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Chinese Chemical Letters 2022年第5期33卷 2425-2428页

作者： Chuangui Yu Qinze Zheng Linhua Wang Tianbao Wang Xuesong Zheng Ge Gao key laboratory of Green Chemistry and Technology of ministry of education College of ChemistrySichuan UniversityChengdu 610064China

We report the convenient synthesis of a benzobis(imidazolium)-embedded conjugated polyelectrolyte pBBI by a Cu-catalyzed direct C–H arylation of a cationic benzobis(imidazolium)monomer with a di-iodide *** shows weak fluorescence in solution due to rotation of the repeat units in the conjugated backbone,and enhanced fluorescence when electrostatically interacting with a variety of an-ions to form ***,pBBI responds to the bisulfite anion with intensified unique deep-blue fluorescence easily discriminated by naked eye.

关键词： Conjugated polyelectrolyte(CPE) Benzobis(imidazolium) C–H arylation Fluorescent anion sensing Bisulfite

A universal strategy for achieving dual cross-linked networks to obtain ultralong polymeric room temperature phosphorescence

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Science china Chemistry 2023年第4期66卷 1161-1168页

作者： Yifan Niu Yan Guan Chunye Long Chaofan Ren Jiwen Lu Chanjuan Jin Ping Wang Xinghe Fan He-Lou Xie key laboratory of Environment-friendly Chemistry and Application of ministry of education Key Laboratory of Polymeric Materials and Application Technology of Hunan Province and Key Laboratory of Advanced Functional Polymer Materials of Colleges and Universities of Hunan ProvinceCollege of ChemistryXiangtan UniversityXiangtan 411105China Beijing National laboratory for Molecular Sciences Key Laboratory of Polymer Chemistry and Physics of Ministry of EducationCenter for Soft Matter Science and EngineeringCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China

Efficient polymeric room-temperature phosphorescence(PRTP)with excellent processability and flexibility is highly desirable but still faces formidable ***,a general strategy is developed for efficient PRTP through photo-polymerization of phosphor monomers and N-isopropylacrylamide(NIPAM)spontaneously without a *** ultralong lifetime of 3.54 s with afterglow duration time of 25 s and decent phosphorescent quantum efficiency of 13%are *** efficient PRTP has been demonstrated to be derived from the synergistic effect of the covalent and hydrogen bonds networks formed through photo-polymerization of *** electron paramagnetic resonance(EPR)spectra confirmed that methyl radicals are generated under the irradiation of ultraviolet light and promote the formation of covalent cross-linking *** strategy has also been proved to be generalizable to several other phosphor ***,the polymer films display ultrahigh temperature resistance with long afterglows even at 140℃ and unexampled ultralong lifetime of 2.45 s in aqueous *** work provides a simple and feasible avenue to obtain efficient PRTP.

关键词： universal strategy ultralong polymeric room temperature phosphorescence dual cross-linked networks photopolymerization crosslinker

Effects of fulvic acid and humic acid from different sources on Hg methylation in soil and accumulation in rice

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Journal of Environmental Sciences 2022年第9期34卷 93-105页

作者： Shu Ran Tianrong He Xian Zhou Deliang Yin key laboratory of Karst Georesources and Environment(Guizhou University) Ministry of EducationGuiyang 550025China College of Resources and Environmental Engineering Guizhou UniversityGuiyang 550025China Guizhou Karst Environmental Ecosystems Observation and Research Station Ministry of EducationGuiyang 550025China

