation 16.28 kJ/mol of the AMOEBA method. The results of structural optimization and frequency calculation further suggest the rationality of our model. Furthermore， compared with the AMOEBA polarizable force field， our polarizable model significantly reduces the number of electrostatic terms. The model proposed in this paper may provide a new tool for the research and development of novel cyclic peptides as drug candidate molecules. Table and Figures | Reference | Supplementary Material | Related Articles | Metrics

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Effects of Surface Modification Strategies of Spherical Silica Particles on Properties of Epoxy Resin Composites for Electronic Packaging ZHANG Lili, HU Haijun, LI Houwen, NIE Xingcheng, LI Bin, ZHANG Hailin, HU Qiaoju, ZHENG Dezhou, ZHANG Gouqing, JING Jinfeng, LIU Wenxing, GAO Changyou Chem. J. Chinese Universities    2025, 46 (10): 20250145-.   DOI: 10.7503/cjcu20250145 Abstract （688）   HTML （10）    PDF（pc） （6810KB）（459）       Knowledge map    Save The effect of silane coupling agent（SCA） interfacial modification on the properties of silica particles/ epoxy composites was systematically investigated to address the performance bottlenecks of epoxy resin-based electronic packaging materials in terms of high thermal conductivity， low dielectric loss， and moisture and thermal stability. The successful grafting of silane coupling agents onto the silica particle surface was verified by surface energy spectroscopy analysis， and epoxy resin-based packaging films with high filler content（50%， mass fraction） were prepared to compare the overall performance of the composites before and after modification. The incorporation of γ-glycidyloxypropyltrimethoxysilane（KH-560） enhanced the interfacial bonding strength of resin through the participation of epoxy groups in the cross-linking reaction. The resultant composites exhibited an optimal glass transition temperature of 170.38 ℃， a thermal conductivity of 0.15 W/mK， and a tensile strength of 102.79 MPa. The resin prepared by using N-phenyl-3-aminopropyltrimethoxysilane（KBM-573）-modified silica particles exhibited a water contact angle of 114.9° and slightly lower mechanical properties due to the hydrophobicity of the benzene ring and conjugation effect. The γ-aminopropyltrimethoxysilane（KH-540）-modified system demonstrated limited improvement in dielectric properties and hydrophobicity due to the amine polarity. The present study elucidated the synergistic effect of modified silica particles on the mechanical， thermal， and electrical properties. This finding provides a theoretical basis for the targeted optimization of electronic packaging materials. Table and Figures | Reference | Related Articles | Metrics

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Analysis of High Value Methane Conversion Pathways in the Context of Carbon Neutrality LAI Lina, BAO Yunxin, WANG Yiming, FAN Jie Chem. J. Chinese Universities    2025, 46 (9): 20250122-.   DOI: 10.7503/cjcu20250122 Abstract （678）   HTML （17）    PDF（pc） （4178KB）（218）       Knowledge map    Save As a pivotal chemical feedstock， methane is characterized by its abundant reserves， cost-effectiveness， and renewability. In the context of global carbon neutrality and net-zero emission initiatives， developing high-value conversion pathways for methane， such as hydrogen production， methanol synthesis， olefin/aromatic generation， and clean fuel manufacturing， has emerged as a strategic approach to maximize its utilization potential. Significant research efforts have been directed toward establishing energy-efficient and economically viable conversion systems to maximize the utilization efficiency of its carbon and hydrogen atoms. This review systematically examines recent advancements in methane conversion technologies for high-value chemical synthesis， and conducts a statistical analysis of relevant literature and patents on different conversion pathways based on thermal catalysis. With these foundational assessments， the future challenges and prospects of methane conversion are prospected. Table and Figures | Reference | Related Articles | Metrics

