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Recent Advances in Carbon Dots with Near-infrared Absorption/Emission LIU Yupeng, YANG Junxiang, HAO Yiming, QU Songnan Chem. J. Chinese Universities    2025, 46 (6): 20240070-.   DOI: 10.7503/cjcu20240070 Abstract （1090）   HTML （25）    PDF（pc） （30102KB）（301）       Knowledge map    Save Carbon dots（CDs） are an emerging class of zero-dimensional carbon nano-optical materials that are as promising candidates for various applications. Compared with visible light， near-infrared light has deeper tissue penetration and lower scattering， giving it obvious advantages in fields such as biological imaging. Through the exploration of scientific researchers， the optical band gap of CDs has been continuously regulated and red-shifted from the initial blue-violet light to longer wavelengths. In recent years， CDs with near-infrared absorption/emission have been gradually reported. Based on a series of works by our research group on the near-infrared carbon dots， this review summarizes and reviews the latest progress in preparation strategies and applications of near-infrared carbon dots， and prospectively outlines the future development directions. Table and Figures | Reference | 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 （1080）      PDF（pc） （15752KB）（210）       Knowledge map    Save Related Articles | Metrics

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Internal Standard Method-based Surface-enhanced Raman Spectroscopy for Quantitative Analysis BI Yingna, LIU Dingbin Chem. J. Chinese Universities    2025, 46 (2): 20240457-.   DOI: 10.7503/cjcu20240457 Abstract （935）   HTML （47）    PDF（pc） （13761KB）（561）       Knowledge map    Save Surface-enhanced Raman spectroscopy（SERS） is a spectral detection method that has been widely used in the fields of disease diagnosis， drug screening， and biological analysis， etc. It can not only provide rich chemical fingerprint information but also has the advantages of high sensitivity， resistance to photobleaching， and photodegradation. However， due to the poor uniformity of its enhancement matrix structure and the uncertainty of the number of chemical molecules adsorbed， the reproducibility of SERS detection results is poor， which makes it face many challenges in quantitative analysis. The deployment of internal standards could eliminate the external interference factors， thus achieving accurate quantitative analysis. We set out this review with a description of the mechanism of internal-standard methods， followed by introducing their main types. Thereafter， we introduced explanations of the applications of internal-standard probes in environmental analysis， food and drug analysis， and biological analysis. We conclude with an outlook of challenges and future development directions of internal-standard SERS. Table and Figures | Reference | Related Articles | Metrics

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Discovery of CDK2 Inhibitors Based on Machine Learning and Molecular Dynamics Simulations TAN Yingjia, CHEN Liang, LIU Yulin, NA Risong, ZHAO Xi Chem. J. Chinese Universities    2025, 46 (3): 20240442-.   DOI: 10.7503/cjcu20240442 Abstract （845）   HTML （14）    PDF（pc） （7091KB）（407）       Knowledge map    Save Four potential cyclin-dependent kinase 2（CDK2） inhibitors were discovered through machine learning and molecular dynamics simulation methods. First， a classification model for CDK2 inhibitors was established using existing large-scale activity databases and machine learning algorithms. The extreme gradient boosting（XGBoost） model with extended-connectivity fingerprints（ECFP6） was used to screen the Enamine database， identifying 1152 novel compounds. These potential compounds were then ranked based on their affinity for CDK2 using molecular docking and scoring functions. The compounds were clustered into four categories using fingerprint clustering methods， and one compound with a high docking score was selected from each category. Subsequently， the four selected compounds underwent drug-likeness analysis and molecular dynamics simulations. The four potential CDK2 inhibitors（Z1766368563， Z363564868， Z1891240670 and Z2701273053） demonstrated good drug-likeness properties and high binding free energy in molecular dynamics simulation results. The findings suggest that these four compounds can serve as lead compounds for subsequent modification and optimization as CDK2 inhibitors. Table and Figures | Reference | Supplementary Material | Related Articles | Metrics

