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Structural and Magnetic Characterization of Two New Coordination Compounds Based on a Fluorene Derivative Ligand

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Chinese Journal of Structural Chemistry 2022年第2期41卷 64-72,I0009页

作者： YANG Qing-Feng YUE Kai WANG Zhi-Hui lai xiao-yong WANG xiao-Zhong QIN Ling State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering National Demonstration Center for Experimental Chemistry EducationCollege of Chemistry and Chemical EngineeringNingxia UniversityYinchuan 750021China Chongqing Changfeng Chemical Industrial Co. Ltd.Chongqing 401220China

Two new coordination compounds[Co(FDC)_(2)(H_(2)O)_(2)]_(n)(1)and[Cu(FDC)_(2)(2,2?-bpy)]·DMF·H_(2)O(2)(HFDC=9-fluorenone-4-carboxylic acid,bpy=2,2?-bipyridine,DMF=N,N-dimethylformamide)were prepared by the reactions of corresponding metal salts with a fluorene derivative ligand of *** compounds were thoroughly analyzed by X-ray single-crystal diffraction,elemental analysis,IR spectra,PXRDand thermal *** 1 features a 1D *** two kinds of O?H···O hydrogen bonds,such 1Dchains self-assemble into a 3D supramolecular structure stabilized by the offset face-to-faceπ···π*** 2 features a dinuclear structure which,via O?H···O and C?H···O hydrogen bonds,self-assembles into a 2D supramolecular layer strengthened by strong face-to-faceπ···π*** variable-temperature magnetic susceptibilities of 1 and 2 indicate weak antiferromagnetic interactions between the Co(II)and Cu(II)metal ions.

关键词： low-dimensional coordination compounds fluorene derivative magnetic properties

Template-free Synthesis of a Novel 3D Cage-like Nanostructured α-Fe_2O_3

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Chemical Research in Chinese Universities 2009年第6期25卷 963-965页

作者： YU Ran-bo LI Zhen-min WANG Dan XING Chao-jian lai xiao-yong XING Xian-ran Department of Physical Chemistry University of Science and Technology Beijing Beijing 100083 P. R. China State Key Laboratory of Multi-phase Complex System Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 P. R. China Key Laboratory of Ecologic ＆ Recycle Metallurgy Ministry of Education University of Science and Technology Beijing Beijing 100083 P. R. China

Synthesis of inorganic nanostructures with specific size and well defined morphologies has attracted considerable attention due to their superior electrical, optical, magnetic, and chemical properties. Up to now, various kinds of metal oxide, sulfide, and hydrate with controlled hierarchical and complex morphologies have been successfully synthesized.

关键词： Template-free α-Fe2O3 Nanostructure

Synthesis of Ordered Cubic Periodic Mesoporous Silica with High Hydrothermal Stability

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Chemical Research in Chinese Universities 2009年第5期25卷 773-774页

作者： lai xiao-yong TU Jin-chun WANG Hong DU Jiang YANG Mei MAO Dan XING Chao-jian WANG Dan LI xiao-tian College of Materials Science and Engineering Jilin University Changchun 130012 P. R. China State Key Laboratory of Multi-phase Complex System Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 P. R. China

1 Introduction Since its first discovery in 1992, ordered mesoporous silica material with large pore size, high surface area, and high pore volume has attracted great attention for the potentially wide application in catalysis, adsorption, separation, and ion exchange, etc. However, the poor hydrothermal stability of mesoporous silica has limited its wide application in industry. Therefore, in the last 10 years, many studies have been dedicated to improving the hydrothermal stability of mesoporous silica. xiao et al.

