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Design， Synthesis and Fungicidal Activity of Pyrazinamide Analogs WANG Gang, LIANG Shuang, SHAN Zhonggang, YING Junwu, LYU Liang, LI Bin, YANG Huibin Chem. J. Chinese Universities    2024, 45 (10): 20240369-.   DOI: 10.7503/cjcu20240369 Abstract （314）   HTML （14）    PDF（pc） （4355KB）（5467）       Knowledge map    Save Pyraziflumid was a novel pyrazinamide analog fungicide developed by Nihon Nohyaku Co. In this work， 16 pyrazinamide analogs were synthesized using substituted pyrazine acid and 2-methyl-3-nitrophenol as initial materials through 4 steps. The structures of the target compounds were confirmed by nuclear magnetic resonance （1H NMR， 13C NMR） and high resolution mass spectrometer（HRMS）. The results of fungicidal activity at greenhouse showed that pyrazinamide analogs had excellent fungicidal activities against corn rust at 6.25 mg/L. Among them， the fungicidal activities of compounds 4， 5， 7， 8， 15 and 16 against corn rust at 6.25 mg/L were 100%. Molecular docking simulations revealed that compound 16 interacted with TRP-173 of succinate dehydrogenase（SDH） through hydrogen bonding， which could explain the probable mechanism of action between compound 16 and the target protein. These results indicated that compound 16 might be a promising fungicide candidate and provide valuable reference for further investigation. Table and Figures | Reference | Related Articles | Metrics

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Cover and Content of Chemical Journal of Chinese Universities Vol.44 No.6(2023) Chem. J. Chinese Universities    2023, 44 (6): 1-6.   Abstract （261）      PDF（pc） （53746KB）（2113）       Knowledge map    Save Related Articles | Metrics

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Green Electrosynthesis Reaction of Potassium Azotetrazolium Salt Coupled by Hydrogen Production from Water Electrolysis by WS2 Nano Sheets YAO Tianhao, MA Yuhe, LIU Bolong, MA Yuqiang, ZHANG Cong, LI Jiachen, MA Haixia Chem. J. Chinese Universities    2023, 44 (12): 20230347-.   DOI: 10.7503/cjcu20230347 Abstract （459）   HTML （9）    PDF（pc） （5908KB）（1916）       Knowledge map    Save As a four-electron multi-step reaction process with sluggish kinetics， oxygen evolution reaction（OER） limits the reaction rate and reduces the overall efficiency of overall water splitting. Replacing OER with the oxidation reaction of thermodynamically more favorable organic energetic materials and coupling with hydrogen evolution reaction（HER）， so that the high value-added chemical products can be obtained while reducing the overall cell voltage to generate hydrogen. In this paper， a novel coupling system was proposed， in which the energy-containing ionic salt， potassium azotetrazolium salt（K2AZT）， was prepared on the anode side， and carbon cloth-supported tungsten disulfide nanosheets（CC@WS2 NSs） were used as HER catalyst to promote the HER on the cathode side. The system only requires a cell voltage of 1.65 V to achieve a current density of 10 mA/cm 2， which is 220 mV lower than that of conventional electrolyzed water（1.87 V）. In addition， the coupled system maintained smooth operation for at least 15 h， showing excellent stability. At the same time， the preparation of energetic compounds by green and safe electrochemical method avoids the problems of high energy consumption， high risk and high cost of traditional organic synthesis method， and provides a new synthesis strategy for the safe production of energetic materials. 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 （810）   HTML （21）    PDF（pc） （1100KB）（1441）       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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有机太阳能电池专刊 李永舫, 陈红征, 朱晓张, 何凤 Chem. J. Chinese Universities    2023, 44 (9): 1-4.   Abstract （460）      PDF（pc） （1427KB）（1433）       Knowledge map    Save Related Articles | Metrics