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First-principles Study on the Catalysis of OER/ORR by N-doped Graphene with Defects HUANG Zhiyao, LI Li, XU Huaqing, YANG Yifan, WEI Yaoyao, LIU Guokui, XIA Qiying Chem. J. Chinese Universities    2025, 46 (2): 20240430-.   DOI: 10.7503/cjcu20240430 Abstract （838）   HTML （26）    PDF（pc） （2927KB）（538）       Knowledge map    Save Non-metallic doped graphene-based catalysts have good application prospects in catalyzing oxygen evolution reaction（OER） and oxygen reduction reaction（ORR）. Based on the common double vacancy defects of graphene， non-metallic N-doped catalytic material was constructed and all possible active sites were studied. Through DFT calculation， we find that none of the 13 carbon active sites can effectively adsorb H2O， while O2 can be effectively adsorbed. The calculation results show that the optimal catalytic site for ORR is C12， with the overpotential of 0.71 V for catalyzing ORR， followed by the C10 site adjacent to pyridine N and C3 site， with the overpotentials of 0.75 V and 0.78 V， respectively. This study demonstrates that non-metallic N-doped defective graphene materials can be applied to catalyze ORR， providing theoretical support and guidance for non-metallic catalysis in the OER/ORR reactions. Table and Figures | Reference | Supplementary Material | Related Articles | Metrics

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Synthesis of COF-LZU1 in Acetate Buffer and Immobilized Enzyme Study LIU Meng, XU Yi, YANG Fan, ZHOU Quan, REN Jing, REN Ruipeng, LYU Yongkang Chem. J. Chinese Universities    2025, 46 (2): 20240368-.   DOI: 10.7503/cjcu20240368 Abstract （837）   HTML （30）    PDF（pc） （2218KB）（163）       Knowledge map    Save COF-LZU1 was synthesized in acetate buffer at room temperature and used to immobilize laccase and horseradish peroxidase. Firstly， by optimizing the reaction conditions such as reaction concentration， reaction time， pH value of the acetate buffer， reaction temperature， washing solvent and drying method. In acetate buffer， COF-LZU1 was synthesized with high crystallinity at pH=4.5 with stirring at room temperature for 30 min， which has high specific surface area up to 501 m2/g， and higher thermal stability（480 ℃）. Then， under the aforementioned optimal reaction conditions， laccase and horseradish peroxidase were immobilized by in situ embedding with COF-LZU1 as a carrier， and their properties were investigated， which showed that the enzyme activities after immobilization were as high as 84.26% and 73.66%（with respect to the free enzyme activity）， and the relative activities were still maintained at about 80% after cycling for 10 times of use. Through multiple binding sites， COF-LZU1 effectively stabilized the active conformation of the enzyme， which made it less prone to structural deformation and improved the thermal stability， pH stability and reusability of the enzyme， etc. Acetate buffer is a commonly used buffer in biochemical experiments， which was used as both a solvent and a catalyst in the present experiments. Compared with the existing synthetic methods， the method has a better effect on the stability of biomolecules and is expected to provide a new solution for enzyme immobilization. Table and Figures | Reference | Supplementary Material | Related Articles | Metrics

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Machine Learning Model for Predicting the Glass Transition Temperature of Polyimides Based on Molecular Fingerprints and Quantum Chemical Descriptors ZHAN Senhua, SHI Tongfei Chem. J. Chinese Universities    2025, 46 (4): 20240556-.   DOI: 10.7503/cjcu20240556 Abstract （828）   HTML （26）    PDF（pc） （2175KB）（172）       Knowledge map    Save Combining machine learning and quantum chemistry methods to construct predictive models can facilitate the design and screening of polyimide material structures. In this study， Molecular ACCess System（MACCS） fingerprints and nine density functional theory（DFT） quantum chemical descriptors were obtained from polyimide repeating units to construct three types of predictive models： MACCS， DFT and their integrated models. Twelve machine learning models were developed using four algorithms——random forest（RF）， support vector regression （SVR）， extreme gradient boosting（XGB） and gradient boosting regression（GBR）——to predict the glass transition temperature of polyimides and extract key feature information. The results showed that the optimal predictive model for the glass transition temperature is the integrated XGBoost model， with coefficient of determination（R²） values of 0.956 and 0.811 for the training and test sets， respectively. The root mean square error（RMSE） and mean absolute error（MAE） for the test set are 25.41 and 20.20， respectively. Furthermore， the integrated MACCS fingerprint and DFT models performed better than the individual models. The established integrated model framework provides new insights for the structural design of polyimide materials and other polymer materials. Table and Figures | Reference | Related Articles | Metrics