关键词： Mesoporous silica Hydrothermal stability Nanocasting Ia3d cubic structure

Syntheses, Crystal Structures and Magnetic Properties of Two New Low-dimensional Manganese (Ⅱ) Coordination Compounds

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Chinese Journal of Structural Chemistry 2020年第6期39卷 1077-1086页

作者： LI Jian-Hua WANG xiao-Zhong WEI Hai-Wen HOU Qin lai xiao-yong LIU Xiang-Yu YANG Qing-Feng State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering National Demonstration Center for Experimental Chemistry EducationCollege of Chemistry and Chemical Engineering Ningxia University Yinchuan 750021China College of Chemistry and Materials Science Shandong Agricultural UniversityTaian 271018China

Two new low-dimensional Mn(Ⅱ)coordination compounds of Mn(H2pimdc)2(phen)(compound 1)and[Mn(Hpimdc)(phen)]n·nH2O(compound 2)were synthesized,where H3pimdc is a 2-propyl-imidazole-4,5-dicarboxylic acid and phen is 1,*** compounds were thoroughly analyzed by X-ray single-crystal diffraction,element analysis,IR spectra,PXRD and thermal analysis.X-ray single-crystal diffraction analyses indicate that the phen ligands terminate metal ions on two sides to prevent the linkage between the neighboring metal ions into a higher dimensional structure in compounds 1 and *** 1 is constructed from mononuclear molecules which form the 1D helical supramolecular chain by N-H···O hydrogen *** compound 2,Hpimdc is a tetradentate bridging ligand,which binds Mn(Ⅱ)ions to generate a single-stranded right helical chain parallel to the b *** 1D chains are additionally coupled by H-bonds as well asπ···πstacking interactions,which formed a 3D supramolecular ***,compound 2 demonstrated temperature-dependent magnetic susceptibility and negative value ofθ(equal to-9.09 K),which is indicative of weak antiferromagnetic interactions between Mn(Ⅱ)ions.

关键词： low-dimensional coordination compounds helical structure magnetic properties

Preparation and Electrode Performance of Ferrihydrites For Rechargeable Lithium Batteries

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Chemical Research in Chinese Universities 2008年第3期24卷 383-384页

作者： WANG Hong lai xiao-yong XIA Wei YU Ran-bo MAO Dan XING Chao-jian YAO Jian-xi WANG Dan LI xiao-tian College of Materials Science and Engineering Jilin University Changchun 130012 P. R. China State Key Laboratory of Multiphase Complex System Institute of Process Engineering Chinese Academy of Sciences Beijing 100080 P. R. China Department of Physical Chemistry University of Science and Technology Beijing Beijing 100083 P. R. China

Now LiCoO2 is the most widely used electrode material in commercial rechargeable lithium-based batteries; however, the toxicity of cobalt and the scarcity of cobalt sources, as well as the limited charge/discharge capacity（130-140 mA.h.g-1） of LiCoO2 electrode drive many efforts to develop various alternative electrode materials, including diverse transition metal oxides and their lithiated counterparts. Amongst them, iron oxides,

关键词： Layered double hydroxide 2-Line ferrihydrite Cathodic material Selective extraction

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具有结晶孔壁介孔镁锌氧复合物(英文)

物理化学学报 2010年第2期26卷 527-530页

作者：耿旺昌赖小勇李晓天西北工业大学理学院西安710072 吉林大学材料科学与工程学院长春130012

以介孔碳为硬模板经过二次填充制备了介孔镁锌氧复合物.采用X射线衍射(XRD),透射电镜(TEM),扫描电镜(SEM),N2吸附脱附等手段对材料的结构及形貌进行了表征.结果表明,所制备的材料在具有高有序介孔结构的同时还具有结晶的孔壁.孔径尺寸均... 详细信息

以介孔碳为硬模板经过二次填充制备了介孔镁锌氧复合物.采用X射线衍射(XRD),透射电镜(TEM),扫描电镜(SEM),N2吸附脱附等手段对材料的结构及形貌进行了表征.结果表明,所制备的材料在具有高有序介孔结构的同时还具有结晶的孔壁.孔径尺寸均为4.0nm,比表面积均为114.5m2.g-1.广角XRD结果初步表明,材料中氧化镁和氧化锌复合形成了固溶体.该材料作为一种半导体材料有望在光学器件领域获得新的应用价值.

