检索结果-南通市图书馆

Chemical Research in Chinese Universities 2009年第1期25卷 1-4页

作者： SONG Zhe li guang-hua YU Yang SHI Zhan FENG Shou-hua College of Chemistry State Key Laboratory of Inorganic Synthesis and Preparative Chemistry Jilin University Changchun 130012 P. R. China

Hydrothermal reaction between mixed ligand（1,2,4-triazole and benzoic acid） and Zn（NO3）2·6H2O afforded a three-dimensional（3D） metal-organic framework Zn3（C2H2N3）2（C7H5O2）4（C2H2N3=1,2,4-triazole, C7H5O2=benzoic acid）. The compound was crystallized in the hexagonal system with space group R3： a=2.90234（9） nm, b=2.90234（9） nm, c=1.08597（5） nm, γ=120°, V=7.9222（5） nm^3, Mr=816.68, Dc=1.541 g/cm^3, Z=9, F（000）=3708, R=0.0636, and wR=0. 1777. Its structure consists of ZnN2O2 tetrahedron and ZnN204 octahedron, which are connected by 1,2,4-triazole and benzoic acid ligands to form a 3D framework with helical units. This compound forms an interpenetrated NbO topology. The compound was characterized by single-crystal X-ray diffraction, elemental analysis, FTIR spectra, and TGA measurements.

关键词： Hydrothermal synthesis Metal-organic framework 1,2,4-Triazole Benzoic acid Helical units

New Zincophosphite with Infinite One-dimensional [Zn(HPO_3)(H_2PO_3)]~– Chains: Synthesis, Characterizations and Spectral Properties

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2011年第1期27卷 19-22页

作者： WANG Lei LUO Yan-ling WEN Yong-hong li guang-hua FENG Shou-hua Key Laboratory of Eco-chemical Engineering Ministry of Education College of Chemistry and Molecular Engineering Qingdao University of Science and Technology Qingdao 266042 P. R. China State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University Changchun 130012 P. R. China

With dimethylamine as a template, a new one-dimensional zincophosphite （C2H8N）·[Zn（HPO3）（H2PO3）] was prepared under hydrothermal conditions and characterized by single-crystal X-ray diffraction, FTIR spectrametry, elemental analysis, powder X-ray diffraction, and thermogravimetric analysis. The compound crystallized in the Monoclinic space group P2（1）/c, with cell parameters, a=0.78410（9） nm, b=1.54744（2） nm, c=0.81418（1） nm, β=105.8150（1）°, V=0.95049（2） nm3 and Z=4. The connectivity of the ZnO4 tetrahedron and HPO3 pseudo pyramid resulted in inifinite corner-sharing 4-membered ring chains, which were further linked by the protonated amine molecules to form a 3D structure via hydrogen bonds. To the best of our knowledge, this is the first existence of a zincophosphite with the anionic framework composition of [Zn（HPO3）（H2PO3）]-. The compound exhibits intense photoluminescence at room temperature.

关键词： Hydrothermal synthesis Organically-templated Zincophosphite Structural characterization

Construction of Two Chiral Bilayer Coordination Polymers Based on 2-（Pyridine-3-yl）-lH-4,5- imidazoledicarboxylate ligand

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2013年第1期29卷 6-9页

作者： ZHOU Xiao-ying JING Xue-min XU Da YAN Wei-wei li guang-hua ZHANG li-rong State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University Changchun 130012 P. R. China Faculty of Chemistry and Material Science Langfang Teachers College Langfang 065000 P. R. China" College of Science Changchun Institute of Technology Changchun 130012 P. R. China

Two novel isomorphic coordination polymers [Zn（HPyImDC）H20]（1） and [Co（HPylmDC）H20]（2） were synthesized from 2-（pyridine-3-yl）-lH-4,5-imidazoledicarboxylic acid（H3PylmDC） under hydrothermal conditions. Both the compounds crystallized in P21221 chiral space group, possessing left-hand helical chains and right-hand helical chains. Two types of helical chains connected with each other to form an interesting 2D bilayer structure which extended to a 3D supermolecular structure via the hydrogen-bonding interactions. Topology analysis shows that H3PylmDC ligand and metal center can be regarded as 3-connected T-shaped nodes, thus leading to a （3,3）- connected network with vertex symbol of （82.10）.

