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Self-Assembly Ultrathin Films Based On Dendrimers WANG Jin-Feng, JIA Xin-Ru, LI Ying, ZHONG Hong, CHEN Jin-Yu, LUO Guo-Bin, LI Ming-Qian, WEI Yen Chem. J. Chinese Universities    2001, 22 (10): 1773-1775.   Abstract （1598）      PDF（pc） （1079KB）（7297）       Knowledge map    Save An ultrathin film with forth generation poly(aminoamine)(PAMAM) dendrimers (methyl quaternary ammonium salt) as polycation and poly(sodium p styrenesulfonate) (PSS) as polyainon was fabricated via sequential deposition. It shows that the step by step depositions carried out smoothly by monitoring with UV Vis spectrometer. The multilayer film is rather flat with a mean roughness of 0.39 nm determined by AFM. The average thickness of a bilayer is 5.0 nm obtained from XRD, which indicates that the dendrimers molecules were compressed and possess high flattening. Related Articles | Metrics

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The Synthesis and Crystal Structure of a Trigonal-Planar Complex of Zinc [Bu4N][Zn(SC6H2Pr3i-2,4,6)3]·PriOH TANG Ka-luo, LI Ai-qun, JIN Xiang-lin, TANG You-qi Chem. J. Chinese Universities    1992, 13 (4): 441-442.   Abstract （2742）      PDF（pc） （154KB）（2097）       Knowledge map    Save The title complex was prepared and structurally characterized.The crystal belongs to space group P21/c, a= 1.4335(8) nm, b=2.4389(16) nm, c = 2.0556(12)nm, β=105.91 (5)°, V=6.911(7) nm3, Dc ==1.031 g/cm3 for Z = 4,R=0.076.Rw = 0.072 for 3846 reflections.The zinc is trigonal-planar coordinate.The average Zn-S bond length is 0.246 nm. Related Articles | Metrics

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Molecular Stacking and Device Performance： Recent Advances of Efficient Small Molecule Donors Based on Benzodithiophene and Its Derivatives YANG Ke, XIAO Zeyun, LU Shirong, SUN Kuan Chem. J. Chinese Universities    2023, 44 (9): 20230123-.   DOI: 10.7503/cjcu20230123 Abstract （563）   HTML （20）    PDF（pc） （7096KB）（4424）       Knowledge map    Save The rapid development of all-small-molecule solar cell has recently gained recognition within the photovoltaic research community. Well-defined structure and less batch-to-batch variation empowered it great application prospects. In this perspective， we review the development of small molecule donors based on benzodithiophene（BDT） and its derivatives， with a focus on the relationship between molecule structure， stacking characteristics and device performance. By analyzing successful cases in the BDT series of small molecules， we aim to clarify the link between molecule structure， solid-state aggregation and device performance. We hope this discussion can be the minnow to catch the whale of highly efficient molecules in the future. Table and Figures | Reference | Related Articles | Metrics