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Efficient Oil-water Separation at the g-C3N4/TiO2-PVDF Photoresponsive Membrane Interface： Permeability and Selectivity Differences Induced by Different Exposed Crystal Planes and Performance ZU Peng, YUAN Pengcheng, WANG Shuguang, SUN Xuefei Chem. J. Chinese Universities    2023, 44 (6): 20230085-.   DOI: 10.7503/cjcu20230085 Abstract （392）   HTML （7）    PDF（pc） （7812KB）（1245）       Knowledge map    Save Membrane technology is constrained by membrane fouling of oil droplet obstruction in oil-water separation. A crucial step toward effective oil-water separation is the construction of a functional interface for selective separation of the oil-water mixture. In this paper， g-C3N4/TiO2-PVDF（polyvinglidene fluoride） photocatalytic membranes with different exposed crystal planes of TiO2 were prepared， and the effects of different exposed crystal planes on oil-water separation were studied. The experimental results show that the TiO2（001） surface endows the g-C3N4/ TiO2（001）-PVDF membrane with excellent superhydrophilicity and underwater superoleophobicsuperoil transport properties under sunlight irradiation， and compared with the TiO2（101） surface exposed membrane， g-C3N4/ TiO2（001）-PVDF membrane has better oil-water separation performance. Under visible light， the pure water flux of g-C3N4/TiO2（001）-PVDF membrane reaches 2002.9 L·m‒2·h‒1， which is 60.8% higher than that of g-C3N4/TiO2（101）- PVDF membrane， and 47.1% higher than that under dark conditions. Simultaneously， the rejection efficiency of the five kinds of oil substances is more than 99%， and the high permeation flux of 420.4—665.2 L·m‒2·h‒1 is maintained. The highest rejection efficiency of g-C3N4/TiO2（101）-PVDF membrane is only 61.8%， and the permeation flux is less than 200 L·m‒2·h‒1. The mechanism of different crystal planes was explored by transient photocurrent response and electron paramagnetic resonance technology. The results showed that the g-C3N4/TiO2（001）-PVDF membrane had a stronger light response current and more hydroxyl radical production. The permeation flux of g-C3N4/TiO2（001）-PVDF membrane was still 264 L·m‒2·h‒1 after a 360 min continuous experiment. High rejection efficiency and permeation flux were always maintained in the 8 cycles of regeneration experiments. Obviously， the photocatalytic membrane with exposed TiO2（001） has a greater permeability， selectivity， and stability， which is more appropriate for the effective separation of oil-water wastewater. Table and Figures | Reference | Related Articles | Metrics

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Split Intein： a Versatile Tool for Traceless Peptide Segment Ligation HAN Dongyang, REN Yuxiang, YANG Ziyi, HUANG He, ZHENG Jishen Chem. J. Chinese Universities    2023, 44 (10): 20230188-.   DOI: 10.7503/cjcu20230188 Abstract （992）   HTML （53）    PDF（pc） （5394KB）（1155）       Knowledge map    Save Split intein can efficiently ligate peptide segments via a splicing reaction in a traceless manner and therefore has attracted great attention. Based on the structural characteristics and splicing reaction process of split intein， this paper comprehensively reviewed the recent progresses on the performance optimization and expanded applications of split intein， and revealed its great potential in the field of chemical protein synthesis as an increasingly sophisticated protein engineering technology. Finally， the challenges presented in the split intein- mediated protein trans-splicing and potential solutions in the future research were briefly 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 （647）   HTML （32）    PDF（pc） （7288KB）（1140）       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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First-principles Study of Direct Z-scheme In2SSe/Sb Heterostructure as Photocatalyst for Water Splitting CAO Shengzhe, HUANG Xin, YANG Zhihong Chem. J. Chinese Universities    2023, 44 (8): 20230145-.   DOI: 10.7503/cjcu20230145 Abstract （365）   HTML （11）    PDF（pc） （5725KB）（1094）       Knowledge map    Save The photocatalytic properties of two-dimensional In2SSe/Sb van der Waals heterostructure were investi-gated via first-principles method. The results show that In2SSe/Sb heterostructure possesses the staggered band alignments with a direct band gap of 0.82 eV. As the built-in electric field is pointing from Sb to In2SSe at the interface， the In2SSe/Sb heterostructure exhibits type-Z mode， which is beneficial for effective electron-holes separations. Moreover， its band edges straddle water redox potentials and a strong optical absorption spectrum from visible light to ultraviolet light is obtained. Our study would offer theoretical understanding for designing In2SSe/Sb van der Waals heterostructure. Table and Figures | Reference | Related Articles | Metrics

