Table of Content

10 July 2024, Volume 45 Issue 7

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Cover and Content of Chemical Journal of Chinese Universities Vol.45 No.7(2024)

2024, 45(7):  1-6. 

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Review

Development of Nucleic Acid Isothermal Amplification Technologies for Virus Detection

XIAO Hang, WANG Xiaoyan, DENG Zhaojia, LIAO Wenjing, XIE Wenjing, PENG Hanyong

2024, 45(7):  20240139.  doi:10.7503/cjcu20240139

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Viruses play a significant role in causing human diseases， and traditional PCR techniques have been widely used for their molecular diagnosis. However， the temperature requirements of PCR limit its application in field diagnostics. To address the need for rapid on-site diagnosis， isothermal nucleic acid amplification technologies have emerged as a promising alternative. These technologies enable nucleic acid amplification at a constant temperature without the need for thermal cycling， making them more adaptable for different diagnostic settings. This comprehensive review examines the latest advancements in isothermal amplification technologies for virus detection. It covers various aspects， including viral sample collection， nucleic acid extraction， and isothermal amplification detection. The review explores the principles， key parameters， and applications of enzyme-assisted isothermal amplification， enzyme-free isothermal amplification， and cascade amplification techniques integrated with multiple systems. Furthermore， a comparison of commercially available reagent kits is provided to highlight their respective characteristics. Additionally， the review discusses the current challenges faced by isothermal nucleic acid amplification technologies in pathogen detection， such as extraction efficiency， stability， and cost， and proposes future directions to enhance the on-site diagnostic efficacy of these technologies.



Article: Inorganic Chemistry

Preparation of Silver-based Deep Eutectic Solvents and Their Application in Separation of Long-chain Olefins/Alkanes

DI Yaming, LIU Shiqing, ZHOU Haiqiang, YU Weipeng, MI Puke, MU Yuqiang, WANG Libo

2024, 45(7):  20240100.  doi:10.7503/cjcu20240100

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Deep eutectic solvents（DESs） have the advantages of simple preparation， low price， and low toxicity. They have been widely used in azeotrope separation， but are rarely used in the separation of long-chain α-olefins. Based on the complexation of silver ions and olefin double bonds， effective separation of olefins/alkanes can be achieved. In this paper， six silver-based DESs（Ag-DESs） are synthesized with three common metal silver salts as hydrogen bond acceptors（HBA）， three amide organic compounds and glycerol as hydrogen bond donors（HBD）， and are applied to the separation of long-chain α-olefins（C₈， C₁₀）. The effects of extraction temperature and silver ion concentration on the separation effect of α-olefins are explored. The Ag-DESs are characterized through infrared spectral analysis， quantum chemical geometry configuration optimization and electrostatic potential analysis. The results of gas chromatography-mass spectrometry（GC-MS） characterization show that most DESs act as an extractant that can effectively separate olefins and are selective for olefins. The selectivity to 1-octene ranges from 5.86 to 31.40， and the selectivity to 1-decene ranges from 4.78 to 15.81. The results show that the low lattice energy of silver salt and the weak complexation degree of silver ion and carbonyl group are conducive to the complexation of silver ion to olefin， so it can be more efficient to separate olefin. The separation effect is also related to the chain length of the olefin， the longer the chain length is， the weaker the double bond of the olefin and the worse the separation effect will be.



Synthesis， Crystal Structure and Catecholase Activity of Copper（II） Complexes with N，N，N⁃Tridentate Schiff Base Ligand

BAI Yize, LIU Ruiduan, LU Qiuran, ZHAO Haiyan

2024, 45(7):  20240063.  doi:10.7503/cjcu20240063

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Four complexes， ［Cu（L¹）Cl₂］（1）， ［Cu（L¹）（SCN）₂］（2）， ［Cu（L¹）bpy］（ClO₄）₂·CH₃OH（3） and ［Cu（L²）bpy］（ClO₄）₂（4）， were synthesized via the reaction of the N，N，N-tridentate Schiff base ligands， 2-［（1H-benzimidazol-2-yl-ethylimino）-^{methyl］pyridine（L1） or 2-［（1H-benzimidazol-2-yl-propylimino）-methyl］pyridine（L2） with Cu（II） salts（where bpy=2，2′-bipyridine）. The complexes were characterized by means of elemental analysis， infrared spectroscopy， powder X-ray diffraction， single-crystal X-ray diffraction， thermal gravimetric analysis and cyclic voltammetry. In the solid state， complexes 1~4 are mononuclear Cu（II） complexes and the Cu（II） ions exhibit distorted square pyramidal coordination geometry with τ values ranging from 0.088 to 0.340. Catecholase activity of the complexes has been studied using 3，5-di-tertbutyl catechol（3，5-DTBC） as model substrate， and kinetic parameters were calculated using the Michaelis-Menten model and Lineweaver-Burk plot. The results demonstrate that all complexes exhibit catecholase activity， with the catechol oxidation rates following the order of 2>3≈4>1. The oxidation rates depend on the distortion of the Cu（II） coordination environment， the bond lengths of the leaving group of Cu（II） ions and the steric hindrance of the complexes.}