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Multi-stage Thermal Decomposition Mechanism of Energetic Plasticizer DNTN Triggered by Cleavage of the Nitrate Ester Bond CAO Huawen, TANG Qiufan, QU Bei, HUO Huan, ZHENG Qilong, CAO Yilin, LI Jizhen Chem. J. Chinese Universities    2024, 45 (2): 20230398-.   DOI: 10.7503/cjcu20230398 Abstract （817）   HTML （16）    PDF（pc） （5514KB）（1939）       Knowledge map    Save 2，3-Bis（hydroxymethyl）-2，3-dinitro-1，4-butanediol tetranitrate（DNTN） is energetic material， which is the densest nitrate. The unclear thermal decomposition mechanism of DNTN has seriously hindered its application in propellants. The thermal decomposition process of DNTN was investigated by a combination of reactive force field molecular dynamics（ReaxFF MD） simulation， solid-phase in situ infrared spectroscopy（in situ IR） and TG-DSC- FTIR-MS simultaneous techniques， and the gas and solid products of the thermal decomposition were analysed， the thermal decomposition mechanism was elucidated. The results showed that the decomposition of DNTN was revealed that the process occurred in three stages. During the first stage from 127 ℃ to 147 ℃， the O—N bond in DNTN was partially broken， releasing a minor amount of NO2 gas. In the second stage， between 147 ℃ and 220 ℃， DNTN underwent rapid decomposition， removing the nitro groups and decomposing the quaternary carbon skeleton， accompanied by the formation and cleavage of the microcyclic structure， releasing a large amount of gases such as NO2 and CO2， and at the same time emitting a large amount of heat. The third stage， taking place within the temperature range of 240—350 ℃， involved the high temperature pyrolysis of the remaining solid product of DNTN， which resulted in a limited release of CO2 gas， and above 300 ℃， the remaining solid phase material would further react to result in the production of cyano. In this paper， the thermal decomposition mechanism of DNTN was illustrated from a multistage perspective， which had important guiding significance for its application in propellants and the follow-up research on stability mechanism. Table and Figures | Reference | Supplementary Material | Related Articles | Metrics

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Rapid Grafting of Phenylboronic Acid with Hydroxypropyl Chitosan Mediated by HATU LI Aoqi, HU Chuanzhi, SHI Han, DENG Mingyu, XIAO Bo, JIANG Bo Chem. J. Chinese Universities    2023, 44 (6): 20220698-.   DOI: 10.7503/cjcu20220698 Abstract （1215）   HTML （48）    PDF（pc） （1100KB）（5195）       Knowledge map    Save Phenylboronic acid（PBA） can form reversible covalent bonds with cis-1，2-diol or 1，3-diol in an aqueous solution， which makes it useful as the glucose-responsive units or dynamic cross-linking groups in nano/hydrogels. In this paper， PBA was efficiently grafted on hydroxypropyl chitosan（HPCS） by employing 2-（7-azabenzotriazol-1-yl）- N，N，N'，N'-tetramethyluronium hexafluorophosphate（HATU） as a coupling reagent in dimethyl sulfoxide（DMSO）. The resulting carboxyphenylboronic acid-grafted hydroxypropyl chitosan（CPBA-HPCS） was soluble when pH>8.5， and the structure was characterized and confirmed by Fourier-transform infrared spectroscopy（FTIR） and nuclear magnetic resonance（NMR）. In addition， the kinetics of the reaction were studied and a series of CPBA-HPCS with different substitution degrees（up to 0.78） was prepared. This novel chitosan derivative has good application prospects in the preparation of smart hydrogels and drug carriers. Table and Figures | Reference | Related Articles | Metrics

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Research on Co3O4/UiO-66@α-Al2O3 Ceramic Membrane Separation and Catalytic Spraying Industry VOCs Waste Gas JIANG Hongbin, DAI Wenchen, ZHANG Rao, XU Xiaochen, CHEN Jie, YANG Guang, YANG Fenglin Chem. J. Chinese Universities    2022, 43 (6): 20220025-.   DOI: 10.7503/cjcu20220025 Abstract （505）   HTML （11）    PDF（pc） （7193KB）（2064）       Knowledge map    Save Co3O4/UiO-66@α-Al2O3 ceramic membranes were constructed with α-Al2O3 as the support layer， UiO-66 as the separation layer， and Co3O4 as the catalytic layer. The ceramic membrane exhibits outstanding separation performance of benzene/pyridine. The molar concentration ratio of pyridine to benzene in the gas on the permeate side can be increased from 1 to 17 on the feed side. After O3 was introduced into the system， the concentration of benzene on the feed side was significantly reduced， and its removal rate can reach 89%. The removal rate of pyridine on the permeate side was only 27%， which was retained to a large extent， and the remaining pyridine could be collected for separate advanced treatment. The Co3O4/UiO-66@α-Al2O3 ceramic membrane can effectively solve the emission problem of nitrogen oxides in the waste gas treatment process of the spraying industry， and is expected to be an ideal choice for the waste gas pretreatment process of the spraying industry. Table and Figures | Reference | Related Articles | Metrics

