Top Read Articles

Published in last 1 year |  In last 2 years |  In last 3 years |  All

Please wait a minute...


For Selected: Download Citations EndNote Ris BibTeX Toggle Thumbnails

Select

Cover and Content of Chemical Journal of Chinese Universities Vol.47 No.1(2026) Chem. J. Chinese Universities    2026, 47 (1): 1-6.   Abstract （2607）      PDF（pc） （26559KB）（215）       Knowledge map    Save Related Articles | Metrics

Select

Cover and Content of Chemical Journal of Chinese Universities Vol.46 No.10(2025) Chem. J. Chinese Universities    2025, 46 (10): 1-4.   Abstract （1223）      PDF（pc） （15752KB）（260）       Knowledge map    Save Related Articles | Metrics

Select

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 （875）   HTML （9）    PDF（pc） （2901KB）（112）       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

Select

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 （874）   HTML （11）    PDF（pc） （6810KB）（526）       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

Select

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 （722）   HTML （84）    PDF（pc） （4477KB）（335）       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

Select

Continuous Synthesis Process of Key Intermediates for the Herbicide Clethodim REN Shilun, HUANG Cheng, CHEN Jianai, LI Mimi, MA Jingrui, YUAN Qiliang, TAN Chengxia Chem. J. Chinese Universities    2025, 46 (12): 20250187-.   DOI: 10.7503/cjcu20250187 Abstract （688）   HTML （17）    PDF（pc） （1490KB）（151）       Knowledge map    Save Clethodim， known for its high efficacy， low toxicity， broad herbicidal spectrum， extended application window and safety to subsequent crops， has become a representative cyclohexenone herbicide. 5-［2-（Ethylthio） propyl］-2-propionyl-3-hydroxy-2-cyclohexen-1-one（abbreviated as Jing-Santong）， a key intermediate of clethodim， faces challenges in traditional batch synthesis， such as low reaction efficiency and high energy consumption. This study developed a continuous-flow microchannel technology for the critical synthesis steps. By optimizing the cyclization and hydrolysis processes， the reaction time was reduced from 90 min to 4.8 min， achieving a 65.2% yield and 95.2% purity. The novel process significantly improves reaction efficiency and product quality， offering a promising approach for the industrial production of clethodim. Table and Figures | Reference | Supplementary Material | Related Articles | Metrics

Select

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 （661）   HTML （23）    PDF（pc） （4119KB）（191）       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

Select

Controlled Synthesis of Zinc Oxide Microcrystals with Distinct Morphologies via Hydrothermal Method CHEN Yang, WANG Fuxiang, QIU Yiduo, HUANG Yutong, ZHAO Xiaojun, PAN Qinhe Chem. J. Chinese Universities    2026, 47 (2): 20250208-.   DOI: 10.7503/cjcu20250208 Abstract （644）   HTML （14）    PDF（pc） （13734KB）（206）       Knowledge map    Save A method of hydrothermal synthesis coupled with activation etching was employed to synthesize zinc oxide（ZnO） particles with six distinct morphologies： rod， tube， screw， rod-flower， tube-flower， and screw-flower. The controlled synthesis of ZnO from dispersed rods to aggregated rod-flower clusters was achieved by adjusting the parameters of the hydrothermal reaction. Moreover， by exploiting the differences in the stability of various crystal faces， a customized post-etching method was used to effectively control the morphological evolution of ZnO from rod-like structure to tubular and screw-like structures. The results of photoelectrochemical test indicated that the distinct morphology of ZnO played a significant role in its photoelectrochemical property. These findings offer valuable insights into the synthesis of ZnO with specific morphologies to tailor its properties for particular application. Table and Figures | Reference | Related Articles | Metrics

Select

Research Progress of MOF-SACs in Water Splitting for Hydrogen Evolution Reaction HE Yutong, LI Hanxi, FAN Xiaoyan, YU Meihui, ZHANG Jijie Chem. J. Chinese Universities    2026, 47 (3): 20250333-.   DOI: 10.7503/cjcu20250333 Abstract （616）   HTML （50）    PDF（pc） （10493KB）（30686）       Knowledge map    Save The hydrogen evolution reaction（HER） from photocatalytic and electrocatalytic water splitting is a pivotal technology of future green hydrogen economy， but the synthesis of low cost， high efficiency catalysts with high stability remains a critical scientific challenge to be addressed for both. Single-atom catalysts（SACs） are regarded as one of the most promising catalysts due to their unique electronic structure and maximum atomic utilization. The metal-organic framework materials（MOFs） are ideal single atoms carriers due to ultra-high specific surface area， tunable porous nanostructure， and abundant active sites， serving as SACs synthesis precursors owing to their unique pyrolysis characteristics. The composite system of MOFs and single atom catalysts（MOF-SACs） can take full advantage of the synergistic effect， thus improving the hydrogen evolution catalytic activity significantly. In this review， the recent applications and research progress of MOF-SACs in photocatalytic and electrocatalytic water splitting for hydrogen production progress are introduced， while the strategies for enhancing the catalytic activity are summarized. Moreover， the future research hotspots and trends are outlined， which can provide novel design models for HER catalysts. Table and Figures | Reference | Related Articles | Metrics