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Synthesis and Near-infrared Reflective Properties of Rare-earth-doped Bi2－x Gd x MoO6 YAN Junlin, LI Xiaodong, LIU Dongyang, LI Mingzhe, ZHANG Su Chem. J. Chinese Universities    2025, 46 (9): 20250088-.   DOI: 10.7503/cjcu20250088 Abstract （672）   HTML （12）    PDF（pc） （7683KB）（1159）       Knowledge map    Save In response to the escalating challenges of global climate change and urban heat island effects， the development of energy-efficient functional materials with high near-infrared（NIR） reflectance and effective thermal regulation capabilities has become a research focus. Traditional oxide materials， such as Bi2MoO6， still exhibit certain limitations in NIR reflectance. In recent years， rare-earth-modified molybdate materials have attracted significant attention in the field of NIR-reflective coatings due to their excellent optical response characteristics and structural stability. In this study， Gd3+-doped Bi2－x Gd x MoO6（x=0， 0.2， 0.4， 0.6， 0.8， 1.0） NIR reflective materials were synthesized via a solid-state reaction method. The obtained samples were systematically characterized by X-ray diffraction（XRD）， scanning electron microscopy（SEM）， energy-dispersive spectroscopy（EDS）， Fourier transform infrared spectroscopy（FTIR）， Raman spectroscopy， near-infrared（NIR） reflectance spectroscopy， thermogravimetric-differential scanning calorimetry（TG-DSC） and thermal insulation performance tests. The results indicated that the synthesized samples exhibited good crystallinity. Gd3+ doping induced a bandgap narrowing （from 2.87 eV to 2.80 eV）， leading to a redshift of the absorption edge and enhanced absorption in the 450—600 nm blue-green region， resulting in a more pronounced yellow hue and enabling effective color modulation. All Bi2－x Gd x MoO6 samples exhibited high NIR reflectance， with values exceeding 87.68%， significantly higher than that of TiO2（75.66%）. In particular， the sample with x=0.4 demonstrated the highest NIR reflectance of 90.11% and a NIR solar reflectance of 89.53%， which are 14.45% and 9.24% higher than those of TiO2， respectively. Infrared lamp irradiation experiments further confirmed the superior energy-saving and thermal insulation performance of the materials. TG-DSC analysis revealed that Bi2－x Gd x MoO6 pigments possess excellent thermal stability， allowing for long-term application in high-temperature environments. These findings offer a new and promising alternative for high-performance thermal insulation materials. Table and Figures | Reference | Related Articles | Metrics

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A Novel Anthracene-based Two-dimensional Covalent Organic Framework Nanosheet for Rapid Singlet Oxygen Capture and Controllable Release AN Jing, MIAO Bo, ZHAO Tongyi, SONG Jialong, ZHANG Wenyu, YUAN Bizhen, LIU Yaozu, ZHONG Tian, FANG Qianrong Chem. J. Chinese Universities    2025, 46 (12): 20250117-.   DOI: 10.7503/cjcu20250117 Abstract （617）   HTML （78）    PDF（pc） （4477KB）（295）       Knowledge map    Save Singlet oxygen（¹O₂） is a highly reactive species with strong oxidizing properties， making it valuable in various applications， including photodynamic therapy， organic synthesis and material science. However， its short lifetime and high reactivity present significant challenges in its practical use. To overcome these challenges， the development of efficient materials for ¹O₂ capture and controlled release has attracted considerable attention. Covalent organic frameworks（COFs）， with their unique crystalline structure， high porosity and exceptional stability， have emerged as ideal candidates for ¹O₂ storage and transfer. In this study， we designed and synthesized a two-dimensional anthracene-based COF（2D An COF）， which was further exfoliated into nanosheet（2D An COF-nanosheet） to enhance its performance. Fluorescence spectroscopy analysis demonstrated that the 2D An COF-nanosheet exhibited a significantly higher ¹O₂ capture rate compared to the bulk COF， which can be attributed to their more exposed active sites. Both the 2D An COF and its exfoliated nanosheet showed excellent reversibility in ¹O₂ release when exposed to external thermal or light stimuli， with no significant degradation in performance after multiple cycles. The results highlight the potential of 2D COF materials， particularly in nanosheet form， as efficient and stable platforms for ¹O₂ storage and release. This work provides new theoretical insights into the design of ¹O₂-responsive materials and opens new avenues for applications in photodynamic therapy， photocatalysis and other fields requiring precise control over reactive oxygen species. Table and Figures | Reference | Related Articles | Metrics