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Fe-N co-Doped Carbon Quantum Dots as Highly Active Peroxidase Mimics for Colorimetric Detection of Chlorogenic Acid ZHANG Min, ZHANG Wenhao, LI Guangying, WANG Limin, SHAN Guiye Chem. J. Chinese Universities    2026, 47 (2): 20250289-.   DOI: 10.7503/cjcu20250289 Abstract （141）   HTML （5）    PDF（pc） （3192KB）（505）       Knowledge map    Save Fe-N-CDs nanopaticles were successfully prepared by one-step hydrothermal method using L-histidine and Fersulfate heptahydrate（FeSO₄·7H₂O） as precursors. The introduction of Fe atoms produced more active sites on the surface of carbon dots， promoted the electron transfer in the catalytic process， and thus improved the catalytic efficiency of the material. The Fe-N-CDs nanopaticles effectively catalyzed the decomposition of hydrogen peroxide （H2O2） to generate hydroxyl radicals（•OH）， which subsequently oxidized 3，3'，5，5'-tetramethylbenzidine（TMB） to form a blue oxidation product（oxTMB） with a characteristic absorption peak at 652 nm. Curcumin， a natural polyphenolic compound widely found in plants， exhibits excellent antioxidant properties and antidepressant effects. Leveraging the ability of curcumin to reduce oxTMB and cause its color to fade， a quantitative relationship between the change in absorbance and the curcumin content was established. This enabled the development of a colorimetric sensing method for the detection of curcumin. The experimental results demonstrated that this method possesses good selectivity， anti-interference capability and rapid response characteristics. It can be applied for the colorimetric analysis of antioxidant components in pharmaceuticals and food products， offering a new analytical approach for quality assessment of related products and the development of antidepressant drugs. Table and Figures | Reference | Related Articles | Metrics

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CO2-involved Electrochemical C—N Coupling into Value-added Chemicals WANG Ruhan, JIA Shunhan, WU Limin, SUN Xiaofu, HAN Buxing Chem. J. Chinese Universities    2022, 43 (7): 20220395-.   DOI: 10.7503/cjcu20220395 Abstract （841）   HTML （32）    PDF（pc） （5957KB）（2637）       Knowledge map    Save CO2 is the main greenhouse gas and an important C1 resource. C—N bonds formation plays an important role in chemical industry， biosynthesis and medicine. In recent years， with the deepening of carbon neutrality and green chemistry concept， the strategy of electrochemical C—N bonds construction has attracted much attention due to its advantages of environmental benign， low carbon， simplicity and green. At the same time， continuous consumption of fossil resource results in a series of environmental and resource problems， and the green sustainable synthesis of important chemicals and fuels is attracting increasing attention. This paper focuses on the research progress of CO2-involved electrochemical C—N formation to prepare important chemicals. The electrochemical synthesis of urea， amide and amine are reviewed from the perspectives of catalytic system construction， reaction processes， and reaction mechanism. Finally， the critical challenges remaining in this research area and promising directions for future research are discussed. 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 （448）   HTML （11）    PDF（pc） （7683KB）（528）       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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Solvent Effect on the Catalytic Performance of Cinnamaldehyde Hydrogenation over Pt/MIL-100（Fe） CAI Jiani, LIU Yingya, SUN Zhichao, WANG Yao, WANG Anjie Chem. J. Chinese Universities    2024, 45 (2): 20230442-.   DOI: 10.7503/cjcu20230442 Abstract （560）   HTML （16）    PDF（pc） （3974KB）（2890）       Knowledge map    Save This study employs an environmentally-friendly method to synthesize MIL-100（Fe）， and utilizes a double-solvent impregnation approach to confine Pt nanoparticles within the pores of MIL-100（Fe）， subsequent to acidification with HCl and reduction with formaldehyde， a bifunctional catalyst， Pt/MIL-100（Fe）， featuring hydrogenation and Lewis acid centers， is prepared. The catalytic performance is evaluated using the selective hydrogenation of cinnamaldehyde（CAL） as a probe reaction. Under optimal conditions（60 ℃， 1 MPa H2）， the conversion of CAL reaches 88.3% in 2 h， with a cinnamyl alcohol（COL） selectivity of 84.9%. By comparing the reaction performance of Pt/MIL-100 catalysts with Cr， Al and Fe metal centers， it is revealed that the Fe center favors for the hydrogenation of C=O bonds in both CAL to COL and furfural to furfuryl alcohol. The impact of water content in the reaction system on the selective hydrogenation of CAL is extensively studied. Characterization and static adsorption experiments indicate that removal of free water from the pores of Pt/MIL-100（Fe） facilitates direct enrichment of CAL in the channels， leading to an enhanced conversion. Additionally， removal of coordinated water from the Fe cluster promotes the adsorption of the C=O group of CAL， resulting in an improved selectivity toward COL. After five catalytic cycles under optimal conditions， Pt/MIL-100（Fe） maintains the catalytic performance. Results of powder X-ray diffraction （XRD）， transmission electron microscopy （TEM）， and low-temperature nitrogen adsorption characterization confirm the stability of the catalyst structure after reaction. Table and Figures | Reference | Supplementary Material | Related Articles | Metrics