Select

Fabrication of High-reflectance and Low-thermal-conductivity HGM@TiO₂@ZnO Core-shell-shell Material via Rotational Coating QI Wenjia, ZHAO Kaiqing, WU Gang, WUMAIER·Yasen , TONG Gangsheng Chem. J. Chinese Universities    2025, 46 (11): 20250185-.   DOI: 10.7503/cjcu20250185 Abstract （608）   HTML （25）    PDF（pc） （5376KB）（338）       Knowledge map    Save Hollow glass microspheres（HGM） was utilized as the substrate and sequentially was coated with eggshell-like TiO₂ and needle-like nano-ZnO through a rotational coating process and a two-step heterogeneous precipitation method， constructing a high-reflectance， low-thermal-conductivity core-shell-shell material HGM@TiO2@ZnO. Research demonstrates that the obtained HGM@TiO₂@ZnO exhibits a hollow core structure that reduces heat transfer efficiency. The dual-shell structure， comprising high and low refractive index layers， induces multi-level reflection and scattering of light， while the cavity structures formed between the needle-like nano-ZnO further decrease the thermal conductivity of HGM@TiO₂@ZnO， achieving a dual synergistic effect of "reflection-thermal insulation". Results indicate that the HGM@TiO₂@ZnO material achieves an average solar reflectance up to 88.64% in the visible-near-infrared（380—2500 nm） range， representing improvements of 25.6%， 6.2%， and 10.0% compared to HGM， HGM@TiO₂， and physically blended material HGM&TiO₂&ZnO， respectively. When HGM@TiO₂@ZnO was added to an acrylic resin matrix at volume fraction of 40%， the resulting coating exhibited an average solar reflectance of 72.86% and a thermal conductivity as low as 0.08 W·m-1·K-1. Compared to coatings with the same volume fraction of HGM added to the acrylic resin， the reflectance increased by 5.4%， while the thermal conductivity decreased by 34%. Thus， this study elucidates the synergistic regulation mechanism of the core-shell-shell hierarchical structure on photothermal performance， providing theoretical support and material foundations for the development of high-efficiency thermal-reflective and insulating functional coatings. Table and Figures | Reference | Related Articles | Metrics

Select

Preparation of SrAl2O4@SiO2 Core@shell Structure Composites and Their Luminescence and Anti-hydrolysis Property FU Jialin, ZHU Yufeng, YANG Kaiyuan, GUO Yongmei, LU Yan, YAO Tongjie Chem. J. Chinese Universities    2025, 46 (10): 20250214-.   DOI: 10.7503/cjcu20250214 Abstract （593）   HTML （78）    PDF（pc） （5046KB）（185）       Knowledge map    Save Hydrolysis in alkaline condition and inferior temperature resistance property were two disadvantages of SrAl2O4∶Eu2+，Dy3+（SrAl2O4） long persistence phosphors. To address these two issues， this study employed ethylene glycol as a non-aqueous reaction medium to cover a SiO2 layer on the SrAl2O4 surface. This strategy effectively isolated the SrAl2O4 matrix from water molecules， hence avoiding the side hydrolysis reactions during the coating process. After careful study， the optimized coating process was determined as follows： solution pH value was 11.0， reaction temperature was 80.0 ℃， reaction time was 2.0 h， Na2SiO3 dosage（mass） was 6.0% of SrAl2O4 powders. Under the optimized condition， a dense SiO2 layer with the thickness of 60 nm was seamlessly coated on SrAl2O4 surface， leading to a SrAl2O4@SiO2 core@shell composite. According to X-ray diffraction pattern， the crystal phase of the SrAl2O4 was not changed during the coating process. Compared to the pristine SrAl2O4， the luminescence intensity of composites was only reduced 11.2%， while the anti-hydrolysis property was largely improved. In practical application， the bright green color could be easily observed by naked eyes after the composite was washed for 6 h in the presence of detergent. The thermogravimetric analysis indicated the remained weight of SrAl2O4@SiO2 composites was 93.7%（mass fraction） after calcinated at 800 ℃. This study provided a novel way to improve the anti-hydrolysis property and high-temperature resistance property of SrAl2O4 without remarkably sacrificing their luminescence property， and this is beneficial for their real application in fire protection. Table and Figures | Reference | Related Articles | Metrics