Humus is often used as an organic modifier to reduce the bioaccumulation of heavy metals in plants, but the effects of different humus components from different sources on the fate of mercury(Hg) in paddy fields are still unclear. Here, fulvic acid(FA) and humic acid(HA) extracted from composted straw(CS), composted cow dung(CCD), peat soil(PM) and lignite coal(LC) were used to understand their effects on the methylation and bioaccumulation of Hg in paddy soil by pot experiments. Amendments of both FA and HA largely increased the abundance of Hg-methylating microbes and low-molecular-weight organic matters(e.g, cysteine) in paddy soil. They were also found to change the aromaticity, molecular size and Chromophoric DOM concentration of DOM, and resulted in heterogeneous effects on migration and transformation of Hg. All the FA-amended treatments increased the mobility and methylation of Hg in soil and its absorption in roots. Nevertheless, FA from different sources have heterogeneous effects on transport of Hg between rice tissues. FA-CCD and FA-PM promoted the translocation of Me Hg from roots to rice grains by 32.95% and 41.12%, while FA-CS and FA-LC significantly inhibited the translocation of inorganic Hg(IHg) by 52.65% and 66.06% and of Me Hg by 46.65% and 36.23%, respectively. In contrast, all HA-amended treatments reduced the mobility of soil Hg, but promoted Hg methylation in soil. Among which, HA-CCD and HA-PM promoted the translocation of Me Hg in rice tissues by 88.95% and 64.10%, while its accumulation in rice grains by 28.43% and 28.69%, respectively. In general, the application of some FA and HA as organic modifiers to reduce Hg bioaccumulation in rice is not feasible.

关键词： Humic acid Fulvic acid Methylmercury Accumulation Rice

Influence of Freezing Layer on the Crystallization Kinetics of PCL on Oriented PE Film

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Chinese Journal of Polymer Science 2023年第5期41卷 778-786,I0010页

作者： Hao Zhang Ying-Xiao Song Na Li Shao-Juan Wang Jian Hu Rui Xin Jie Zhang Chun-Feng Song Shou-Ke Yan key laboratory of Rubber-Plastics Ministry of Education/Shandong Provincial Key Laboratory of Rubber-PlasticsQingdao University of Science&TechnologyQingdao 266042China State key laboratory of Chemical Resource Engineering Beijing University of Chemical TechnologyBeijing 100029China

The effect of freezing layer on the crystallization kinetics of poly(ε-caprolactone)(PCL)thin and ultrathin films was investigated by monitor the growth process of it on oriented polyethylene(PE)and CaF_(2)with and without freezing layer,*** was found that the PCL films with similar thicknesses crystallize much faster on oriented PE than on CaF_(2)*** example,the crystallization rate constant of a 102 nm thick PCL film decreases tremendously by 3 orders of magnitude from 1.1×10^(-1) on PE substrate at 50℃to 7×10^(-4)on CaF_(2)surface at 40℃.Moreover,the crystallization of PCL accelerates on CaF_(2)surface while slows down at PE surface with increasing film *** ultrathin films of PCL with thickness less than 14 nm exhibits the fastest crystallization rate on oriented PE with a rate constant of about 3.5×10^(-1),which is 3 times higher than that of a ca.50 nm thick *** illustrates the great influence of freezing layer on the crystallization process of *** freezing layer thickness of PCL on PE is estimated to be in the range of 14-17 *** the radius of gyration(R_(g)~15.6 nm)of the used PCL material into account,the obtained results may imply the existence of a correlation between the R_(g)of PCL and its freezing layer thickness at PE substrate.

关键词： Poly(ε-caprolactone) Polyethylene Interface Freezing layer Crystallization kinetics

Rigid chelating dicarbene ligands based on naphthyridine-fused bisimidazolium salts

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Chinese Chemical Letters 2022年第6期33卷 2993-2996页

作者： Yan Liu Zhijie She Qinze Zheng Xuesong Zheng Tianbao Wang Ge Gao key laboratory of Green Chemistry and Technology of ministry of education College of ChemistrySichuan UniversityChengdu610064China

Naphthyridine-fused bisimidazolium salts were designed and synthesized for the first time. The study of the Cu(Ⅱ) and Pd(Ⅱ) complexes demonstrated that the deprotonated dicarbene ligands are rigid chelating C,C-liga... 详细信息