Analytical Chemistry

Synthesis of Carbon Nanopolymers Based on Deep Eutectic Strategy for Simultaneous Electrochemical Detection of a Variety of Biological Small Molecules

WEI Chaoxian, LI Nansheng, PANG Yuanhao, ZHANG Yun, JIN Wenying, YUAN Yali

2024, 45(7):  20240103.  doi:10.7503/cjcu20240103

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A conductive polymer material poly（3，4-ethylene dioxythiophene）（PEDOT） was synthesized based on a deep eutectic strategy and combined with gold nanoparticles（Au NPs） to construct a novel electrochemical sensing platform to realize the simultaneous determination of a variety of small biological molecules［ascorbic acid（AA）， dopamine（DA）， uric acid（UA）］. The morphology， performance and effective area of glassy carbon electrode modified by PEDOT and Au NPs（PEDOT-Au/GCE） were characterized. The experimental results show that the modified electrode can achieve simultaneous detection of AA， DA and UA with high sensitivity and high stability， proving that the PEDOT-Au NPs complex has good electrochemical catalytic activity. Under optimal experimental conditions， the concentration and peak current value of AA， DA and UA in mixed solution show a good linear relationship in the concentration ranges of 100—1000， 50—500 and 22.5—225 μmol/L， respectively， with the separate detection limits of 21， 0.38 and 0.016 μmol/L. In addition， the electrochemical sensing platform has a high specificity for AA， DA， and UA in the presence of other active small molecules in serum. This method is applied for the recovery determination of AA， DA and UA in serum samples.



Preparation of Sulfur-containing Porous Aromatic Framework Materials and Their Dual Performance in Ultra-sensitive Detection and Simultaneous Removal of Mercury

LIU Xingyu, ZHANG Xiaojing, XIANG Tingting, CHEN Shixin, MA Shuo, SHAO Huimin, CUI Bo, XIA Chunlong, LI Yan, BU Naishun, LI Cong

2024, 45(7):  20240138.  doi:10.7503/cjcu20240138

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Hg/Hg（II） is considered to be a highly toxic heavy metal to humans， and the preparation of new materials that can detect and remove toxic Hg²⁺ simultaneously and efficiently is an important support for the control of mercury pollution. In this study， a sulfur-containing porous aromatic framework material（named LNU-19） was synthesized by Suzuki coupling reaction， and its conjugated structure and flexible thiophene-linked fragment significantly enhanced its luminescence ability， and the material had good porosity， specific surface area and high affinity chelating site（thiophene group）， realizing the dual functional application of LNU-19 to Hg²⁺. LNU-19 has excellent sensing performance such as high sensitivity， good selectivity， good visibility and real-time response， and has an adsorption capacity of 121.3 mg/g for Hg²⁺. In this study， the introduction of thiophene sites and the regulation of the skeleton structure provided a new way to optimize and improve the preparation strategy of porous aromatic frameworks.



Organic Chemistry

Phase Transfer Catalyzed Oxidation of Toluene to Benzaldehyde Using Tetrameric Quaternary Ammonium Polyoxometalates

QIAN Shu, YU Fengli, GU Xue, YUAN Bing, XIE Congxia, YU Shitao

2024, 45(7):  20240120.  doi:10.7503/cjcu20240120

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The oxidation of toluene to benzaldehyde in industrial applications typically involves toxic reagents or the generation of various difficult-to-separate byproducts. In this study， starting materials such as ethylenediamine， epichlorohydrin， and N，N-dimethyldodecylamine were used to synthesize tetrameric quaternary ammonium chloride. Subsequently， an anion exchange reaction with Keggin-type tungstovanadophosphoric heteropolyacid was conducted to prepare tetrameric quaternary ammonium polyoxometalates. These polyoxometalate catalysts were then evaluated via the oxidation of toluene to benzaldehyde using H₂O₂（30%， mass fraction） in acetonitrile. The introduction of four nucleated cations not only modulated the redox properties of the heteropolyanions but also provided the catalyst with densely packed cooperative catalytic active sites. Additionally， the resulting catalyst exhibited excellent amphiphilic phase-transfer catalytic capabilities， significantly enhancing the reaction rate and enabling easy catalyst recovery for repeated use. After seven repeated uses， the catalyst’s performance showed minimal decline， maintaining acceptable toluene conversion（40%） and benzaldehyde selectivity（75%）. Therefore， this study has developed an environmen-tally friendly process for the catalytic oxidation of hydrocarbons relevant to industry， laying a theoretical foundation for practical industrial applications.