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Preparation of Broad-spectrum UV Protection Carbon Dots for the Application of Sunscreen Absorber CHEN Qidan, CHEN Guanji, YOU Shanmei, ZANG Xinyao, YANG Bai Chem. J. Chinese Universities    2025, 46 (6): 20240313-.   DOI: 10.7503/cjcu20240313 Abstract （771）   HTML （15）    PDF（pc） （6000KB）（216）       Knowledge map    Save Sunscreen absorber， the basic ultraviolet（UV） protection additives that absorb UV rays， is the active ingredient in sunscreen products. However， traditional sunscreen absorbers are known as organic and inorganic chemicals which have problems such as unknown toxicity for human health and environment， instability， poor water solubility， and a narrow range of UV absorption， the study of eco-friendly broad-spectrum sunscreen absorber materials is important for the application of sunscreen products. In recent years， carbon dots have shown good properties in the application of UV absorbers due to their chemistry stability， eco-friendly， excellent UV absorption efficiency. In this study， two kinds of carbon dots（named O-CDs and A-CDs， respectively） were prepared from dopamine hydrochloride and o-phenylenediamine， citric acid and urea independently by simple one-pot hydrothermal synthesis method， purified by column chromatography and then characterized by X-ray photoelectron spectroscopy（XPS）， transmission electron microscopy（TEM）， X-ray diffraction（XRD）， Fourier transform infrared spectroscopy（FTIR）， Ultraviolet-visible spectroscopy（UV-Vis）， and fluorescence spectroscopy. The results showed that a broad-spectrum UV protection material named as B-CDs was developed by mixing O-CDs and A-CDs with the optimized mass ratio of 1∶1.5. In addition， the B-CDs were added as a broad-spectrum UV absorber to polyvinyl alcohol（PVA） solution to prepare the UV protection calligraphy ink， and the sunscreen effect stability of the ink was tested in a certain period（120 h）. The results indicated that the broad-spectrum carbon dots UV absorber is high- efficiency and stable， and carbon dots have the potential to be used as ideal photostable broad-spectrum UV absorber additives for sunscreen products. Table and Figures | Reference | Related Articles | Metrics

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Research Progress on Eutectic Gallium-indium and Self-assembled Monolayer-based Functional Molecular Junctions CHEN Xiaoping, HUANG Shi, GUO Qianqian, LIU Ning, NI Jiancong, YANG Weiqiang, LIN Zhenyu Chem. J. Chinese Universities    2025, 46 (2): 20240451-.   DOI: 10.7503/cjcu20240451 Abstract （750）   HTML （26）    PDF（pc） （14619KB）（495）       Knowledge map    Save Functional molecular electronics based on eutectic gallium⁃indium as top electrode and self-assembled monolayer（SAM） as active layer is one of the research hotspots in recent years. Domestically， the study on EGaIn-based functional molecular junctions（MJ） is still in the beginning state. This review introduces the advantages of EGaIn as top electrode and the fabrication of SAM-MJ in detail， and shows recent workers on rectifiers， memory， opto-electrical switches， thermoelectrics， and solid-state impedance and so on. We analyze the challenges of EGaIn-based molecular junctions and propose the future development directions. Table and Figures | Reference | Related Articles | Metrics