关键词： Isomorphic Helical chain 2D Bilayer Hydrogen-bonding Fluorescence

Primary Organicamine Templated Indium Iodate (H_2en)KIn(IO_3)_6·2(H_2O) with Hydrogen-bonded Helices

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2010年第1期26卷 1-4页

作者： liU Guo-zong liU Xiao-min DING Hong NING De-kuan li guang-hua SHI Zhan FENG Shou-hua State Key Laboratory of lnorganie Synthesis ＆ Preparative Chemistry College of Chemistry Jilin University Changchun 130012 P. R. China

The first primary organicamine templated indium iodate with the formula （H2en）KIn（IO3）6-2（H2O） was hydrothermally synthesized via reaction at 100 ℃ for 7 d and characterized by single-crystal X-ray diffraction and thermal analysis. The compound crystallized in a triclinic system with space group P1, a=0.69803（14） nm, b=0.70863（14） nm, c=1.2091（2） nm, a=76.417（4）°,β=79.953（4）°, γ=72.206（3）°, V=0.55012（19） nm3. Structure determination indicates that it is made up of zero-dimensional units each of which consists of [In（IO3）6]3 anion, potassium, water and ethylenediamine cation. The most striking feature of the compound is that it possesses helical hydrogen bonds formed by organic amine template, water molecules and inorganic network.

关键词： Hydrothermal synthesis Indium iodate Helical hydrogen bond Crystal structure

Synthesis,Structure and Characterization of Three Metal Molybdate Hydrates:Fe(H_2O)_2(MoO_4)_2·H_3O,NaCo_2(MoO_4)_2(H_3O_2) and Mn_2(MoO_4)_3·2H_3O

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2012年第2期28卷 186-190页

作者： YU Yang liU Dan HU Wei-wei li Jia PENG Yu ZHOU Qi YANG Fen li guang-hua SHI Zhan FENG Shou-hua State Key Laboratory of Inorganic Synthesis&Preparative Chemistry College of ChemistryJilin UniversityChangehun 130012P.R.China

Three metal molybdate hydrates,Fe（H2O） 2（MoO4）2·H3O（FeMo）,NaCo 2（MoO4） 2（H3O2）（CoMo） and Mn 2（MoO4）3·2H3O（MnMo）,were synthesized by the mixed-solvent-thermal methods and characterized by singlecrystal X-ray diffraction.X-Ray photoelectron spectroscopy and bond-valence sums were applied to confirming the valance of Fe,Co,Mn and ***-gravimetric analysis and X-ray powder diffraction measurements indicate that the samples were converted to different structural compounds upon heating in air at 600 ℃ for 1 *** magnetic properties of these compounds were *** dominant magnetic interactions are antiferromagnetic in ***,different synthesis conditions led to the diversity of magnetic properties of compound CoMo.

关键词： Mixed-solvent-thermal synthesis Crystal structure Transition metal molybdate Magnetic property

Single Crystal of Lanthanum Hydroxide La（OH）3： Controlled Synthesis by High Pressure Flux Method and Its Growth Mechanism

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2013年第5期29卷 825-827页

作者： li Ben-xian liU Xiao-yang CHU Qing-xin li guang-hua WANG Xiao-feng ZHAO Xu-dong State Key Laboratory of lnorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University Changehun 130012 P. R. China College of Earth Science Jilin University Changehun 130061 P R. China

High pressure synthesis of solid material tends to increase the density, coordination number, symmetry of material and shorten bond length. The solid synthesized at a high pressure and decompressed to ambient pressure often exhibits a meta- stable ＂stretched＂ state, within the high pressure stability field. The crystal grown at a high pressure is of great importance with the development of high pressure technology. Crystal growth is an important factor in the material synthesis. And many me- thods including gas, solid and solution methods have been used to obtain various single crystalstl]. Especially, flux method is an important method for crystal growth, where the components of the desired substance dissolved in a solvent（flux） grow in the process of deposit.