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Construction of Mn-Cu Bimetal Containing Phyllosilicate Nanozyme and Evaluation of the Enzyme-like Properties HE Beibei, YANG Kuihua, LYU Rui Chem. J. Chinese Universities    2022, 43 (8): 20220150-.   DOI: 10.7503/cjcu20220150 Abstract （879）   HTML （19）    PDF（pc） （5964KB）（1291）       Knowledge map    Save A Mn-Cu containing bimetallic phyllosilicate（AMCP） was prepared by one-pot sol-gel method， which was verified to present intrinsic laccase-like and peroxidase-like performance. The results indicated that AMCP presented a well confined 2-dimentional layered structure， and the varied valence states arose from Mn and Cu endow it with excellent enzyme-mimetic activities. Moreover， it exhibits superior pH and temperature tolerance comparing with natural analogue， when the temperature was higher than 70 ℃， AMCP retained above 80% activity while natural enzyme was completely deactivated. Besides， it also remained around 90% activity under pH value of 3—9. Finally， the catalytic mechanism indicated the electron transfer between Mn and Cu accelerated the cycle of Cu2+ and Cu+， which could promote the production of ROS and facilitate the catalytic performance of AMCP. This work provides a novel strategy and direction for the customization of high performance， multi-enzyme mimetic nanozyme， which has a potential application prospect on biosensing， disease therapy and environmental remediation. Table and Figures | Reference | Supplementary Material | Related Articles | Metrics

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High-efficiency Near-infrared Thermally Activated Delayed Fluorescence Based on Tetracyano Acceptor WANG Xiaojing, LIU Yixia, LI Yang, YANG Chenzong, FUNG Mankeung, FAN Jian Chem. J. Chinese Universities    2023, 44 (12): 20230274-.   DOI: 10.7503/cjcu20230274 Abstract （579）   HTML （37）    PDF（pc） （2629KB）（2343）       Knowledge map    Save The near-infrared thermally activated delayed fluorescence（TADF） material 11，12-bis［4-（diphenyla- min）phenyl］dipyrido［3，2-a：2'，3'-c］phenazine-3，6，10，13-tetracarbonitrile（FCNPZ-TPA） was designed and synthesized with dipyridinophenazine as the acceptor unit and triphenylamine（TPA） as the donor unit. The introduction of four cyano groups into the acceptor unit increased its electron-withdrawing strength. Considering that tripheny-lamine is a strong electron-donating group， we successfully pushed the emission of FCNPZ-TPA into Near Infra（NIR） region via the incorporation of strong donor and strong acceptor. The steric hindrance between donor（D） and acceptor（A） led to a twisted D-A molecular configuration of FCNPZ-TPA， and thus achieving a small singlet-triplet energy gap（ΔEST）. Due to the rigid molecular skeleton and small ΔEST， FCNPZ-TPA based organic light-emitting diode（OLED） exhibited a state-of-the-art maximum external quantum efficiency（EQE） of 8.01% at 742 nm when doped in the 4，4'-bis（N-carbazolyl）-1，1'-biphenyl. Table and Figures | Reference | Related Articles | Metrics