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Influence of Polycyclic Aromatic Hydrocarbon Molecular Framework on Single-molecule Conductance WANG Mingzhen, WANG Zhiye, LI Mengxiao, LU Yuhua, WANG Xu, LI Yunchuan Chem. J. Chinese Universities    2025, 46 (2): 20240429-.   DOI: 10.7503/cjcu20240429 Abstract （745）   HTML （22）    PDF（pc） （4103KB）（441）       Knowledge map    Save The charge transport process within molecular junctions is influenced by many factors， including the molecular backbones and anchoring groups. In this paper， to investigate the impact of the molecular backbone on the charge transport properties of molecular junctions， we designed and synthesized three kinds of polycyclic aromatic hydrocarbons（PAHs） with different fused-ring core（benzene， naphthalene and anthracene） as molecular skeleton and thiophene as anchor group. Scanning tunneling microscope break junction（STM-BJ） measurement and density functional theory（DFT） -based calculations were performed to investigate the charge transport process of single PAHs junctions. The STM experimental results of three molecules exhibit two distinct conductivity states， designated as high conductance states（GH） and low conductance states（GL）， which correspond to the two binding configurations of Au-π and Au-S within single molecular junctions for three molecules. In the case of the GL state， the increase of fused-ring core effectively shifts the HOMO level closer to the Au Fermi level， resulting in a conductance trend of GDT-A>GDT-N>GDT-B. In the GH state， the conductance value of three molecular junctions will not change obviously with the increase of π-conjugated area， but the increase in twist angle of PAHs results in an enhancement of steric hindrance， which reduces the probability of Au-π bonding configuration， ultimately leading to a change in the formation ratio of the two molecular configurations of Au-π and Au-S. Table and Figures | Reference | Supplementary Material | Related Articles | Metrics

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First-principles Study of Doping and Point Defects Modulating the Photodissociative Water Properties of MoS2/ZnO Heterojunction WEN Junqing, WANG Jiahui, ZHANG Jianmin Chem. J. Chinese Universities    2025, 46 (2): 20240380-.   DOI: 10.7503/cjcu20240380 Abstract （739）   HTML （17）    PDF（pc） （17502KB）（141）       Knowledge map    Save The electronic structures， optical properties and photocatalytic performance of MoS2/ZnO heterojunction doping with C and Pd elements and point defects were studied using first principles calculations. The stable sites of C and Pd atom doping MoS2/ZnO heterojunction is S2 and Zn site， and the stable defect point is Zn defect. The analysis of electronic structures shows that band edge position of the intrinsic MoS2/ZnO presents a type II band alignments with a direct band gap of 0.66 eV. Doping and defects can effectively regulate the band gap of MoS2/ZnO. Pd@Zn system exhibits magnetic semiconductor， VMo and VZn systems exhibit magnetic metallic properties. Doping and defects increase the light absorption coefficient of MoS2/ZnO heterojunction in the visible light range（500—760 nm）. Intrinsically， there is a built-in electric field from ZnO layer to MoS2 layer at the interface in the doping and defective MoS2/ZnO， which promotes charge transfer from ZnO layer to MoS2 layer. The charge transfer amount of Pd@Zn， C@S2&Pd@Zn increases. The intrinsic MoS2/ZnO， C@S2， Pd@Zn， VS1， VS2 and VO systems form direct Z-type heterojunctions， which promote the effective separation of photo generated electron hole pairs. The band edge potential of MoS2/ZnO， C@S2， Pd@Zn， VS1， VS2 and VO crosses the oxidation-reduction potential at pH=0 and 7， indicating that these heterojunctions can undergo oxidation-reduction reactions under strong acid solution and neutral solution conditions， and the carriers have strong oxidation-reduction ability. Table and Figures | Reference | Related Articles | Metrics