Select

Preparation and Property of Sponge-like Graphene Oxide/Polyethylene Glycol Composite Phase Change Materials CAI Lei, LI Lizhe, LI Hao, CAI Chang, LI Tiehu Chem. J. Chinese Universities    2025, 46 (10): 20250035-.   DOI: 10.7503/cjcu20250035 Abstract （542）   HTML （6）    PDF（pc） （10270KB）（103）       Knowledge map    Save To address the challenges of high carrier mass and insufficient thermal conductivity in existing composite phase change materials（CPCMs）， this study synthesized graphene oxide（GO） colloidal solutions via an improved Hummers method. A sponge-like graphene oxide（SLGO） with a porous structure was further fabricated through freeze-drying technology. Utilizing SLGO as the carrier and polyethylene glycol（PEG） as the phase change medium， the SLGO/PEG composite phase change material was prepared by combining vacuum impregnation with ultrasonic- assisted processing. The microstructure and thermophysical properties of the composite materials were systematically characterized using ultraviolet-visible（UV-Vis） spectroscopy， scanning electron microscopy（SEM）， Fourier-transform infrared（FTIR） spectroscopy， X-ray diffraction（XRD）， differential scanning calorimetry（DSC）， and laser thermal conductivity analysis. The results demonstrate that PEG effectively fills the pores of SLGO and adsorbs onto its layers， significantly expanding the graphene interlayer space and forming stable hydrogen bonds with oxygen-containing functional groups on the SLGO surface. The composite materials exhibited high latent heat values exceeding 179 J/g and crystallization enthalpies of 172.7 J/g， with relative enthalpy efficiencies over 90%， highlighting their excellent energy storage performance. Most importantly， the addition of SLGO significantly enhanced the thermal conductivity of the material， reaching 0.98 W·m-1·K-1 when the mass fraction of SLGO was increased to 1%. Furthermore， the shape stabilization of the composite material was significantly enhanced with higher SLGO content. Table and Figures | Reference | Related Articles | Metrics

Select

Shear-induced Gelation Kinetics and Mechanisms of Silk Fibroin Hydrogels LU Jialin, ZHUANG Yaling, WANG Yanan, CHANG Fei, DING Jianxun, CHEN Xuesi Chem. J. Chinese Universities    2026, 47 (1): 20250327-.   DOI: 10.7503/cjcu20250327 Abstract （541）   HTML （23）    PDF（pc） （8933KB）（177）       Knowledge map    Save A shear-heating method was employed to induce the formation of silk fibroin hydrogels enrich in β-sheet structures. The effects of shear duration， incubation temperature， and protein concentration on the kinetics of β-sheet assembly and the mechanical properties of resulting hydrogels were systematically investigated. The results demonstrated that a 0.03 g/mLsilk fibroin solution subjected to shear at 10000 r/min for 10 min and followed by incubation at 60 ℃ completed gelation within 30 min， yielding a physically cross-linked network containing 63.51% β-sheet structures， with a storage modulus of 25.70 kPa and a compressive strength of 108.29 kPa. Furthermore， the self-assembly kinetics of molecular chain transition from random coils to β-sheet structures and the corresponding evolution of mechanical properties were elucidated. This work provides optimized processing strategies and experimental evidence for the preparation of shear-induced silk fibroin hydrogels and supports their potential applications in tissue engineering. Table and Figures | Reference | Related Articles | Metrics