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End-capped Polymer Donors for Highly-efficient Organic Solar Cells ZHANG Youhui, YANG Na, DUAN Na, CHENG Yujun, YOU Shiyong, WU Feiyan, CHEN Lie Chem. J. Chinese Universities    2023, 44 (7): 20230169-.   DOI: 10.7503/cjcu20230169 Abstract （394）   HTML （11）    PDF（pc） （7523KB）（999）       Knowledge map    Save End-capping engineering is a very simple and convenient strategy for polymer modification， whereas its application in high performance non-fullerene organic solar cells is still limited. In this paper， three novel fully end-capped donors PM6-T-EH， PM6-2T-EH and PM6-3T-EH were prepared by capped with 2-（2-ethylhexyl）-thiophene（T-EH）， 5-（2-ethylhexyl）-2，2′-bithiophene（2T-EH）， and 5-（2-ethylhexyl）-2，2′∶5′，2′′-terthiophene（3T-EH）， respectively. Compared with pristine polymer donors PM6（15.40%）， end-capped polymers PM6-T-EH， PM6-2T-EH， PM6-3T-EH blended with Y6 achieved the power conversion efficiencies（PCE） of 16.66%， 15.54% and 13.50%， respectively. It is shown that the alkyl monothiophene end-capped polymer can reduce the carrier traps， optimize the morphology and improve the charge transport in the active layer， thus enhance the overall PCE. The gradually decreased device performance along with the increase of thiophene units in end-capping groups， is mainly attributed to the deteriorated morphology of active layer， resulting from the bulky conjugated chains of the end- capping groups. Further optimizing the active layer， the device based on PM6-T-EH∶BTP-eC9 achieved a highe efficiency of 18.02%. Table and Figures | Reference | Supplementary Material | Related Articles | Metrics

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Synthesis of Nanospherical Mo-MOF Materials for Catalytic Selective Oxidation of Thioethers GUO Haotian, LU Xinhuan, SUN Fanqi, TAO Yiyuan, DUAN Jingui, ZHANG Wang, ZHOU Dan, XIA Qinghua Chem. J. Chinese Universities    2023, 44 (12): 20230408-.   DOI: 10.7503/cjcu20230408 Abstract （494）   HTML （25）    PDF（pc） （9319KB）（995）       Knowledge map    Save Metal-organic framework materials are composite materials composed of inorganic metal ions and organic ligands， which have high metal dispersion and catalytic activity. In this paper， an organic framework material Mo-MOF was synthesized using molybdic acid as molybdenum source and terephthalic acid as ligand by static mixed solvothermal crystallization method. The morphology， structure and composition of the materials were characterized by X-ray diffraction（XRD）， Fourier exchange infrared spectroscopy（FTIR）， scanning electron microscopy（SEM） and X-ray photoelectron spectroscopy（XPS）. Mo-MOF catalysts synthesized by static mixed solvothermal method （water and ethanol） showed the best catalytic activity， with 100% conversion of conversion of diphenylthioether and 86.4% selectivity of diphenylsulfoxide in the selective oxidation using oxygen without other additives. 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 （912）   HTML （49）    PDF（pc） （5671KB）（987）       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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Application of 2D NMR in Organic Photovoltaics CHEN Hongru, BAI Yang, ZHOU Qiuju, ZHANG Zhiguo Chem. J. Chinese Universities    2023, 44 (7): 20230104-.   DOI: 10.7503/cjcu20230104 Abstract （368）   HTML （12）    PDF（pc） （8803KB）（949）       Knowledge map    Save Two-dimensional nuclear magnetic resonance technique（2D NMR） plays a crucial role in the structural analysis of complex organic compounds. Analyzing the correlation signals of 2D NMR spectra could help us obtain the information about intra- and inter-molecular interactions. Meanwhile， it is significant to study molecular interaction between photoactive layer materials for organic photovoltaics. Such interaction can help us not only analyze the aggregation behavior of molecules， but also understand the changes in the morphology and stability of the active layer upon the addition of a third component. In this review， we provide relevant introduction on the 2D NMR spectrum， and summarize the related works on the use of 2D NMR in the analyzing the interaction between molecules in organic solar cells. Finally， It offers a perspective on the future development in this technique. Table and Figures | Reference | Related Articles | Metrics