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Preparation of Carbon Dot-based Multicolor Room-temperature Phosphorescent Materials via Precursor Structure Regulation Strategies LIU Jinkun, RAN Zhun, LIU Qingqing, LIU Yingliang, ZHUANG Jianle, HU Chaofan Chem. J. Chinese Universities    2025, 46 (6): 20240412-.   DOI: 10.7503/cjcu20240412 Abstract （724）   HTML （14）    PDF（pc） （7651KB）（451）       Knowledge map    Save In this paper， a simple precursor molecular structure regulation strategy was presented， and carbon dot-based composites with phosphorescent emission colors covering the visible light spectrum were prepared through an in situ calcination method using Al2O3 as a matrix and various small molecules as organic precursors. Transmission electron microscopy， Fourier-transform infrared spectroscopy， X-ray diffraction， and X-ray photoelectron spectroscopy confirmed the successful growth of carbon dots within the Al2O3 matrix. Fluorescence spectroscopy tests indicated that the phosphorescent colors of the four CDs@Al2O3 composites were blue（454 nm）， green（520 nm）， orange（572 nm）， and red（632 nm）， with average lifetimes of 130.6， 293.6， 498.6， and 539.0 ms， respectively. The observed redshift in phosphorescent emission wavelength attributed to the decrease in the energy gap between the excited state and ground state of the carbon dots with increasing π-conjugation and number of oxygen-containing functional groups in the precursor， which achieved the modulation of multicolor phosphorescent emissions. Based on the multicolor room-temperature phosphorescent characteristics of this material， its applications in anti-counterfeiting and information encryption was preliminarily explored. Table and Figures | Reference | Supplementary Material | Related Articles | Metrics

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Theoretical Study of B， N Co-doped Fullerene C70 as Non-metal Electrocatalysts for Oxygen Reduction and Evolution YANG Siwei, HUANG Xuri Chem. J. Chinese Universities    2025, 46 (4): 20240490-.   DOI: 10.7503/cjcu20240490 Abstract （721）   HTML （43）    PDF（pc） （3465KB）（152）       Knowledge map    Save The oxygen reduction reaction（ORR） and oxygen evolution reaction（OER） properties for B， N co-doped fullerene C70［C68B（n）N（m）， n， m=1—5， representing the C atom sites substituted by B and N， respectively］ were investigated utilizing density functional theory. It is found that C68B（n）N（m） are thermodynamically stable， and their ΔG*OH has a good linear relationship with ΔG*OOH and ΔG*O. Wherein， the ORR overpotential for C68B（4）N（2） and C68B（5）N（2） catalysts are both 0.45 V， which is equivalent to that of commercial Pt catalyst. The OER overpotential of C68B（4）N（1） is the lowest， 0.38 V， which is better than that of the traditional RuO2 catalyst（0.42 V）. C68B（1）N（3） also shows the OER activity equivalent to that of RuO2. The overpotential of ORR and OER can be significantly reduced and the catalytic performance of C70 can be improved by accurately adjusting the sites of B and N co-doping. According to the activity trend plots， the best ORR and OER activities for C68B（n）N（m） appear at ΔG*O-ΔG*OH=0.92 eV and ΔG*O-ΔG*OH=1.42 eV， respectively. This work provides some clues for the design and discovery of novel non-metallic carbon-based electrocatalysts. Table and Figures | Reference | Related Articles | Metrics

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High-throughput Calculations of Host-guest Interactions Between Organic Structure-directing Agents and Zeolite Structures with Different Elemental Compositions LI Lin, WANG Chen, WANG Jiaze, LI Li Chem. J. Chinese Universities    2025, 46 (4): 20240497-.   DOI: 10.7503/cjcu20240497 Abstract （715）   HTML （40）    PDF（pc） （1553KB）（417）       Knowledge map    Save Zeolites are inorganic microporous crystalline materials with regulated channel structures， which are widely used in industrial adsorption separation and catalytic processes. This work selected 14 topologies that can be synthesized in the form of pure silica， aluminosilicate， and aluminophosphate from over 260 known zeolite topologies， and explored the structure-directing effects of different organic structure-directing agents（OSDAs） for zeolite frameworks with different compositions via high-throughput computational methods. Results show that the OSDAs significantly affects the elemental composition of zeolites， with certain OSDAs tending to direct the formation of pure silica or aluminosilicate structures， while others preferentially direct towards pure aluminophosphate structures. These findings not only deepen the understanding of the synthetic mechanism of zeolites， but also provide a theoretical basis for the design and synthesis of zeolites with specific elemental compositions. Table and Figures | Reference | Supplementary Material | Related Articles | Metrics

