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Chinese journal of Structural Chemistry 2021年第5期40卷 637-645,530页

作者： CAI Hua lI na lI Yan AN Dong-Min College of Science Civil Aviation University of ChinaTianjin 300300China

In this work two isomeric semi-rigid multi-carboxylate ligands 3,5-bi(3-carboxyphenoxy)benzoic acid(3-H_3BCP), 3,5-bi(4-carboxyphenoxy)benzoic acid(4-H_(3)BCP) and two rigid ligands(bis-triazole 4-(4-(4H-1,2,4-triazol-4-yl)phenyl)-4 H-1,2,4-triazole(l^(1)), 2-(1H-pyrazol-3-yl)pyrazine(l^(2))) have been employed to react with Cd(Ⅱ) salts under similar solvothermal reactions. Two novel Cd(Ⅱ) mixed-ligand coordination polymers, namely, {[Cd_3(3-BCP)_(2)(l^(1))]·3H_(2)O}n(1) and [Cd(4-HBCP)(l^(2))]_n(2), have been isolated. 1 displays a rare 2D cluster-based network while 2 displays a 3D supramolecular network through weak interactions. Solid-state luminescent properties and thermal analyses of 1 and 2 also have been determined, indicating strong fluorescent emissions and good thermal stabilities. Different coordination modes of two semi-rigid multi-carboxylate ligands and l^(1) and l^(2) also have been briefly discussed, which also reveal the great potential in the construction of these novel mixed-ligand luminescent frameworks with diverse structural motifs and unique functional properties.

关键词： isomeric semirigid multicarboxylate photoluminescent properties

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A cationic metal-organic framework based on {Zn4} cluster for rapid and selective adsorption of dyes

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Chinese Chemical letters 2018年第6期29卷 857-860页

作者： Weiwei He na li Xi Wang Tongliang Hu Xianhe Bu Department of Chemistry Nankai University School of Materials Science and Engineering National Institute for Advanced Materials Nankai University Tianjin Key laboratory of Metal and Molecule-Based Material Chemistry Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education)and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Nankai University

Until now, to remove the harmful organic dyes from effluents is an outstanding challenge. The design and synthesis of new porous materials capable of selectively adsorbing dyes are critical to the environment and human health. Here, a unique cluster-based cationic metal-organic framework, named{[Zn8（BTA）6（l）5Cl2]·（NO3）3}·5 DMF（NUM-4） was synthesized, which displays one-dimensional（1 D）open channels along a axis in its 3 D supramolecular stacking structure. Benefiting from the nature of cationic framework and high surface area/pore volume, NUM-4 shows rapid and selective adsorption of anionic dyes（MO, AO, CR and MB） based on the charge-exclusive effect. Besides, the adsorbed dyes can be easily released in NH4Cl saturated solution of ethanol.

关键词： Metal-organic framework Supermolecule Anionic dyes Adsorption and separation Charge-exclusive effect

Involvement of chloride anion in photocatalytic process

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journal of Environmental Sciences 2005年第5期17卷 761-765页

作者： YANG Shi-ying CHEN Ying-xu lOU li-ping WU Xiao-na Department of Environmental Engineering Zhejiang University Hangzhou 310029 China College of Environmental Sciences anti Engineering Ocean University of China Qingdao 266003 China

The effect of Cl^- on photocatalytic degradation（PCD） of pollutants is an important factor since it is ubiquitous in nature. In general, Cl^- showed an inhibition on photodegradation due to its scavenging HO- radicals. In this paper, experiments were carried out to examine the effects of CI on the PCD of Methylene Blue （MB） and Orange II （OII） in aqueous TiO2 suspensions under UV light illumination. It was found that low concentration of Cl^- （〈 0.01 mol/l） showed little influence on both dyes, however, high concentration of Cl^- （〉 0.10 mol/l） had a very different influence on the decolorization of dyes： a significant inhibition for MB but a great promotion for Oll. In the presence of 0.50 mol/l Cl^- , the rate decreased by 70% for MB while increased 7.5-fold for Oll. Furthermore, two bands in the ultraviolet region of Oll were rapidly broken down. The proposed mechanism was discussed in detail.

关键词： photocatalytic degradation TiO2 dye pollutants chloride ion mechanism

The role of organic electron donors in the initiation of BhaS base-induced coupling reactions between haloarenes and arenes

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Science China Chemistry 2019年第11期62卷 1425-1438页

作者： Andrew j.Smith Darren l.Poole john A.Murphy Department of Pure and Applied Chemistry University of StrathclydeStrathclydeGlasgow G11XLUnited Kingdom Flexible Discovery Unit GlaxoSmithKline Medicines Research CentreStevenageSG12NYUnited Kingdom

Coupling reactions between haloarenes and arenes(including heteroarenes)that are conducted without added transition metals but in the presence of KOtBu or naOtBu,have been a topic of great interest since their discovery in *** organic structures act as additives that assist these *** additives are converted into organic electron donors by the butoxide base and this leads to initiation of the coupling reactions,which proceed by radical chain *** review provides an overview of the initiation stages of these reactions.

