Synthesis and Crystal Structure of One-dimensional Chain Zinc(II) Coordination Polymer: {Na[ZnL(H_2O)_2]}_n (L =2-Hydroxyl-2-hydroxylate-malonate Trivalent Anion)

1 INTRODUCTION For a long time much research interest has been focused on coordination polymers because such new coordination polymers may afford new materials with useful properties such as catalytic activity, mi- croporosity, electrical conductivity, …     

一个新的席夫碱——N，N-二甲基甲酰胺水杨酰腙的合成与表征

水杨酰肼和过量的N,N-二甲基甲酰胺(DMF)在三氯氧磷的催化下合成了一种新的席夫碱——N,N-二甲基甲酰胺水杨酰腙,其结构经元素分析和IR确证。研究了可能的反应机理。     

Synthesis and Crystal Structure of One-dimensional Cadmium(II) Coordination Polymer: [Cd_2(DTB)(Bpy)_2(H_2O)_2]n (DTB = 1,4-Dinitro-2,3,5,6-tetracarboxylatebenzene Tetravalent Anion; Bpy = 2,2''''-Bipyridyl)

1 INTRODUCTION Much research interest has been focused on thecoordination polymers for a long time because theymay afford new materials with useful properties,such as catalytic activity, microporosity, electricalconductivity, non-linear optical activit…     

Synthesis and Crystal Structure of a Two-dimensional Zinc(Ⅱ) Coordination Polymer:[Zn2(DTB)(DMF)4(H2O)2]n (DTM= 1,4-Dinitro-2,3,5,6-tetracarboxylatebenzene Tetravalent Anion; DMF = Dimethylformamide)

A two-dimensional coordination polymer [Zn2(DTB)(DMF)4(H2O)2]n has been synthesized by 1,4-dinitro-2,3,5,6-tetracarboxylatebenzenic acid and hydrate zinc perchlorate in the solutions of DMF and H2O. The crystal belongs to the triclinic system, space group P with a = 8.887(6), b = 9.225(6), c = 9.828(7)(°A), α = 85.249(11), β = 74.863(11), γ= 86.510(13)°, V = 774.4(9), Z = 1, C22H32N6O18Zn2, Mr = 799.28, Dc = 1.714 g/cm3, F(000) = 410 and μ= 1.639 mm-1. The structure was refined to R = 0.0539 and wR = 0.1161 for 1584 observed reflections (I ＞ 2б(I)). In the complex there exist two kinds of coordination environments for the zinc(Ⅱ) ions and a two-dimensional sheet is formed via the coordination of carboxylates and zinc(Ⅱ) ions.     

烟酸铬（Ⅲ）配合物的合成及其热分解脱水非等温动力学研

本文报道了一种新的烟酸铬（Ⅲ）的配合物Ｃｒ＿２（ＮｉＣ）＿３Ｃｌ＿３（Ｈ＿２Ｏ）＿３·５Ｈ＿２Ｏ的合成、表征及有关性质的研究。运用Ａｃｈａｒ法￣［１］和Ｃｏａｔｓ－Ｒｅｄｆｅｒｎ法￣［２］对该配合物热分解脱水的非等温动力学过程进行了推断。     

Synthesis and Crystal Structure of Organic Salt (H_2Bpy)(cda)_2 (cda = Carbamyldicyano-methanide Anion; H_2bpy = Hydrogen 4,4''''-Bipyridyl Divalent Cation)

1 INTRODUCTION Polynitrile compound Na(cda) is a very useful ligand and its complexes have been synthesized[1～3], in which the two-dimensional Eu(III) complex exhi- bits the strongest fluorescence and non-linear optic property[4]. We originally want to…     

Synthesis and Crystal Structure of a Three-dimensional Coordination Polymer {[Cd(cda)2]·2CH3OH}n Generated from Cadmium(Ⅱ) and Carbamyldicyanomethanide Anion Bridging Ligand

The three-dimensional coordination polymer {[Cd(cda)2](2CH3OH}n has been syn- thesized by Na(cda) (cda = carbamyldicyanomethanide anion) and hydrated cadmium perchlorate in methanol solution. The crystal belongs to monoclinic, space group C2/c with a = 15.686(3), b = 8.1650(18), c = 13.119(3) (A), β= 119.334(2)°, V = 1464.8(6) (A)3, Z = 4, C10H12CdN6O4, Mr = 392.66, Dc = 1.780 g/cm3, F(000) = 776 and μ = 1.516 mm-1. The structure was refined to R = 0.0248 and wR = 0.0628 for 1176 observed reflections (I ＞ 2σ(I)). The Cd(II) ion is coordinated by two amide- oxygen and four nitrile-nitrogen atoms from six different cda bridging ligands, forming a three- dimensional structure.     

Studies on the Middle-phase Microemulsion of Lauric-N-methylglucamide

The phase behaviour of the middle-phase microemulsion for the quaternary system lauric-N-methylglucamide （MEGA-12）/n-butanollalkane/water has been studied with Winsor type, δ-γ, fishlike and novel ε-β fishlike phase diagrams. A series of phase inversions Winsor I （2）→Ⅲ（3）→Ⅱ （ 2 ） were observed for the three kinds of phase diagrams. The phase types, the phase volumes and the range of alcohol concentrations from the beginning to the end of the middle-phase microemulsion were obtained from Winsor phase diagram. From δ-γ, fishlike phase diagram, the physicochemical parameters, such as the mass fraction of n-butanol in the hydrophile-lipophile balanced inteffacial layer, A^s, the coordinates of the start and end points of the middle-phase microemulsion, and the solubilities of MEGA-12 and n-butanol in alkane phase were calculated. The novel ε-β fishlike phase diagram was also presented. From this kind of diagram, the above experimental phenomena were observed and the physicochemical parameters were calculated precisely. The novel fishlike phase diagram has advantages over the Winsor and δ-γ fishlike phase diagrams in the evaluation of the solubilization power of the microemulsion and calculation of the related physicochemical parameters.     

交联聚合β-环糊精-邻香草醛苯甲酰腙的合成及其应用

合成了交联聚合β-环糊精-邻香草醛苯甲酰腙(β-CDP-OVBH)的新型主体试剂,并进行了IR及NMR结构分析.研究了该主体试剂与铝离子的识别荧光反应,确定了反应的最佳条件,在pH=4.80的HOAc-NH₄OAc缓冲溶液和3.00 mL二甲基甲酰胺(DMF)介质中,主体试剂与客体铝离子配位生成摩尔比β-CDP-OVBH:Al³⁺为1:1的强荧光包合物,建立了测定Al³⁺荧光分析新方法.该方法线性范围为0.67～150 μg/L,检测限0.20 μg/L;通过对27种常见离子干扰实验的研究,显示出该主体试剂对客体铝离子有很高的选择性.该方法能够快速、简便地用于注射液、饮料中痕量铝的测定,结果令人满意.