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Preparation and Applications of CO2-Derived Red-emissive Carbon Dots with a High Quantum Yield GUO Dan, HUANG Genghong, BAI Huijie, WANG Yaling, CAO Guangqun, LIU Bin, HU Shengliang Chem. J. Chinese Universities    2025, 46 (6): 20250091-.   DOI: 10.7503/cjcu20250091 Abstract （684）   HTML （6）    PDF（pc） （2374KB）（97）       Knowledge map    Save A five-membered cyclic carbonate compound， tris（hydroxymethyl）propyl pentacyclic carbonate（TPTE）， was synthesized using CO2 and trihydroxymethylpropane triglycidyl ether as starting materials via cycloaddition reaction. Subsequently， red-emissive carbon dots（R-CDs） with a quantum yield of 38% were prepared through a solvothermal method using TPTE and o-phenylenediamine as precursors and ethanol as the solvent. Structural characterization revealed that the obtained R-CDs exhibited an average particle size of 9.41 nm， with a highly graphitized carbon core and surface-rich hydroxyl and amino functional groups. Optical performance testing demonstrated that the R-CDs in ethanol solution displayed distinct excitation-independent characteristics， showing three-fingered emission peaks at 599， 648 and 702 nm under excitation at 535 nm， accompanied by a fluorescence lifetime of 6.46 ns. Theoretical calculations and spectroscopic analyses confirmed that these luminescent properties originated from extended π-conjugated systems within the carbon core inducing（π， π*） transitions. Notably， when combined with polyvinylpyrrolidone（PVP）， the ultraviolet-visible absorption and fluorescence emission characteristics of R-CDs remained essentially unchanged， indicating negligible electronic interactions between PVP matrices and R-CDs. Leveraging their excellent optical properties， R-CDs/PVP composites were employed as phosphors integrated with a 360 nm ultraviolet LED chip to fabricate red-emitting devices. The prepared LED exhibited CIE chromaticity coordinates of （0.42， 0.21）， precisely falling within the red light region with high monochromaticity. Significantly， this research achieved efficient indirect fixation of CO2 by converting it into functionalized cyclic carbonate precursors， providing an innovative approach for greenhouse gas valorization. This integrated strategy combining high-quantum-yield fluorescent material development with carbon reduction technology holds substantial application potential in optoelectronic devices and green chemistry. Table and Figures | Reference | Related Articles | Metrics

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Research Progress of Carbon-based Moisture Power Generation Devices LI Qijun, ZHAO Hongjia, LIU Longtao, LU Chunyi, TAN Jing Chem. J. Chinese Universities    2025, 46 (6): 20240413-.   DOI: 10.7503/cjcu20240413 Abstract （682）   HTML （15）    PDF（pc） （31544KB）（184）       Knowledge map    Save Moisture-enabled electricity generation（MEG）， an emerging energy-harvesting technology， has attracted significant attention in recent years. Owing to the ubiquitous presence of water vapor and the pollution-free nature of the power generation process， MEG technology demonstrates strong adaptability， that is， it is not limited by natural conditions such as season， region and environment. This paper presents a comprehensive review of the evolution of MEG technology. It discusses the interaction mechanism between moisture and power generation materials， primarily focusing on ion gradient diffusion and streaming potential. It also provides a detailed analysis of the types， characteristics， advantages and disadvantages of new carbon-based hygroscopic layer materials. Furthermore， it describes the development of moisture power generation technology in the latest application fields. Table and Figures | Reference | Related Articles | Metrics