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Construction of Thermosensitive Drug Controlled Release System for Highly Efficient Chemo-photothermal Tumor Therapy LIANG Jianing, FU Kaiqi, ZHOU Rui, YE Lili, WANG Li, LIU Zhaomin, SUN Lin, DONG Yan Chem. J. Chinese Universities    2025, 46 (9): 20250068-.   DOI: 10.7503/cjcu20250068 Abstract （599）   HTML （14）    PDF（pc） （20562KB）（127）       Knowledge map    Save Combination of chemotherapy and photothermal therapy can cover the entire tumor area， achieving an effective synergistic treatment performance. In this study， covalent organic frameworks（COFs） with unique pore structure and excellent chemical stability were utilized as the shell， and Fe3O4 nanoparticles with favorable photothermal properties were adopted as the core to construction a core-shell structured drug carrier with a particle size of approximately 200 nm. The antitumor drug doxorubicin hydrochloride（DOX） was encapsulated into the pores of COFs. Subsequently， the composite material was modified with the thermosensitive material， poly（N- isopropylacrylamide）（PNIPAM）， which was used to seal the surface of the composite. Furthermore， under irradiation with 808 nm laser， Fe3O4 nanoparticles rapidly converted light energy into heat energy， thereby generating a temperature change that achieve two purposes， on the one hand， the temperature change reached the lower critical solution temperature of PNIPAM for phase transition， causing the structure contracts inward and thus achieving the controlled release of drug molecules. On the other hand， the high temperature could kill cancer cells effectively， thus exhibited chemo-photothermal tumor therapy performance. Finally， carbon dots were grafted on the surface of the system to achieve the folic acid-mediated target controlled release mechanism， and a temperature-sensitive drug controlled release system was constructed successfully. The system exhibited highly antitumor performance by combining with chemotherapy and photothermal therapy. Table and Figures | Reference | Related Articles | Metrics

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Determination of Acidic Ionic Liquid H0 and the Effect of Salt Effect WANG Zhiyuan, DONG Yi, QI Baohui, WEI Xueyang, ZHANG Jiahui, HUANG Qizhong, LI Jisheng, GAO Na, DI Shiying, HU Yufeng Chem. J. Chinese Universities    2025, 46 (7): 20240535-.   DOI: 10.7503/cjcu20240535 Abstract （597）   HTML （10）    PDF（pc） （1200KB）（333）       Knowledge map    Save The catalytic activity of ionic liquids is closely related to their acidity， and the Hammett acidity function （H0） is one of the most important parameters to represent acidity. In this paper， we synthesized a series of pyrrolidinone-based and imidazolium-based ionic liquids that can be used in the synthesis process of 1，3，5-trioxane， and conducted systematic experimental and theoretical studies on their H0 in aqueous solution. The influence of anionic and cationic structures and solvent selection on acidity were compared. The effect of salt effect on the H0 determination of 1-propylsulfonic-3-methylimidazolium methanesulfonate（［C3SMIM］［MSA］）， methanesulfonic acid， trifluoromethanesulfonic acid， and sulfuric acid was studied. The results indicate that anions have a more significant impact on acidity. When the anions are the same， the longer the carbon chain of the cation substituent is， the stronger the acidity will be； When the cations are the same， the lower the charge density of the anions is， the stronger the acidity will be； For the same type of ionic liquid， ionic liquids functionalized with sulfonic acid have stronger acidity than those that are not functionalized. Most salts have a salting out effect， which enhances acidity， while a few salts weaken acidity， such as sodium p-toluenesulfonate and 1-propylsulfonic-3-methylimidazolium salt（C3SMIM）. The common characteristics of these salts are large ion size and low charge density. Table and Figures | Reference | Related Articles | Metrics