关键词： NHC Dicarbene ligand Naphthyridine Phenanthroline

Probing microstructural evolution in weld metals subjected to varied CaF_(2)-TiO_(2) flux cored wires under high heat input electro-gas welding

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Journal of Iron and Steel Research(International) 2023年第1期30卷 150-157页

作者： Xu Xie Ming Zhong Tan Zhao Cong Wang key laboratory for Ecological Metallurgy of Multimetallic Mineral(ministry of education) Northeastern UniversityShenyang 110819LiaoningChina School of Metallurgy Northeastern UniversityShenyang 110819LiaoningChina State key laboratory of Advanced Special Steel Shanghai UniversityShanghai 200444China State key laboratory of Metal Material for marine Equipment and Application Ansteel Co.Ltd.Anshan 114021LiaoningChina

Fused CaF_(2)-TiO_(2) fluxes have been designed,prepared,and applied in the flux cored wires to join EH36 shipbuilding steels under high heat input electro-gas *** microstructural evolution in the weld metals subjected to varied CaF_(2)-TiO_(2) flux cored wires has been fully *** has been demonstrated that as the content of TiO2 in the fused fluxes increases,columnar grain size increases,and major constituents in the weld metal change from lath bainite,to granular bainite,and then to acicular *** phenomena are elucidated via salient chemical reactions involving oxygen pickup and concurrent titanium transfer.

关键词： Microstructural evolution Elemental variation Electro-gas welding High heat input Shipbuilding steel

Reliable attitude estimation algorithm considering atypical observation

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Science china(Information Sciences) 2022年第10期65卷 301-302页

作者： Xiao-Ting GUO Chong SHEN Jun TANG Jie LI Jun LIU key laboratory of Instrumentation Science and Dynamic Measurement Ministry of Education School of Instrument and Electronics North University of China

Dear editor,Attitude estimation has theoretical significance and engineering application value in tracking, control, navigation and positioning [1] in the military and civil domain. Common single attitude measurement techniques based on inertial techniques [2] or monocular vision are defective in trying to meet multiple measurement requirements as their own inherent features.

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Numerical Simulation of Thermo-Hydro-Mechanical-Chemical Response Caused by CO_(2)Injection into Saline Geological Formations:A Case Study from the Ordos Project,china

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Acta Geologica Sinica(English Edition) 2023年第3期97卷 889-910页

作者： FAN Zejin XU Tianfu YANG Bo ZHANG Hui ZHU Huixing key laboratory of Groundwater Resources and the Environment Ministry of EducationJilin UniversityChangchun 130021China Jilin Provincial key laboratory of Water Resources and the Environment Jilin UniversityChangchun 130021China

Thermo-hydro-mechanical-chemical(THMC)interactions are prevalent during CO_(2)geological sequestration(CGS).In this study,a sequential coupling THMC numerical simulation program was constructed,which can be used to explore the following issues of CGS:fluid and heat flow,solute transport;stresses,displacements and rock failures related to geo-mechanical effects;equilibrium and kinetic chemical reactions;chemical damage to mechanical properties of the ***,the coupling program was applied to the Ordos CGS Project to study the formation response under the multifield interaction caused by CO_(2)*** simulation results show that the mechanical process dominates the short CO_(2)injection ***,the formation’s permeability near the injection well increases by 43%,due to the reduction of effective stress,which significantly promotes the lateral migration of CO_(2).When the injection rate exceeds 0.15 million tons per year,the cohesion of the reservoir rock is not enough to resist the shear force inside the rock and rock failure may *** the subsequent long-term sequestration period(200 years),the influence of mineral reactions gradually *** to calcite dissolution,the shear modulus of caprock is predicted to decrease by 7.6%,which will to some extent increase the risk of rock failure.