Select

Design， Synthesis and Biological Evaluation of ERK Inhibitors with Isoindolin-1-one Structure ZHANG Lingzhi, JU Qiurong, GUAN Zhe, ZHU Qihua, ZHANG Tingting, YANG Shiqin, XU Yungen Chem. J. Chinese Universities    2025, 46 (10): 20250123-.   DOI: 10.7503/cjcu20250123 Abstract （538）   HTML （20）    PDF（pc） （2424KB）（103）       Knowledge map    Save Using the ERK inhibitor EK-I-22 and MK-8353 as the lead compounds， 14 compounds were designed and synthesized by pharmacophore fusion strategy. Preliminary pharmacological activity assessments revealed that compounds 19a（IC50=16 nmol/L）， 19b（IC50=15 nmol/L）， 19e（IC50=20 nmol/L）， 27a（IC50=19 nmol/L） and 27b（IC50=56 nmol/L） exhibited significant inhibitory activity against ERK2 kinase. Notably， compound 27b demonstrated moderate inhibitory effects against four human tumor cell lines（Colo-205， A375， A2058 and HT-29）. Table and Figures | Reference | Related Articles | Metrics

Select

Design Strategies for DNA Strand Displacement Reactions via Secondary Structure Modulation of DNA Strands LI Zimu, TANG Yuqing, CHENG Jianing, SUN Chenyun, LYU Hui, ZUO Xiaolei Chem. J. Chinese Universities    2025, 46 (10): 20250174-.   DOI: 10.7503/cjcu20250174 Abstract （535）   HTML （13）    PDF（pc） （3095KB）（204）       Knowledge map    Save In this study， various types of self-complementary secondary structures were introduced into the input single-strand DNA of strand displacement reactions to change their free energy and conformations， aiming to investigate the influence of different structures on the rate of the strand displacement reaction. We found that the reaction rate decreased as the length of the self-complementary structure increased. This effect was more pronounced when the self-complementary structure was designed in the toehold domain than when it formed in the non-toehold region. The incorporation of secondary structures into the input strands led to varying degrees of reduction in strand displacement reaction rates， and in some cases， completely inhibited the reaction. Finally， we elucidate the mechanism by which secondary structures influence the kinetics of strand displacement reactions， offering new insights into expanding the temporal regulation capabilities of DNA strand displacement and advancing its applications in DNA molecular computing and biosensing. Table and Figures | Reference | Related Articles | Metrics

Select

One-step Preparation of Novel Fluorescent Carbon Dots for Cell Imaging FAN Hongting, XU Jiatong, QI Chunxuan, MA Hengchang Chem. J. Chinese Universities    2025, 46 (11): 20250166-.   DOI: 10.7503/cjcu20250166 Abstract （531）   HTML （10）    PDF（pc） （6788KB）（168）       Knowledge map    Save In this study， novel fluorescent carbon dots（CDs） were rapidly synthesized via a one-step hydrothermal method using 1，8-naphthalic anhydride（NA） and 1，2-phenylenediamine（OPD） as precursors. By optimizing reaction conditions， yellow fluorescent carbon dots（Y3-CDs） with superior luminescence performance were prepared. The particle sizes and morphology of the Y3-CDs were characterized by high-resolution transmission electron microscopy（HRTEM）， revealing an average diameter of approximately 2.6 nm and an interlayer spacing of 0.21 nm. This spacing corresponds to the d-spacing of graphene（100） planes and is consistent with the diffraction peak observed at 42.88o in X-ray powder diffraction（XRD） analysis. X-ray photoelectron spectroscopy（XPS） confirmed the presence of sp2 /sp3 hybridized carbons（C=C/C—C， 284.8 eV）， carbon-nitrogen bonds（C—N， 286.5 eV）， and carbonyl carbons（C=O， 288.4 eV）. The optical properties of the Y3-CDs were further investigated using fluorescence spectrometry（FL）， ultraviolet-visible absorption spectroscopy（UV-Vis）， and lifetime measurements. The fluorescence spectra exhibited non-excitation-dependent emission behavior， indicating a single emission center. Fourier-transform infrared spectroscopy（FTIR） and nuclear magnetic resonance（NMR） provided detailed structural insights. Due to their high purity， the characteristic hydrogen（H） and carbon（C） atoms could be clearly resolved and analyzed. 1H NMR results demonstrated that all H atoms were located on the surface of the carbon core， exhibiting ortho-substitution patterns and coupling effects. 13C NMR and DEPT 135 spectra confirmed the presence of ten distinct tertiary carbon atoms. The cell-tracking and imaging performance of Y3-CDs were systematically evaluated. Results demonstrated that Y3-CDs possess excellent cell imaging capabilities and anti-photobleaching properties. Even after 180 minutes of continuous irradiation， Y3-CDs retained strong fluorescence， enabling long-term tracking of HeLa cells. Co-localization experiments further highlighted their selective lipid droplet imaging ability， with a Pearson’s correlation coefficient of 0.846. Table and Figures | Reference | Supplementary Material | Related Articles | Metrics