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Applications and Prospects of Carbon Dots in Interface Engineering of Organic Solar Cells WANG Xin, WANG Yu, MU Fumao, YAN Lingpeng, WANG Zhenguo, YANG Yongzhen Chem. J. Chinese Universities    2025, 46 (6): 20240416-.   DOI: 10.7503/cjcu20240416 Abstract （623）   HTML （19）    PDF（pc） （8604KB）（139）       Knowledge map    Save Organic solar cells（OSCs） have gradually become a research focus in the photovoltaic field due to their advantages， such as simple fabrication processes， diverse material sources， flexibility， and roll-to-roll production capability. However， as OSCs move toward further commercialization， they face challenges such as improving power conversion efficiency（PCE）， scaling up production， reducing costs， and enhancing stability. In addressing these issues， carbon dots（CDs） have garnered widespread attention due to their low cost， diverse structures， environmental friendliness， wide availability， high conductivity， and good stability. In OSC devices， CDs can be used as charge transport layers and interface modification materials， improving the energy level matching and charge transport performance at the cell interface through interface engineering， thereby enhancing the overall performance of OSCs and providing new insights for the development of photovoltaic cells. In this review， the concept， classification， and unique structural features of CDs are introduced. Then， the excellent tunable optoelectronic properties and functionalization modification methods of CDs are highlighted. Furthermore， the application of CDs in the field of interface engineering of OSCs is comprehensively summarized， and finally the challenges associated with CDs-based interface materials in OSCs， along with prospects for their further development， are addressed. Table and Figures | Reference | Related Articles | Metrics

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Synthesis and Temperature Control Performance of Silica Gel Waste Composite Phase Change Materials XIE Zhuoxue, KOU Yan, SHI Quan, TIAN Ying Chem. J. Chinese Universities    2025, 46 (2): 20240372-.   DOI: 10.7503/cjcu20240372 Abstract （614）   HTML （18）    PDF（pc） （6908KB）（417）       Knowledge map    Save In this study， silica gel waste（SGW） was utilized to prepare porous silicon dioxide（PSD） as a carrier， combined with capric acid-hexadecyl alcohol（DA-HD） as the base phase change material（PCM）， to develop the composite PCM capric acid-hexadecyl alcohol/porous silicon dioxide（PSD-DA-HD）. Expanded graphite（EG） was introduced to enhance the thermal conductivity of the material. The thermal performance of the composite PCM was evaluated using differential scanning calorimetry（DSC）， thermogravimetric analysis（TGA）， and thermal constant analysis. The composite PCM was then blended with cement mortar to form phase change mortar， and its temperature regulation capability was studied in simulated application experiments. The results indicate that DA-HD is physically encapsulated within the pores of PSD， achieving a loading capacity of 61.7%， with an enthalpy value of 105.6 J/g. The PSD-DA-HD composite PCM demonstrates good shape stability. The introduction of expanded graphite increased the thermal conductivity of the PSD/EG-DA-HD composite PCM to 0.9513 W·m‒1·K‒1 but reduced its loading capacity to 49.5%， with an enthalpy value of 88.1 J/g. Both PSD-DA-HD and PSD/EG-DA-HD exhibit a maximum working temperature of 92.2 ℃， ensuring thermal stability below this threshold. When PSD-DA-HD and PSD/EG-DA-HD were mixed with cement mortar， the resulting phase change mortars displayed excellent heat storage and temperature regulation properties. The phase change mortars C-PSD-DA-HD and C-PSD/EG-DA-HD maintained stable temperatures for 12.7 and 6.7 min， respectively， within the temperature range of 18—32 ℃. In the simulation experiments， the phase change mortar containing PSD-DA-HD extended the temperature regulation duration by 267.92% compared to the control group without PCMs in the same temperature range. Table and Figures | Reference | Supplementary Material | Related Articles | Metrics