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Functions of Plant RNA Modifications and Their Analytical Methods TANG Xiaomeng, YUAN Bifeng, FENG Yuqi Chem. J. Chinese Universities    2023, 44 (3): 20220265-.   DOI: 10.7503/cjcu20220265 Abstract （762）   HTML （26）    PDF（pc） （3104KB）（3737）       Knowledge map    Save Apart from the canonical nucleobases， RNA molecules contain a variety of chemical modifications. So far， over 150 different types of RNA modifications have been identified in the three-domain system of life. These chemical modifications do not alter the sequence of RNA， but they can change the structures and biochemical properties of RNA， which thereby can control and regulate the spatiotemporal expression of genes. As an important epigenetic regulation layer， RNA modifications also play crucial roles in regulating plant growth and development and respond to stresses. In recent years， with the rapid advancement of analytical methods， especially the technologies for RNA modification sequencing， the functions and mechanisms of plant RNA modifications have gained in-depth understanding. In the current review， we introduce the functions of plant RNA modifications and summarize the analytical methods for plant RNA modifications. We believe that this review will provide useful information for the systematic study of plant RNA modifications in the future. Table and Figures | Reference | Related Articles | Metrics

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Design and Applications of Hypoxia Optical Probes LI Cheng, ZHOU Sensen, JIANG Xiqun Chem. J. Chinese Universities    2022, 43 (12): 20220558-.   DOI: 10.7503/cjcu20220558 Abstract （651）   HTML （9）    PDF（pc） （9138KB）（1409）       Knowledge map    Save Oxygen plays an important role in life activities and provides an important source of energy for aerobic organisms. Insufficient oxygen supply will lead to tissue hypoxia. Hypoxia is often closely related to inflammation， chronic wounds， tumors and other diseases， and tissue oxygen concentration is also an important basis for evaluating body health. The enormous advantages of optical imaging in terms of spatial resolution， sensitivity and cost-effectiveness make it an important imaging diagnostic tool for inflammation， cancer， brain diseases， and surgical navigation. In this review， we introduce the synthesis strategies of several hypoxia-responsive optical probes and illustrate the applications of different hypoxia optical probes in tumor detection， inflammation monitoring， wound oxygen content imaging， treatment response monitoring and food packaging. Finally， we discussed the application prospect of hypoxia optical imaging. Table and Figures | Reference | Related Articles | Metrics

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Progress on the Recognition， Complex Structure and Intracellular Detection of Nucleic Acid G-quadruplex LIU Wenting, LIU Liuyi, ZHU Bochen, MAO Zongwan Chem. J. Chinese Universities    2023, 44 (3): 20220419-.   DOI: 10.7503/cjcu20220419 Abstract （1454）   HTML （64）    PDF（pc） （7527KB）（1266）       Knowledge map    Save DNA or RNA guanine-rich sequences can form non-canonical secondary structures known as G-quadruplexes. The structures of G-quadruplex are rich and diverse， and they exist dynamically in organisms. G-quadruplex is involved in key genomic functions such as transcription， replication， genomic stability and epigenetic regulation and is closely related to cancer biology. The studies on the structural and functional mechanisms of G-quadruplex have promoted G-quadruplex-targeted tumor intervention and treatment. This paper reviews the specific recognition， cell detection and biological functional regulation of G-quadruplex， summarizes the research progress in designing small molecules recognizing and targeting of G-quadruplex and their complex structures. The possibility of G-quadruplex-targeted intervention and disease treatment is discussed. Finally， the challenges and opportunities in the future research of G-quadruplex field are prospected. Table and Figures | Reference | Related Articles | Metrics