Select

Study on Solvates and Polymorphs of Mometasone Furoate WANG Yixuan, LIU Qi, ZHOU Lei, CAI Baoli, WANG Xuezhong, HE Yunliang Chem. J. Chinese Universities    2025, 46 (12): 20250186-.   DOI: 10.7503/cjcu20250186 Abstract （522）   HTML （11）    PDF（pc） （4689KB）（175）       Knowledge map    Save Mometasone furoate（MF） is a potent synthetic corticosteroid widely used in the treatment of asthma， skin inflammation and pruritic diseases. This study discovered six solvates of MF（acetonitrile， methanol， acetone， dichloromethane， ethyl acetate and tetrahydrofuran solvates）， and the crystal structure of the acetonitrile solvate and dichloromethane solvate were successfully resolved using single-crystal X-ray diffraction. Crystal structure analysis showed that the acetonitrile solvate belongs to the same P212121 space group as the known Form 1， but its PXRD pattern differs significantly. The dichloromethane solvate belongs to a new space group different from the anhydrous Form 1 and the hydrate. The MF molecule has an irregular shape with two large rotatable groups， which can form large cavity structures with adjustable sizes during crystal packing， enabling it to accommodate solvent molecules of different sizes and thus form various solvates. The stability of the solvates under different environments and their polymorphic transformations were studied by PXRD. The solvates of dichloromethane， acetonitrile， and ethyl acetate were unstable at room temperature， spontaneously desolvating and converting into a new metastable form， while the solvates of tetrahydrofuran， acetone， and methanol were relatively stable at room temperature. All these solvates and the new metastable forms converted to Form 1 upon heating. Table and Figures | Reference | Related Articles | Metrics

Select

Synergistic Catalysis of Cu/TS-1 for Low-temperature Methanol Steam Reforming Reaction LU Qing, CHEN Xue, LIU Yuanyuan, WANG Fei, TUO Yongxiao, ZHAO Haoyang, YI Chenxue, MU Taoyang, XU Shaofei, QIN Haotian, FENG Xiang, CHEN De Chem. J. Chinese Universities    2025, 46 (10): 20250167-.   DOI: 10.7503/cjcu20250167 Abstract （519）   HTML （7）    PDF（pc） （4342KB）（94）       Knowledge map    Save Low-temperature methanol steam reforming（L-MSR） for hydrogen production is a promising approach to addressing the challenges of hydrogen energy sustainability and uneven hydrogen sources distribution. This research focuses on investigating the performance of copper-loaded titanium silicate molecular sieves（Cu/TS-1） with varying Ti coordination configurations in hydrogen production via L-MSR. Through comprehensive characterization employing X-ray diffraction（XRD）， transmission electron microscope（TEM）， NH3-temperature programmed desorption（TPD） and CO2-TPD， we demonstrate that the synergistic adsorption interaction between Cu and framework Ti significantly enhances both the low-temperature catalytic activity and stability. The results indicate that under atmospheric pressure at 240 ℃ with a water/methanol ratio of 2， the Cu/TS-1 catalyst exhibits a hydrogen production rate of 148.4 mmol·g-1·h-1 and its copper mass-specific activity reaches 891 mmol·g-1·h-1， representing a 1.4-fold enhancement compared to the ca. 621 mmol·g-1·h-1 of the co-precipitation synthesized Cu/ZnO catalyst reported in literature. Structural-activity relationship analysis reveals that the framework Ti in TS-1 increases the weak acidic sites， improves the Cu nanoparticles dispersion， and strengthens the interaction between Cu and TS-1 surface. Additionally， the interaction between framework Ti and Cu nanoparticles facilitates the formation of bidentate CO2 adsorption sites， optimizing the adsorption of formic acid intermediates and accelerating their decomposition， which significantly boosts low-temperature hydrogen production. Table and Figures | Reference | Related Articles | Metrics