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Hydrogel-based Bioinspired Ion Channels： Fabrication and Controllable Ion Transport CHEN Weipeng, KONG Xiangyu, WEN Liping Chem. J. Chinese Universities    2023, 44 (6): 20220772-.   DOI: 10.7503/cjcu20220772 Abstract （1108）   HTML （58）    PDF（pc） （14959KB）（946）       Knowledge map    Save The controllable ion transport is the basis of most physiological activities， such as the transmission of neural signals， the perception of external stimuli， etc. The key to realize the controllable ion transport is the various protein ion channels in life system. Inspiring researchers endeavor to develop artificial ion channels to subtly tune the ion transportation. Among the developed ion channels， hydrogel-based system exhibits the advantages of high ion selectivity and high ion conductance due to its three-dimensional（3D） charged networks induced space charges and 3D interconnection channels. As hydrogel-based ion channels hold the biocompatibility， deformability， and stable ion storage properties， it has been the focus in intelligence ion transport field and shows great potential in ion electronic circuits， medical health， energy conversion and storage， resources， and environment. To summarize the latest development of the hydrogel-based ion channels， we firstly overview on the construction methods of hydrogel-based intelligent ion channels. Thereafter， the ion transport mechanisms in the hydrogel-based ion channels are summarized， and the applications of such ion channels are categorized. At last， we discuss the existed issues and give the perspective on future development of hydrogel-based ion channels. 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 （271）   HTML （14）    PDF（pc） （3974KB）（942）       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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Development of Nucleic Acid-mediated Nanomaterials and Their Applications HAO Qiangjun, YE Zi, WEN Bei, PENG Hanyong Chem. J. Chinese Universities    2023, 44 (10): 20230125-.   DOI: 10.7503/cjcu20230125 Abstract （473）   HTML （19）    PDF（pc） （7152KB）（906）       Knowledge map    Save Nucleic acid is a powerful building block for functional nanomaterials with extensive physiological function and structural potential. It’s an ideal template to mediate the growth of metal nanoparticles， precisely controlling their size， structure and morphology. In this review， we introduced the mechanism of interaction between nucleic acid and metal ions， and reviewed the methods for synthesizing nanomaterials using the nucleic acid templates. The unique properties of nucleic acid mediated nanoparticles enable their broad application in molecule diagnosis， cell imaging， catalytic degradation， drug delivery and therapy. It provides a new strategy to improve the design and construction of functional nanomaterials and explore their application. 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 （293）   HTML （15）    PDF（pc） （5514KB）（886）       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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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 （343）   HTML （31）    PDF（pc） （2629KB）（836）       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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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 （354）   HTML （14）    PDF（pc） （7096KB）（833）       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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Performance and Mechanism of Graphene-carbon Felt Composited Gas Diffusion Cathode for Hydrogen Peroxide Electrochemical Production HU Hongsu, SHEN Chuanzhe, WANG Yuhang, WANG Qingqing, HE Shilong, LI Peng Chem. J. Chinese Universities    2023, 44 (11): 20230245-.   DOI: 10.7503/cjcu20230245 Abstract （347）   HTML （7）    PDF（pc） （2820KB）（825）       Knowledge map    Save Graphene and Ketjen black composite carbon felt gas diffusion cathodes were prepared by impregnation-sintering by adjusting the amount of anhydrous ethanol， the mass ratio of graphene to polytetrafluoroethylene （PTFE）， sintering temperature and other factors during method， and their microstructure and H2O2 electrochemical catalytic performance were compared. Due to the scaly microstructure and abundant oxygen-containing functional groups， graphene-carbon felt composite cathode has higher H2O2 yield than Ketjen black-carbon felt composite cathode. The H2O2 catalytic performance of graphene-carbon felt composite cathode was improved by regulating the preparation process， and the response mechanism of different manufacture parameters on the H2O2 catalytic performance of graphene-carbon felt composite cathode was studied by means of linear sweep voltammetry（LSV）， electrochemical impedance spectroscopy（EIS）， Fourier transform infrared spectroscopy（FTIR）， X-ray photo- electron spectroscopy（XPS） and other testing methods. The research results show that when the addition amount of anhydrous ethanol is 60 mL， the mass ratio of graphene to PTFE is 3∶1， and the sintering temperature is 360 ℃， the prepared cathode has high conductivity and high surface C=O functional group content. After 90 min of electro-chemical reaction， the cumulative concentration of H2O2 can reach 427.63 mg/L. This cathode has strong cycling stability and high H2O2 generation efficiency， which has significant advantages over the widely used carbon black/ PTFE cathode. It is anticipated that this work could provide a theoretical basis and technical method reference for the efficient electrochemical production of H2O2 of gas diffusion cathodes based on graphene. Table and Figures | Reference | Supplementary Material | Related Articles | Metrics