Synthesis and Antibacterial Activities of Osthole Derivatives Containing （Hetero）arylsulfonylpiperazine

YANG Jiaqiang, WU Xuejiao, LU Zicong, CHEN Yangmi, SHE Huixian, LIU Ouling

2024, 45(7):  20240124.  doi:10.7503/cjcu20240124

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In order to obtain antibacterial candidate compounds， the strategy of pharmacophore hybridisation was adopted to optimize the structure of the previously obtained active compound. Twenty-five osthole derivatives were designed and synthesized， and confirmed by means of nuclear magnetic resonance hydrogen spectroscopy （¹H NMR）， nuclear magnetic resonance carbon spectroscopy（¹³C NMR） and elemental analysis. The antibacterial activities against S. aureus， E. coli， methicillin-resistant S. aureus（MRSA） and fluoroquinolone-resistant E. coli（FREC） were evaluated， the results showed that the minimum inhibitory concentration（MIC） of compound 4q was 0.5， 1， 2， 2 μg/mL respectively， the MIC of compound 4s was 0.25， 0.5， 1， 2 μg/mL respectively， and the MIC of compound 4u was 0.5， 2， 1， 4 μg/mL respectively. The inhibitory activities of these compounds against S. aureus were comparable to the control drug oxacillin， and superior to norfloxacin， and against E. coli， MRSA， and FREC were superior to the control drugs oxacillin and norfloxacin. The combination of （hetero）arylsulfonylpiperazine and osthole can effectively enhance antibacterial activities and expand the antibacterial spectrums.



Synthesis， Photoluminescence and Stimulus-responsiveness Properties of Bridged Fluorinated Tetraphenylethene Compounds

DONG Yiran, LI Fengjiao, MIAO Jinling, NIE Yong, LI Tianrui, XU Chunyue, LIU Wei, LIU Guangning, JIANG Xuchuan

2024, 45(7):  20240051.  doi:10.7503/cjcu20240051

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Six fluorinated bis-tetraphenylethene（bis-FTPE） compounds were synthesized through the condensation of tetraphenylethene-based formaldehyde and ethylenediamine and further reduction and then acidification. The bridging groups are imine（compounds 1 and 2）， amine（compounds 3 and 4） and quaternary ammonium salt （compounds 5 and 6） moieties， respectively. It has been found that the fluorine atom（s）， different bridging groups and substitution positions exhibit tuning effect on the luminescence properties of the compounds. The emission wavelengths of compounds 1 and 2 are essentially the same as that of the parent tetraphenylethene（TPE）， and the luminescence quantum yield of compound 2（38%） is higher than that of TPE（23%）， indicating that the bridge/ fluorination strategy can precisely maintain the emission wavelength of TPE while improving the emission intensity. Compounds 1， 2， 5 and 6 have mechanochromic luminescence properties and compounds 3 and 4 exhibit acidochromic luminescence properties. Paper strips made of compound 3 can readily distinguish hydrochloric acid， acetic acid and trifluoroacetic acid by the emission color. These results suggest that the fluorination/bridge strategy may be applied to synergistically and precisely tune the emission and stimulus-responsiveness properties of such compounds via intra- and intermolecular interactions to adjust the molecular packing and the rotations of the phenyl groups of these compounds.



Continuous Flow Liquid-phase Vialox Peptide Synthesis Using Hydrophobic Silyl Tag

LIU Hao, LIU Dongmei, SUN Haotian, XIA Chao, SU Xianbin

2024, 45(7):  20240024.  doi:10.7503/cjcu20240024

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A novel hydrophobic silyl tag bis｛4-［（tert-butyldiphenylsilyl）oxy］phenyl｝methanamine（BPPM） was proposed for rapid liquid-phase peptide synthesis under continuous flow in a microreactor. The designed continuous flow device consists of a coupling unit（micro-channel reactor）， a deprotection unit（packed-bed reactor） and a washing unit（micro-channel mixer）. In this process， a green solvent（ethyl acetate instead of N，N-dimethylace-tamide） and Cbz-protected amino acids（clean deprotection instead of piperidine Fmoc-deprotection） were used. Vialox peptide with high purity（>95% crude） was synthesized in an environmentally friendly way， with high synthesis efficiency（each amino acid per coupling<5 min）. The results are easy to scale up and provide a new strategy for large-scale green and efficient synthesis of peptides.