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Fluorescent Detection of Sulfite Ions（SO23 -） Based on Cerium-functionalized Metal-organic Framework UiO-66-（COOH）2 GONG Wenpeng, ZHOU Linnan Chem. J. Chinese Universities    2025, 46 (7): 20250062-.   DOI: 10.7503/cjcu20250062 Abstract （578）   HTML （7）    PDF（pc） （3980KB）（138）       Knowledge map    Save A fluorescence strategy was constructed based on the metallic organic framework Ce-UIO-66-（COOH）2 to detect SO{}_{\mathrm{3}}^{\mathrm{2}}-. Firstly， under solvothermal conditions， the Ce-UIO-66-（COOH）2 was synthesized using homophthallic acid and Ce4+ as the organic ligand and central ion. The structure was characterized by X-ray diffraction（XRD）， infrared spectroscopy（IR）， X-ray photoelectron spectroscopy（XPS）， scanning electron microscope（SEM） and energy dispersive spectroscopy（EDS）. Employing a reaction system using Ce-UIO-66-（COOH）2， SO{}_{\mathrm{3}}^{\mathrm{2}}- and benzoic acid， under the catalysis of Ce-UiO-66-（COOH）2， the SO{}_{\mathrm{3}}^{\mathrm{2}}- was conversed to sulfate radical SO{}_{\mathrm{4}}^{·}-， and then induced benzoic acid to transform into fluorescent molecule 2-hydroxybenzoic acid（salicylic acid）， which realizes the detection of SO{}_{\mathrm{3}}^{\mathrm{2}}-. The detection mechanism was confirmed by fluorescence spectrum and ESR. The influences of time， temperature， dosages of MOF and benzoic acid were explored. Under the optimal conditions， a linear detection range was obtained as 40—120 μmol/L， and the detection limit was 8.3 μmol/L. The method possesses the favourable anti-interference property for common inorganic anions. Meanwhile， it was applied to the determination of SO{}_{\mathrm{3}}^{\mathrm{2}}- in rainwater and tap water samples， the results are satisfactory. Table and Figures | Reference | Related Articles | Metrics

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Preparation of Hyperbranched Poly（ethylene glycol）s via Reversible Addition-fragmentation Chain Transfer Free Radical Polymerization of Multivinyl Monomers and Their Application in Stem Cell Culture LI Zhili, ZHOU Dezhong Chem. J. Chinese Universities    2025, 46 (7): 20240546-.   DOI: 10.7503/cjcu20240546 Abstract （560）   HTML （10）    PDF（pc） （5479KB）（107）       Knowledge map    Save Using poly（ethylene glycol） diacrylate（PEGDA） as the multivinyl monomers（MVMs）， 4-cyano-4-（phenylcarbonothioylthio）pentanoic acid（CPADB） as the chain transfer agent， and 2，2'-azobisisobutyronitrile（AIBN） as the initiator， two hyperbranched poly（ethylene glycol）s（HBPs） with different branching degrees and multiple pendent vinyl groups were successfully prepared in a one-pot reversible addition-fragmentation chain transfer（RAFT） polymerization by regulating reaction parameters to specifically promote intermolecular combination. HBPs can react with thiolated gelatin（gel-SH） via thiol-ene click chemistry to form HBP/gel-SH hydrogels and be used for the culture of human induced mesenchymal stem cells（iMSCs）. The chemical composition and structure of the HBPs were characterized using gel permeation chromatography（GPC） and nuclear magnetic resonance spectrometry. Research results indicated that the branching degrees of HBPs can be effectively regulated by adjusting PEGDA monomer reaction concentration and n（PEGDA）∶n（CPADB）∶n（AIBN）. Rheological analysis showed that HBPs and gel-SH could cross-link to form a hydrogel within 2 min. Cell culture experiments demonstrated that the HBP/gel-SH hydrogels exhibited no significant cytotoxicity， and the hydrogel formed by the higher branching polymer displayed better biocompatibility. These hydrogels hold great potential for applications in stem cell culture and expansion. Table and Figures | Reference | Supplementary Material | Related Articles | Metrics

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Visible-light Photocatalytic Silylacylation of Alkenes JI Baobao, WANG Zhixiang, LIU Yan, CAO Jia Chem. J. Chinese Universities    2025, 46 (10): 20250202-.   DOI: 10.7503/cjcu20250202 Abstract （555）   HTML （21）    PDF（pc） （4119KB）（161）       Knowledge map    Save Carbonyl compounds are prevalent in bioactive molecules and organic functional materials， with ketones being particularly important structural motifs. This work focuses on the development of a visible-light photocatalytic three-component difunctionalization of alkenes using silylborates and acyl ammonium salts to access ketone derivatives. Control experiments and DFT calculations revealed that reaction proceeds via a single-electron transfer cascade process between a base/silylboronate complex and an acyl ammonium salt， triggered by a photocatalyst， generating silyl radicals and acyl radical anions. Subsequent sequential coupling with alkenes affords β-silyl ketones. This method features excellent functional group tolerance， mild reaction conditions， and broad substrate scope. Table and Figures | Reference | Supplementary Material | Related Articles | Metrics