关键词： CO_(2) geological sequestration THMC coupling numerical simulation chemical damage

Photo-thermal synergistic excitation:Feasible strategy to detect ethanol for wide bandgap ZIF-8at low work temperature

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Journal of Environmental Sciences 2024年第4期138卷 112-120页

作者： Shuhao Shi Qian Du Ming Hou Xiaolei Ye Li Yang Shenghui Guo Jianhong Yi Ullah Ehsan Hongbo Zeng State key laboratory of Complex Nonferrous Metal Resources Clean Utilization Faculty of Metallurgical and Energy EngineeringKunming University of Science and TechnologyKunming 650093China Department of Chemical and Materials Engineering University of AlbertaEdmonton T6G 2V4Canada FEMTO-ST Institute(UMR CNRS 6174) Universite de Bourgogne Franche-Comte(UBFC)Universite de technologie de Belfort Montbéliard(UTBM)Site de MontbeliardBelfort F-90010France Faculty of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093China

Zeolitic Imidazolate Framework-8(ZIF-8)material was prepared by chemical precipitation *** microstructure and physical properties of the as-prepared samples were characterized by XRD,BET,FESEM and UV *** self-made four-channel measurement device was used to test the gas sensitivity of ZIF-8 material toward ethanol gas under photo-thermal synergistic *** results showed that the sample was typical ZIF-8(E_(g)=4.96 eV)with a regular dodecahedron shape and the specific surface is up to 1793 m^(2)/*** as-prepared ZIF-8 has a gas response value of 55.04 to 100 ppm ethanol at 75℃ and it shows good gas sensing selectivity and repeated *** excellent gas sensitivity can be attributed to the increase of free electron concentration in the ZIF-8 conduction band by photo-thermal synergistic excitation,and the large specific surface area of ZIF-8 material provides more active sites for gas-solid surface *** reaction mechanism of ZIF-8 material under multi-field excitation was also discussed.

关键词： ZIF-8 material Photo-thermal synergistic excitation UV-light irradiation Photon-generated electron and hole Gas-sensitive property

Antiviral effects of natural small molecules on aquatic rhabdovirus by interfering with early viral replication

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Zoological Research 2022年第6期43卷 966-976页

作者： Yan Zhou Tian-Xiu Qiu Yang Hu Lei Liu Jiong Chen State key laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products Ningbo UniversityNingboZhejiang 315211China laboratory of Biochemistry and Molecular Biology School of Marine SciencesMeishan CampusNingbo UniversityNingboZhejiang 315832China key laboratory of Applied marine Biotechnology of ministry of education Meishan CampusNingbo UniversityNingboZhejiang 315832China

Spring viremia of carp virus(SVCV)is globally widespread and poses a serious threat to aquatic ecology and aquaculture due to its broad host *** develop effective agents to control SVCV infection,we selected 16 naturally active small molecules to assess their anti-SVCV ***,dihydroartemisinin(DHA)(100μmol/L)and(S,S)-(+)-tetrandrine(TET)(16μmol/L)exhibited high antiviral effects in epithelioma papulosum cyprinid(EPC)cells,with inhibitory rates of 70.11%and 73.54%,*** possible antiviral mechanisms were determined as follows:*** with DHA and TET decreased viral particle infectivity in fish cells,suggesting that horizontal transmission of SVCV in the aquatic environment was disrupted;*** neither had an effect on viral adhesion,TET(but not DHA)interfered with SVCV entry into host cells(>80%),suggesting that TET may have an antiviral function in early viral *** in vivo study,both agents enhanced the survival rate of SVCV-infected zebrafish by 53.3%,significantly decreased viral load,and modulated the expression of antiviralrelated genes,indicating that DHA and TET may stimulate the host innate immune response to prevent viral ***,our findings indicated that DHA and TET had positive effects on suppressing SVCV infection by affecting early-stage viral replication,thus holding great potential as immunostimulants to reduce the risk of aquatic rhabdovirus disease outbreaks.

关键词： Spring viremia of carp virus Natural small molecules Antiviral effects Virus internalization Danio rerio