Physical Chemistry

Mechanism upon Conversion of Syngas Catalyzed by Single Atom Mo Supported on Graphene： Role of Carbon Component and Impact from Mo-C Interactions

KONG Xue, ZHANG Haiping, XIA Wensheng, ZHANG Qinghong, WAN Huilin

2024, 45(7):  20240038.  doi:10.7503/cjcu20240038

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The catalytic behaviors of metal for syngas conversion are related to the carbonization of the metal， however， the formed metallic carbides are of complicated composition and structures， making the identification of the active phase of the catalysts be challengeable， so it is significant to investigate the role of the carbon component of the catalysts. In this work， we studied computationally mechanisms of syngas conversion to alcohols on single atom Mo supported on pristine graphene（Mo/pri-graphene） and single-carbon vacant graphene（Mo/sv-graphene） by means of density functional theory（DFT） method to explore the regulated effect of carbon component on C—O activation. The results show that it is significantly different for mechanisms of syngas conversion on Mo/pri-graphene with weak Mo-C interactions and Mo/sv-graphene with strong Mo-C interactions. On Mo/pri-graphene the preferred pathway is CO→HCO→CH₂O→CH₃O→CH₃/CH₄， and species CH₃O is of some stability due to high activation free energy of its further transformation into CH₃/CH₄， while on Mo/sv-graphene the preferred pathway is CO→HCO→CH₂O→CH₂OH→CH₃OH/CH₃（CH₄）， and the coexistence of species CH₃OH and CH₃（CH₄） provides a possibility for the following carbon chain propagation. The activation free energy of the elementary steps of CO hydrogenation on Mo/sv-graphene is generally lower than that on Mo/pri-graphene. The reasons are the lower interactions between Mo/sv-graphene and the substrate， and the participation of the carbon component of Mo/sv-graphene during the activation/transformation of the substrate. Thus， the carbon component of catalysts can regulate（and/or take participate in） the interaction of the catalysts with the substrates， and then make an improvement on the activity and selectivity.



Research on Recycled Titanium Matrix Derived from Titanium-based Lead-acid Batteries as Titanium-based Grid Current Collector

LIU Debo, WU Yupeng, XU Keda, LIN Haibo

2024, 45(7):  20240222.  doi:10.7503/cjcu20240222

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The energy density of titanium-based lead-acid batteries can be remarkably enhanced， thereby greatly resolving the problem of the easy corrosion and softening of the positive plates that are typically observed in traditional lead-acid batteries. This also demonstrates significant commercialization potential. However， when compared with the mature recycling process of traditional lead-acid batteries and the utilization of recycled lead， the recycling method of titanium-based lead-acid batteries and the application of recycled materials become the key factors for the future application and development of these batteries. In this paper， recycled titanium-based positive and negative electrode grids derived from titanium-based lead-acid batteries were prepared. The positive electrode grid was composed of recycled titanium matrix/tin-antimony intermediate layer/lead， and the negative electrode grid was composed of recycled titanium matrix/copper/lead. The possibility of recycling applications was discussed by studying the electrochemical properties of recycled titanium matrix derived from titanium-based lead-acid batteries for grid current collectors. The results show that the discharge specific capacity of the active material based on the recycled titanium-based positive plate is 72.4 mA·h/g， and the cycle life of the corresponding battery at 0.5C100%DoD（depth of discharge） is 180 times. The discharge specific capacity of the active material based on the recycled titanium-based negative plate is 98 mA·h/g， and the corresponding battery has a cycle life of 332 times at 0.5C100%DoD. The performance of the grid and battery prepared with the recycled titanium matrix is the same as that of the pure titanium matrix. This finding provides a solid experimental basis for the recycling of the recycled titanium grid in titanium-based lead-acid batteries.