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MOFs-based Microfluidic Chips for Real-time Online Determination of Multiple Heavy Metal Ions CHEN Xiaoping, WANG Xutan, LIU Ning, WANG Qingxiang, NI Jiancong, YANG Weiqiang, LIN Zhenyu Chem. J. Chinese Universities    2024, 45 (2): 20230395-.   DOI: 10.7503/cjcu20230395 Abstract （1392）   HTML （58）    PDF（pc） （5671KB）（1877）       Knowledge map    Save This study combines the accumulation effects of rich microporous ZIF-8 metal-organic framework（MOF） and the electrochemical technology for the metal ions， and the controllable ability of microfluidic devices for the flowing of solution， to construct a new type of sensor to achieve high-throughput， real-time and rapid detection of multiple metal ion contaminations in the environment. The developed ZIF-8-Nafion/ITO-based microfluidic electrochemical sensors have a good linear relationship for Cd2+， Pb2+ and Hg2+ ions in the concentration range of 0.1—100 μmol/L with the detection limit of 0.055， 0.0025 and 0.0016 μmol/L， respectively（S/N=3）. The microfluidic chips require less sample volume which reduces energy consumption； at the same time， the microfluidic devices made up of polydimethylsiloxane are also expected to realize the function of flexible electrodes， which is important for the integrated and automatic detection of biological and environmental samples using portable and flexible electro- chemical devices. Table and Figures | Reference | Supplementary Material | Related Articles | Metrics

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Synthesis and Photocatalytic Degradation Activity of Two Inorganic-organic Hybrids Based on Keggin-type Heteropolyacids ZHAO Xue, ZHANG Ange, TIAN Hongrui, WANG Henan, HUO Haiyan, LIU Shuxia Chem. J. Chinese Universities    2021, 42 (6): 1723-1729.   DOI: 10.7503/cjcu20200845 Abstract （961）   HTML （45）    PDF（pc） （1886KB）（1928）       Knowledge map    Save Two inorganic-organic hybrids based on Keggin-type heteropolyacids with the chemical formula ｛［Cu2（4，4′-bipy）4（H2O）4］（SiMo12O40）·18H2O｝n（1） and ｛［Cu2（4，4′-bipy）4（H2O）4］（PMo6W6O40）·18H2O ｝n（2）（bipy=bipyridine） were prepared. The single crystal X-ray analysis shows that the two compounds are isostructural， in which the Cu2+ is six-coordinated， ligated by four N atoms from four 4，4′-bipy and two O atoms from the two water molecules， forming a 2D cation layer ［Cu（4，4′-bipy）2（H2O）2］n2n+. Keggin-type heteropolyanions are arranged between the 2D cation layers by electrostatic interaction with coordination cations ［Cu（4，4′-bipy）2（H2O）2］n2n+. These compounds are characterized by infrared spectroscopy， powder X-ray diffraction and solid ultraviolet-visible diffuse reflectance spectroscopy. The degradation activity of synthetic compounds on the water-soluble dye methylene blue was researched. The experimental results indicate that the two compounds exhibit significant photodegradation activity for methylene blue， and the catalytic mechanism is discussed. Table and Figures | Reference | Related Articles | Metrics