关键词： organic electron donor potassium tert-butoxide electron transfer base-promoted homolytic aromatic substitution(BhaS) coupling benzyne

Glycidyl methacrylate-compatibilized poly(lactic acid)/hemp hurd biocomposites： Processing, crystallization, and thermo-mechanical response

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journal of Materials Science & Technology 2018年第2期34卷 387-397页

作者： Belas Ahmed Khan haining na Venkata Chevali Philip Warner jin Zhu hao Wang Centre for Future Materials University of Southern Queensland Toowoomba QLD 4350 Australia Ningbo Institute of Industrial Technology Chinese Academy of Sciences Ningbo 315201 China Ecofibre Industries Operations Pty ltd Maleny OLD 4552 Australia

Poly（lactic acid）-based biocomposites were developed with hemp hurd （Cannabis sativa l.） with grafting-based interfacial compatibilization. Poly（lactic acid） was extruded with hemp hurd and glycidyl methacrylate as the polymer/hurd interfacial compatibilizer, and injection molded. Interfacial compatibility between poly（lactic acid） and hemp hurd increased with grafted glycidyl methacrylate in comparison to the non-compatibilized control, as corroborated by scanning electron microscopy fractog- raphy and mechanical analysis, which showed increases in the glycidyl methacrylate-grafted 20% （w/w） hemp hurd/poly（lactic acid） biocomposite, retaining 94% of the neat polymer strength, with increases in crystallinity, and showing a range of thermo-mechanical properties desirable for rigid biocomposite aoolications.

关键词： Hemp hurd Poly(lactic acid) Glycidyl methacrylate Biocomposite Injection molding Mechanical properties

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可实现实际节油的前端附件带传动系统

汽车与新动力 2019年第4期2卷 52-57页

作者： [韩]j.lee [韩]S.OH [韩]K.S.jOO [韩]S.YI [韩]K-P.ha [韩]S.jOO 孙丹红(译) 田永海(译) 不详

由于泵气损失、机械摩擦损失和前端附件功率消耗等原因,发动机的指示扭矩无法完全传递给车轮。前端附件带传动系统(FEAD)对空调压缩机、交流发电机和动力转向泵等各种附件进行供油和控制,属于功率消耗装置。在实际驾驶条件下,标准燃油... 详细信息

由于泵气损失、机械摩擦损失和前端附件功率消耗等原因,发动机的指示扭矩无法完全传递给车轮。前端附件带传动系统(FEAD)对空调压缩机、交流发电机和动力转向泵等各种附件进行供油和控制,属于功率消耗装置。在实际驾驶条件下,标准燃油经济性试验并未考虑附件驱动力矩,仅将其作为5循环修正系数。因此,研究改善前端附件传动系统仍具有重要意义,对于空调压缩机和交流电机尤为如此。该研究有两个目的:一是定量测量FEAD系统的驱动力矩数值以评价附件产生的损失;二是利用评价标准设计一种能够有效减小FEAD系统摩擦的措施。为了确定所提方案是否值得开发,对FEAD系统的基本特性进行了研究。为使2.0l柴油机FEAD系统的驱动力矩最小化,设计了多种方法。在实际驾驶条件下,测量广泛采用了附件负荷控制器和温控箱。对FEAD系统进行改造,如优化多楔带、惰轮、张紧轮和附件等,驱动力矩得以显著减小。因此,这是一种在联邦测试循环(FTP)、欧洲新驾驶循环(NEDC)和实际驾驶排放(RDE)试验等标准试验模式下改善车辆燃油经济性的重要措施。

关键词：前端附件带传动燃油耗交流电机空调压缩机

Temporal assembly patterns of microbial communities in three parallel bioreactors treating low-concentration coking wastewater with differing carbon source concentrations

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journal of Environmental Sciences 2024年第3期137卷 455-468页

作者： Weijia li Yu Xia na li jie Chang jing liu Pei Wang Xuwen He School of Chemical and Environmental Engineering China University of Mining and Technology-BeijingBeijing 100083China

Carbon source is an important factor of biological treatment systems, the effects of which on their temporal community assembly patterns are not sufficiently understood *** this study, the temporal dynamics and driving mechanisms of the communities in three parallel bioreactors for low-concentration coking wastewater(CWW) treatment with differing carbon source concentrations(S0 with no glucose addition, S1 with 200 mg/l glucose addition and S2 with 400 mg/l glucose addition) were comprehensively studied. Highthroughput sequencing and bioinformatics analyses including network analysis and Infer Community Assembly Mechanisms by Phylogenetic bin-based null model(iCAMP) were used. The communities of three systems showed turnover rates of 0.0029~0.0034 every 15days. Network analysis results showed that the S0 network showed higher positive correlation proportion(71.43%) and clustering coefficient(0.33), suggesting that carbon source shortage in S0 promoted interactions and cooperation of microbes. The neutral community model analysis showed that the immigration rate increased from 0.5247 in S0 to 0.6478in S2. The iCAMP analysis results showed that drift(45.89%) and homogeneous selection(31.68%) dominated in driving the assembly of all the investigated microbial *** contribution of homogeneous selection increased with the increase of carbon source concentrations, from 27.92% in S0 to 36.08% in S2. The OTUs participating in aerobic respiration and tricarboxylic acid(TCA) cycle were abundant among the bins mainly affected by deterministic processes, while those related to the metabolism of refractory organic pollutants in CWW such as alkanes, benzenes and phenols were abundant in the bins dominated by stochastic processes.