Select

Thiadiazole-based Rare Earth Metal-organic Frameworks for Efficient Catalysis of CO2 Cycloaddition Reactions GUO Jingpeng, ZHANG Hangchuan, WEI Na, WANG Shu, JIANG Hongbo, ZHAO Zhen Chem. J. Chinese Universities    2025, 46 (10): 20250196-.   DOI: 10.7503/cjcu20250196 Abstract （514）   HTML （9）    PDF（pc） （3599KB）（151）       Knowledge map    Save A series of novel isostructural three-dimensional rare earth metal-organic frameworks（MOFs）， ［RE4（BTDI）3（DMF）4］·solv（RE-BTDI， RE=Er， Dy， Y）， was synthesized by solvothermal method using tetracarboxylic acid ligand containing thiadiazole groups， 5，5′-（benzothiadiazole-4，7-diyl）diisophthalic acid（H4BTDI）， and rare earth metal nitrates. The rare earth metal nodes on the frameworks of RE-BTDI are Lewis acidic sites which was confirmed qualitatively and quantitatively by Py-IR and NH3-TPD. Meanwhile， the thiadiazole groups introduced by ligands can be used as polar sites to enhance the CO2 adsorption performance of these materials. Under the synergy of the Lewis acidic sites and thiadiazole groups， RE-BTDI showed good catalytic activity for the cycloaddition reaction of CO2 and a series of epoxides. Under the conditions of 80 ℃， 1 MPa CO2， 0.1%（molar fraction） RE-BTDI catalyzed the cycloaddition reaction of CO2 and styrene oxide for 5 h， the yield of styrene cyclic carbonate can reach 90%， and after 5 rounds of cyclic catalysis， the catalytic activity and catalyst structure maintained well. In addition， for other epoxides， the yields of the corresponding cyclic carbonate products can reach 92.5% to 99.0% catalyzed by RE-BTDI under relatively mild conditions. Table and Figures | Reference | Related Articles | Metrics

Select

Preparation of a Chiral Polyimine Macrocycle Bonded Chiral Stationary Phase via Thiol-ene Click Reaction for Enantioseparation in High-performance Liquid Chromatography WU Jialei, YU Liqin, XIE Shengming, WANG Bangjin, ZHANG Junhui, YUAN Liming Chem. J. Chinese Universities    2025, 46 (11): 20250102-.   DOI: 10.7503/cjcu20250102 Abstract （511）   HTML （9）    PDF（pc） （2038KB）（83）       Knowledge map    Save In this study， a chiral polyimine macrocycle， BINOL-CPM， was synthesized via a one-step condensation of（S）-2，2′-dihydroxy-［1，1′-binaphthalene］-3，3′-dialdehyde and 1，2-phenylenediamine. After modification， it was bonded to the surface of thiolated silica via thiol-ene click reaction to fabricate a chiral stationary phase（CSP） for high-performance liquid chromatography（HPLC）. The CSP-packed column exhibits good chiral separation performance in both normal-phase（NP） and reversed-phase（RP） elution modes， with 12 racemates resolved in the NP mode and 6 racemates resolved in the RP mode. The chiral separation performance of this column for these resolved racemates was compared with two commonly used commercial columns， Chiralpak AD-H and Chiralcel OD-H. Among the 12 racemates resolved in the NP mode， 4 racemates， ［1-（3-fluorophenyl）ethanol， 1-phenylethanol， 3-hydroxy-2-butanone and 1-（4-fluorophenyl）ethanol］， could not be resolved on the Chiralpak AD-H column， and 3 racemates， ［1-（3-fluorophenyl）ethanol， 3-hydroxy-2-butanone and 1-（4-fluorophenyl）ethanol］， could not be resolved on the Chiralcel OD-H column. Among the 6 racemates resolved in the RP mode， one racemate（1-phenylethanol）， could not be resolved on the Chiralpak AD-H column. Moreover， the resolution values（Rs） of some racemates on this column were higher than those on the two commercial columns. Therefore， this prepared column demonstrates good complementarity in chiral separation， enabling the separation of some chiral compounds that cannot be resolved or be well resolved by these two commercial columns. In addition， the column also demonstrates excellent reproducibility and stability in chiral separation. After hundreds of injections， the retention time（tR） and Rs of the two enantiomeric peaks for the separation of ethyl mandelate show no significant changes compared to the initial use of the column. The relative standard deviation（RSD， n=5） of tR for the chromatographic peaks of the two enantiomers was less than 0.49%， and the RSD of Rs（n=5） was less than 2.88%. Moreover， the column-to-column reproducibility was also good， with the RSD（n=3） of tR and Rs for the two enantiomeric peaks of ethyl mandelate separation on columns prepared from different batches being less than 1.09 % and 5.75 %， respectively. This study indicates that BINOL-CPM is a promising chiral separation material for HPLC and has good research significance and value. It also provides a reference for the development of novel HPLC CSP. Table and Figures | Reference | Supplementary Material | Related Articles | Metrics