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Construction and Application of Polylysine Peptide Modified Gelatin Multifunctional Hydrogel JIANG Yunjing, HUANG Tongdai, CAO Yuyu, BAI Rongxian, WU Jie, WANG Zuxi, SUN Hongmei Chem. J. Chinese Universities    2024, 45 (1): 20230312-.   DOI: 10.7503/cjcu20230312 Abstract （998）   HTML （35）    PDF（pc） （7288KB）（2280）       Knowledge map    Save The ε-polylysine（EPL） antibacterial peptide was grafted onto gelatin to synthesize EPL-modified gelatin（GEL-E）， afterwards， a multifunctional hydrogel， GEL-E/CMC/OCS hydrogel， with injectable， self-healing and antibacterial properties was prepared using GEL-E， carboxymethyl chitosan（CMC） and chondroitin oxysulfate（OCS）.The experimental results showed that the hydrogel prepared has high energy storage modulus， elastic deformation， self-healing， injectable and antibacterial properties. Dipotassium glycyrrhizinate（DG） was loaded into hydrogel， which endowed the hydrogel with anti-inflammatory properties and wound healing ability. The results showed that the drug release rate could reach 100%. Meanwhile， the cell compatibility and the ability of promoting cell migration were evaluated， the results showed that the hydrogels presented very low cytotoxicity and could promote cell migration. All the above results indicated that the GEL-E/CMC/OCS hydrogel has good mechanical properties， biocompatibility and ability to promote cell migration， and has broad application prospects in the field of promoting wound healing. Table and Figures | Reference | Supplementary Material | Related Articles | Metrics

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Research Progress of Bacterial Infection Imaging ZHANG Yaqing, LI Linyao, HAO Mengqi, LUO Qin, DENG Siyu, YANG Yun, LIANG Xuewei, FANG Weiwei, SONG Erqun Chem. J. Chinese Universities    2021, 42 (11): 3265-3276.   DOI: 10.7503/cjcu20210461 Abstract （1306）   HTML （57）    PDF（pc） （2095KB）（610）       Knowledge map    Save As one of the major causes for death， bacterial infection is caused by pathogenic bacteria or opportunistic pathogens that invade the human body and proliferate， producing toxins and other metabolites. Early diagnosis of infectious diseases is an important approach to effective treatment and control of infectious diseases. The rapid development of molecular imaging technology has brought unprecedented changes and opportunities to the evaluation of bacterial infection in vivo. This article reviews the research progress and the future development direction of imaging of bacterial infection in vivo based on the imaging methods such as computed tomography， ultrasound imaging， magnetic resonance imaging， fluorescence imaging， photoacoustic imaging， and others， aiming to provide reference for the development of detecting bacterial infection in vivo. Table and Figures | Reference | Related Articles | Metrics

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Application of Covalent Organic Framework-Polyoxometalates Composites in Heterogeneous Catalytic Epoxidation of Olefins KONG Xiangyu, LIAO Li, LU Canzhong, FANG Qianrong Chem. J. Chinese Universities    2023, 44 (12): 20230282-.   DOI: 10.7503/cjcu20230282 Abstract （807）   HTML （39）    PDF（pc） （3379KB）（1421）       Knowledge map    Save Covalent organic frameworks are crystalline porous materials with great application potential in heterogeneous catalysis. We synthesized a new functional covalent organic framework， COF-FL-2， using derivatives of electron-deficient naphthalene diimide（NDI） as monomers. COF-FL-2 has a large pore size and good adsorption performance. The NDI structure on the skeleton can form a stable functional composite with polyoxometalates through π-anion interaction. A novel hybrid heteropolyacid complex， PTA@COF-FL-2， was prepared by loading phosphotungstic acid（PTA） on COF-FL-2. Remarkably， PTA@COF-FL-2 shows high catalytic activity for the epoxidation of olefins with t-BuOOH as the oxidant， and can epoxidate cyclooctene and 1-octene into the corresponding epoxides under mild conditions. PTA@COF-FL-2 can be used for a long time under reaction conditions， and there is no PTA leaching phenomenon when used. In addition， PTA@COF-FL-2 is very convenient to recycle and can be recycled many times. Table and Figures | Reference | Related Articles | Metrics