First-principles Study of Potential Applications of Monolayer GeTe in Lithium/sodium/potassium Ion Batteries

CHEN Junjie, ZHANG Ruidan, CHEN Yue

2024, 45(7):  20240148.  doi:10.7503/cjcu20240148

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The development of anode materials with fast charge and discharge rates and favorable metal ion storage is of great significance for rechargeable metal ion batteries. In this paper， the first-principle method based on density functional theory（DFT） was used to explore the application prospects of monolayer GeTe with a unique zigzag wrinkled layer structure as an anode material for lithium/sodium/potassium ion batteries. The calculation results show that monolayer GeTe is beneficial for the stable adsorption of lithium/sodium/potassium ions（-0.636， -0.794 and -1.26 eV）， and the strong relationships between metal ion and monolayer GeTe are proved through the electron density difference and partial density of states. Low diffusion barriers of lithium/sodium/potassium ions on monolayer GeTe（1.103， 0.344 and 0.483 eV） and diffusion coefficients calculated by molecular dynamics simulations（3.65×10^-12， 2.385×10^-10 and 9.43×10^-12 cm²/s） indicate its excellent diffusion ability and fast charge and discharge rate during the charge and discharge process. Reasonable open circuit voltage（0.39， 0.64 and 0.25 V） and higher theoretical specific capacities（535.4， 669.2 and 1070.72 mA·h/g） than that of commercial graphite anode materials indicate that monolayer GeTe can be used as a promising anode material for lithium/sodium/potassium ion batteries， and provide inspiration for the rational design of other similar wrinkled layer hexagonal structures in energy conversion and storage devices in the future.



Preparation and Zinc Storage Properties of Three-dimensional Nitrogen-doped Hierarchical Porous Carbon Nanosheets

HE Jun, ZHU Aoyang, WEI Yuchen, ZHU Yiquan, JIANG Li, HE Xiaojun

2024, 45(7):  20240099.  doi:10.7503/cjcu20240099

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In this work， three-dimensional nitrogen-doped hierarchical porous carbon nanosheets（N-CNs） were synthesized from coal tar pitch（CTP） by using MgO@ZIF-8 as double template and auxiliary carbon source coupled with KHCO₃in situ activation. The effects of the mass ratio of KHCO₃ to CTP on the structure， chemical composition and zinc ion storage properties of N-CNs were investigated. The as-prepared N-CN₃ at a mass ratio of 3∶1 of KHCO₃ to CTP features a three-dimensional interconnected carbon nanosheet structure， high specific surface area（2360 m²/g） and pyrrole nitrogen content. Benefiting from the above characteristics， the N-CN₃ cathode of zinc-ion hybrid capacitor（ZHCs） in 2 mol/L ZnSO₄ exhibits excellent specific capacity（157.6 mA·h/g at 0.2 A/g）， high energy density（126.5 W·h/kg at 176.1 W/kg） and exceptional cycle stability （only 6.4% capacity decay after 20000 cycles at 5 A/g and 100% Coulomb efficiency）. The density functional theory（DFT） calculation results verified the enhancement of the adsorption energy to Zn²⁺ due to the presence of pyrrole nitrogen in N-CNs， thus leading to enhanced adsorption capacity of N-CNs to zinc ions. This work prides an efficient method for the high-added value utilization of coal chemical by-products.



Mechanism of Hydrolysis of Microcystins Enhanced by Lewis Acid Sites on the Surface of Pyrite-Fe（Ⅲ）

LAN Xing, HE Yuting, ZHANG Qing, FANG Yanfen, DENG Anping, ZHAO Haixia, ZHANG Zhaonian

2024, 45(7):  20240086.  doi:10.7503/cjcu20240086

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Natural mineral（Pyrite） can effectively degrade microcystins（Microcystins， MCs） in water at warm temperature（60 ℃）（k=0.072 min^‒1） ， but how to break through the heat bottleneck and attain efficient degradation of MCs at room temperature ［（25±5） ℃］ are still a technical issue in water treatment nowadays. In this study， the addition of iron ions（Fe³⁺， FeCl₃） can accelerate the hydrolysis efficiency of microcystins-RR（Microcystin-RR， MC-RR） in pyrite system at room temperature（hydrolysis contribution rate 77.94%）， and the degradation rate constant（0.36 h^‒l） was three times higher than that of pyrite alone（0.12 h^‒l）. X-ray photoelectron spectroscopy（XPS）， cyclic voltammetry（CV）， in situ attenuated total reflection-Fourier transform infrared spectroscopy（in situ ATR-FTIR） and density functional theory（DFT） suggested that the addition of Fe³⁺ enhanced the amount of iron sites of Lewis acid on pyrite surface by forming Fe（Ⅲ）—O bond， and then hydrolyzed MC-RR amide bond through its coordination with C=O. Additionally， the addition of Fe³⁺ can oxidize the multivalent sulfur species on the surface of pyrite（S _n^{2 ‒}， S₂^{2 ‒}） to elemental sulfur（S₀）， further promoting the hydrolysis of MC-RR by forming hydrogen bond （—NH…S）. This study not only provides a normal temperature mineral treatment technology for cyanobacteria bloom treatment， but also provides a theoretical basis for the self-purification mechanism of amide organic pollutants in natural water.