关键词： Lanthanum hydroxide High pressure Flux method Single crystal

Temperature-controlled Hydrothermal Synthesis of Copper(Ⅰ or Ⅱ) Coordination Polymers via a Variety of Copper Coordination Modes

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2012年第4期28卷 581-584页

作者： QU Xue-jian WANG Shuang ZHANG Dao-jun JING Xue-min ZHANG li-rong li guang-hua HUO Qi-sheng liU Yun-ling State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012P.R.China

Two 1D coordination polymers Cu2I（C6N3H4）2（1） and CuⅡ（C6N3H4）2·H2O（2） based on benzotriazole（Bta） were hydrothermally synthesized by controlling the crystallization ***-crystal X-ray diffraction（XRD） analyses reveal that compound 1 is a 1D tubular structure constructed from two types of 1D chains {―Cu―N=N―N―} n,where the Cu（I） ions adopt linear,triangular,and tetrahedral coordination modes to connect two types of Bta ligands via π-π interaction inside the tubular-like *** compound 2,the Cu（Ⅱ） ions assume a quadrilateral coordination mode linking to the Bta ligands to give 1D straight chains,which stacks through π-π interactions to construct a 2D layer *** characterizations including elemental analyses,infrared IR spectra,thermogravimetric（TG） analyses and luminescence properties have been done.

关键词： Hydrothermal synthesis Coordination mode Copper coordination polymer

一种新的有机光致变色及热致变色化合物间氨基苯甲酸缩3,5-二氯水杨醛希夫碱

在线全文

学校读者我要写书评

暂无评论

发光学报 2011年第11期32卷 1115-1119页

作者：李光华丁国华桂林理工大学化学与生物工程学院有色金属及材料加工新技术教育部重点实验室广西桂林541004

制备了间氨基苯甲酸缩3,5-二氯水杨醛希夫碱,利用红外(IR)、核磁(1H NMR)、质谱(MS)和元素分析对化合物结构进行了表征。研究了它的荧光性质和热稳定性。对化合物的紫外可见(UV-Vis)光谱和荧光光谱的研究表明,该化合物在DMF溶液中具有... 详细信息

制备了间氨基苯甲酸缩3,5-二氯水杨醛希夫碱,利用红外(IR)、核磁(1H NMR)、质谱(MS)和元素分析对化合物结构进行了表征。研究了它的荧光性质和热稳定性。对化合物的紫外可见(UV-Vis)光谱和荧光光谱的研究表明,该化合物在DMF溶液中具有较好的光致变色和热致变色性能。化合物的吸光度值和最大发射波长与时间或温度呈线性关系,进一步说明该化合物是性能良好的光致变色及热致变色材料。

关键词：希夫碱光致变色热致变色

在线全文

学校读者我要写书评

暂无评论

“果然”与“■”的语义对比

汉语学习 2021年第5期 85-93页

作者：李光华延边大学朝汉文学院吉林延吉133002

本文对比分析现代汉语"果然"和与之相应的韩国语汉字词"■"。研究发现,二者都表示"事实与所说或所料相符",但还有很多不同之处。可以说,二者在各自的语言系统中有着不同的发展路径。前者的语义逐渐缩小,而后者的语义基本保持不变并有所... 详细信息

本文对比分析现代汉语"果然"和与之相应的韩国语汉字词"■"。研究发现,二者都表示"事实与所说或所料相符",但还有很多不同之处。可以说,二者在各自的语言系统中有着不同的发展路径。前者的语义逐渐缩小,而后者的语义基本保持不变并有所发展,导致前者语义单一、后者语义丰富,形成严重不平衡的格局。然而,韩国语"■"丰富的语义并非凭空而来,大部分可以在汉语发展史上找到其根源。

关键词： “果然” “■” 语义预期对比

量子代数su_q(2)q相干态的耦合q积分核(英文)

在线全文

学校读者我要写书评

暂无评论

长沙水电师院学报（自然科学版） 2000年第1期15卷 72-76页

作者：李光华长沙电力学院物理系湖南长沙410077

当量子代数suq(2 )的两个不可约表示作余积时 ,引入耦合 q积分核将suq(2 )的耦合 q相干态与未耦合 q相干态联系起来 ,讨论了这种积分核与量子CG系数的关系和它的正交归一性 .

关键词： q相干态耦合q积分核 q-CG系数量子代数