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Synthesis， Structure， Magnetism of a Thorium-Iron Oxo Cluster and Its Application in Catalyzing the Coupling Reaction of Benzylamine WANG Chunhui, ZHANG Yang, HAN Zhe, GAO Yuan, HE Puyong, FAN Chaoyue, QIU Jie Chem. J. Chinese Universities    2025, 46 (3): 20240437-.   DOI: 10.7503/cjcu20240437 Abstract （602）   HTML （34）    PDF（pc） （3390KB）（202）       Knowledge map    Save A novel negatively charged thorium-iron oxo cluster， ［Th2Fe10O4（C6H5PO3）12（CH3O）8Cl4］6-（Th2Fe10） was synthesized via the solvothermal method. Multiple techniques were employed to investigate its structure， chemical compositions， magnetic properties and catalytic performance. Single-crystal X-ray diffraction data revealed that the structure of Th2Fe10 represents a novel dodecanuclear Th-Fe oxo cluster， which is formed due to the synergistic hydrolysis， alcoholysis and condensation reactions of Th（Ⅳ） and Fe（Ⅲ） ions， along with the passivation by phenylphosphonate groups. Th2Fe10 is not only the second reported Th-Fe oxo cluster， but also one of the few actinide-transition metal oxo clusters. The crystals of Th2Fe10 exhibit remarkable visible light absorption properties and strong antiferromagnetic exchange interactions between Fe（Ⅲ） ions. Moreover， Th2Fe10 possesses excellent performance in catalyzing the benzylamine coupling reaction， achieving up to 94% conversion and 96% selectivity， while maintaining good catalytic performance after multiple cycles. Scavenging experiments of reactive species demonstrated that electrons， holes， 1O2 and ·OH play significant roles in the catalytic process， which was further verified through electrochemical measurements and electron paramagnetic resonance（EPR） spectroscopy. The catalytic reaction mechanism was postulated based on these experimental results. Table and Figures | Reference | Supplementary Material | Related Articles | Metrics

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ZIF-8 Nanosheet-functionalized Poly（lactic acid） Nanofibrous Membranes for Efficient Filtration of Ultrafine Particles WANG Shengcheng, WANG Cunmin, HAO Yaxin, ZHU Guiying, LI Xinyu, SONG Xinyi, ZHANG Mingming, XU Huan, HE Xinjian Chem. J. Chinese Universities    2025, 46 (2): 20240426-.   DOI: 10.7503/cjcu20240426 Abstract （602）   HTML （23）    PDF（pc） （10193KB）（399）       Knowledge map    Save Zeolite imidazolate framework-8（ZIF-8） nanosheets（ZIF-8-NS） with high specific surface area were prepared by micro-assisted synthesis method， and uniformly dispersed into poly（lactic acid）（PLA） solution as nano-dielectrics， then ZIF-8-NS-functionalized PLA（PLA/ZIF-8-NS） nanofibers were prepared by electrospinning to improve the filtration efficiency and to achieve the long-lasting respiratory protection for the operators. The microstructure and properties of the prepared PLA/ZIF-8-NS nanofibrous membranes were investigated. It was found that the addition of ZIF-8-NS resulted in a significant refinement of PLA/ZIF-8-NS fibers（253 nm） and an increase in fiber surface roughness. The surface potential of PLA/ZIF-8-NS nanofibrous membrane reached 10.4 kV and the dielectric constant reached 2.71， demonstrating excellent charge storage capability. At the same time， the PLA/ZIF-8-NS nanofibrous membrane was given excellent filtration performance for ultrafine particles， and the filtration efficiency for PM0.3 and PM0.3—2.5 reached 95.57% and 99.95% respectively under the high air flow rate of 85 L/min， with an air resistance of 305.3 Pa， and the filtration efficiency for PM0.3 still maintained at a high level of 98.50% after 360 min of filtration. In addition， the PLA/ZIF-8-NS nanofibrous membrane exhibited superior antimicrobial properties， with an inhibition rate of 99.9% against Staphylococcus aureus. These results indicate that PLA/ZIF-8-NS nanofibrous membranes have great potential to achieve long-term filtration and low resistance to ultrafine particles， which can provide an important safeguard for respiratory health protection of personnel operating in high dust concentration environment. Table and Figures | Reference | Related Articles | Metrics