Preparation of Defect Sites Rich CuAg Catalyst for CO₂ Reduction to C₂₊ Products

JING Huifang, LIU Yi, FANG Qiang, LANG Xuelei, HAO Genyan, ZHONG Dazhong, LI Jinping, ZHAO Qiang

2024, 45(7):  20240082.  doi:10.7503/cjcu20240082

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In this paper， defect sites rich Ag/Cu-OH was obtained by electrochemical reduction of Ag/Cu（OH）₂ for efficient carbon dioxide reduction reaction（CO₂RR） to C₂₊ products. The defect sites rich Ag/Cu-OH gives a superior activity than Ag/Cu-O obtained from the reduction of Ag/CuO precursor. The electrocatalytic performance of the catalyst was evaluated in the H-cell， and Ag_2%/Cu-OH showed 1.5 times higher ethylene（C₂H₄） Faradaic efficiency（FE） and 1.3 times higher C₂₊ Faraday efficiency than Ag_2%/Cu-O. We obtained a high C₂H₄ FE of 56.2% on Ag_2%/Cu-OH in the membrane electrode assembly（MEA） electrolyze at the high current density of 375 mA/cm². The improved performance of Ag_2%/Cu-OH can be attributed not only to the synergistic effect between Cu and Ag， but also to the presence of more low coordination Cu defect sites， which facilitate the adsorption of CO and further promote the dimerization of ^*CO to C₂₊ products.



Polymer Chemistry

Ring-opening Alternating Copolymerization of Epoxides with Dihydrocoumarin Catalyzed by Phosphazenium/Et₃B Binary Catalytic System

JIANG Chunhuan, WANG Junqi, LIU Xiaoyu, YANG Ye, REN Chuanli, LI Zhibo

2024, 45(7):  20240159.  doi:10.7503/cjcu20240159

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The ring-opening alternating copolymerization（ROAC） of 3，4-dihydrocoumarin（DHC） with various epoxides was successfully achieved using a binary catalytic system consisting of tri［tris（dimethylamino）phosphoranylidenamino］ phosphonium chloride（P₄⁺Cl^‒） and triethylborane（TEB）. The impact of polymerization temperature and catalyst loading on the catalytic activity and selectivity of ROAC was investigated. The P₄⁺Cl^‒/TEB catalytic system was found to be highly efficient and controlled in the ROAC process， preventing the intramolecular transesterification. This results in polyesters with high alternating structures， controlled molecular weights， and preserved functional groups fidelity. The effectiveness of the catalyst system is supported by kinetic investigations， proton nuclear magnetic resonance（¹H NMR） and size exclusion chromatography（SEC） spectra， as well as matrix-assisted laser desorption/ionization-time of flight-mass spectrometry（MALDI-TOF-MS） analysis.



Piezoelectric Effect of Polyether Ether Ketone Fibers Loaded with Bismuth Oxide Stimulating Osteogenic Differentiation

LIANG Luxian, SONG Anqi, ZHOU Yang, SUN Ping, WANG Deqiang, WEI Jie

2024, 45(7):  20240169.  doi:10.7503/cjcu20240169

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Oxygen-vacancy bismuth oxide（BiO_2‒x ） with excellent piezoelectric property was prepared by ultrasonic peel method and loaded on polyether ether ketone（PEEK） fiber by using chlorogenic acid. A kind of rotator cuff patch material with piezoelectric effect was designed， and its effects on macrophage polarization and osteoblast behavior were studied. The results showed that after loading BiO_2‒x， not only the surface properties（roughness， hydrophilicity， and surface energy， etc.） of PEEK fibers were obviously improved， but also the piezoelectric properties were significantly enhanced（piezoelectric coefficient of 3.8 pC/N， output voltage of 0.97 V and output current of 575.6 μA）. The patch material not only promoted the anti-inflammatory M2 macrophage polarization， but also promoted the adhesion， proliferation， and osteogenic differentiation of osteoblasts. The patch material has potential application for repairing rotator cuff tear.