关键词： Coking wastewater treatment Temporal dynamics Network analysis Deterministic processes Stochastic processes

A signal-amplified whole-cell biosensor for sensitive detection of Hg^2+ based on Hg^2+-enhanced reporter module

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journal of Environmental Sciences 2020年第10期32卷 93-98页

作者： Dan Wang Yanan Zheng liudan Wei na Wei Xiaosu Fan Shan Huang Qi Xiao College of Chemistry and Materials Guangxi Key Laboratory of Natural Polymer Chemistry and PhysicsNanring Normal UniversityNanning 530001China Experimental Center of College of Agriculture Guangxi UniversityNanning 530005China

A signal-amplified mercury sensing biosensor with desired sensitivity was developed through firstly using the GFP mutant with fluorescence increasing response towards Hg^2+ as the reporter *** developed biosensor showed response for Hg^2+ in a relatively wide range of 1–10,000 nmol/l,and the detection limit was improved one or two orders of magnitude in comparison with most metal-sensing biosensors in similar *** addition,the biosensor could distinguish Hg^2+ easily from multiple metal ions and displayed strong adaptability to extensive p H conditions (pH 4.0–10.0).More importantly,the developed biosensor was able to provide an initial assessment of Hg^2+ spiked in the environmental water with the recoveries between 85.70%and 112.50%.The signal-amplified strategy performed by the modified reporter module will be widely applicable to many other wholecell biosensors,meeting the practical requirements with sufficient sensing performance.

关键词： Mercury sensing biosensor Signal-amplified Reporter module Environmental samples monitoring

New wheel-shaped ln_(6) clusters for conversion of CO_(2) and magnetic properties

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journal of Rare Earths 2023年第10期41卷 1574-1582,I0004页

作者： Wenmin Wang na Qiao Xiaoyan Xin Chen Yang Ying Chen Shanshan Dong Chenxi Zhang College of Chemistry and Materials Taiyuan Normal UniversityJinzhong030619China College of Chemical Engineering and Materials Science Tianjin University of Science and TechnologyTianjin300457China

A series of novel hexanuclear lanthanide dusters,namely,[ln_(6)(Hl)_(6)(NO_(3))_(6)]·3CH_(3)CN(ln=Gd(1),Tb(2),Dy(3)and Er(4))was assembled using a multidentate ligand H3l(trolamine).The clusters 1-4 show a wheel-shaped ln_(6)topology with the approximate diameter and thickness of 1.5 and 0.7 nm,*** of them show high thermal *** the aspect of the catalytic capacities for the cycloaddition reactions of CO_(2)and epoxide,the reaction conditions,the substrate scope,and possible catalytic mechanism were *** highest yield for clusters 1-4 is up to 99%at 333 K for 12 *** particular,cluster 1 can be reused at least three times with no obvious loss of catalytic performance and keep the integrity of the crystal *** investigations reveal that cluster 1 exhibits a relatively large magnetocaloric effect with-ΔS_(m)=41.43 j/(kg·K)(T=3.0 K,7.0 T);while cluster 3 displays slow magnetic relaxation behavior under zero dc field with U_(eff)=0.51 K andτ_(0)=2.54×10^(-5)s.

关键词： Wheel-shaped ln_(6)clusters Conversion of CO_(2) Magnetocaloric effect Single-molecular magnet behavior Rare earths

Interfacial coupling of sea urchin-like(Mo4O11-MoS2-VO_(2)) promoted electron redistributions for significantly boosted hydrogen evolution reaction

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Chinese Chemical letters 2023年第4期34卷 368-373页

作者： Yupeng Xing na li Shipeng Qiu Gang Zhao Shuhua hao Baojie Zhang laboratory of Functional Micro-nano Materials and Devices School of Physics and TechnologyUniversity of JinanJi’nan 250022China

Developing efficient electrocatalysts for hydrogen evolution reaction(HER) is of great importance in contemporary water electrolysis technology. Here, a novel hierarchically sea urchin-like electrocatalyst(Mo_(4)O_(11)-MoS_(2)-VO_(2)) is synthesized by hydrothermal deposition and post-annealing strategy. The optimized electrocatalyst behaves as a high active hydrogen evolution electrode in 0.5 mol/l H_(2)SO_(4). This electrode needs overpotential of only 43 m V to achieve 10 m A/cm^(2)with a Tafel slope of 37 m V/dec and maintains its catalytic activity for at least 36 h. Better than most previously reported non-noble metal electrocatalysts anchored on carbon cloth. It is worth mentioning that the hierarchical sea urchin-like structure promotes the redistribution of electrons and provides more catalytic active sites. This strategy shows a way for the construction of inexpensive non-noble metal electrocatalysts in the future.

关键词： Non-noble metal Hierarchical sea urchin-like (Mo4O11-MoS2-VO_(2)) Interfacial coupling Electron redistribution HER