关键词：介孔 MgZnO 半导体硬模板法结晶孔壁

Characteristics of gut microbiota dysbiosis in patients with colorectal polyps

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World Journal of Gastrointestinal Oncology 2025年第1期17卷 13-21页

作者： Xian-Rong Wu xiao-Hong He yong-Fang Xie School of Life Health Information Science and Engineering Chongqing Post and Communications UniversityChongqing 400065China

This editorial,inspired by a recent study published in the World Journal of Gastrointestinal Oncology,covers the research findings on microbiota changes in various *** recurrent colorectal polyps,the abundances of Klebsiella,Parvimonas,and Clostridium increase,while those of Bifidobacterium and Lactoba-cillus *** dysbiosis may promote the formation and recurrence of *** microbial changes have also been observed in colorectal cancer,inflammatory bowel disease,autism spectrum disorder,and metabolic syndrome,indicating the role of increased pathogens and decreased probiotics in these *** the gut microbiota,particularly by increasing probiotic levels,may help prevent polyp recurrence and promote gut *** microbial intervention strategy holds promise as an adjunctive treatment for patients with colorectal polyps.

关键词： Recurrent colorectal polyps Gut microbiota dysbiosis Klebsiella Probiotics Intestinal inflammation Microbial intervention strategy

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选择性溶出法制备水铁矿的电化学性能研究

硅酸盐通报 2009年第B08期28卷 82-85页

作者：郑鹏于然波赖小勇夏威王丹北京科技大学冶金与生态工程学院北京100083 中国科学院过程工程研究所多相复杂系统国家重点实验室北京100190

以镁铁类水滑石化合物为前驱体,利用选择性物相溶出法制备了2L-型水铁矿。对产物进行了XRD和N2吸附脱附等表征,并研究了产物的电化学性能。结果表明:这种多孔的2L-型水铁矿具有比表面积大、介孔分布均匀等优点;在电压区间1.5～4.2V,电... 详细信息

以镁铁类水滑石化合物为前驱体,利用选择性物相溶出法制备了2L-型水铁矿。对产物进行了XRD和N2吸附脱附等表征,并研究了产物的电化学性能。结果表明:这种多孔的2L-型水铁矿具有比表面积大、介孔分布均匀等优点;在电压区间1.5～4.2V,电流密度0.318mA/cm2的测试条件下,以Mg/Fe=2(物质的量之比)的水滑石为前驱体制得的样品性能最佳,初始放电比容量在203.8mAh/g,经过14次充放电循环后的放电比容量稳定在100mAh/g上。

关键词：水铁矿类水滑石化合物选择性物相溶出锂离子电池正极材料

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芦荟斑点病病原鉴定及其防治药剂筛选

佛山科学技术学院学报（自然科学版） 2009年第2期27卷 85-87页

作者：徐婧赖晓勇夏瑞中山大学新华学院广东广州510520 华南农业大学园艺学院广东广州510642 广东省农业科学院果树研究所广东广州510640

对芦荟斑点病进行病原鉴定，研究温度对病原菌生长和产孢的影响以及不同杀菌剂对病原菌生长的抑制效果。结果表明，芦荟斑点病是因胶孢炭疽菌（Colletotrichum gloeosporioides Penz.）侵染导致。菌丝生长的温度范围为8-38℃，最适生长... 详细信息

对芦荟斑点病进行病原鉴定，研究温度对病原菌生长和产孢的影响以及不同杀菌剂对病原菌生长的抑制效果。结果表明，芦荟斑点病是因胶孢炭疽菌（Colletotrichum gloeosporioides Penz.）侵染导致。菌丝生长的温度范围为8-38℃，最适生长温度为26-32℃；产生分生孢子的温度范围为12-38℃，最适产孢温度为28-34℃的施保功、甲基托布津对芦荟斑点病病菌丝生长的抑制作用分别为98.7％和97.6％。

关键词：芦荟:斑点病胶胞炭疽菌