间苯二甲酸连接的氢键导致的二维锌配位聚合物的合成及晶体结构

由于配位聚合物在催化材料,磁性材料和光学材料等领域内具有广泛的 应用价值,近年来人们已经合成了不少多维配位聚合物,并对其进行了结构鉴定和性质研究。配位聚合物一般都是通过体系内的配位键、氢键,和金属－金属间相互作用等作用力形成。在大多数的体系中,一般采用含氮基团,如4,4－联吡啶,2,4,6－三（4－吡啶基）－1,3,5－三嗪,1,4－二咪唑丁胺等作为桥连配体合成具有各种不同拓扑结构的无限伸展体系。同时,利用含氧基团作为桥基合成各类配位聚合物也是一个重要的途径,一般为多酸体系,如1,3,5－三苯甲酸,马来酸等。我们通过分子自组装作用,合成了一例由间苯二甲酸作桥基通过氢键导致的金属锌的二维配位聚合物,通过单晶X－射线衍射,研究了它的结构。     

Synthesis and Crystal Structure of an Infinite 1D Zigzag Chain Compound (dimbH~+)(ClO_4~-) and Its Comparison with (dimb)2H_2O (dimb = 1,3-Di(imidazol-1-ylmethyl)-5-methylbenzene)

1 INTRODUCTION Recently the rational design and preparation of novel functional materials are one of the highlights in supramolecular chemistry and crystal engi- neering[1]. How to control the molecular structures and topology in the process of self-assembly has attracted extensively attention[2]. To date, a lot of complexes containing well-designed bidentate[3～6], tripodal[7, 8] and hexadentate[9] imidazole moiety ligands have been synthesized by chemists. Some of them have interestin…     

铜(Ⅱ)离子导向的自组装研究

A few copper(Ⅱ) ions or groups have been designed and investigated for metal-assisted self assembly. Reactions of these metal units with a number of linear bridging ligands have led to the production of some dinuclear copper(Ⅱ) complexes and coordination polymers in which metal centers are all five-coordinate in the configuration of a square pyramid or a triangular bipyramid.     

痕量间苯二酚的动力学荧光分析

在硫酸介质中,痕量间苯二酚对甲醛催化氯酸钾氧化罗丹明B使其荧光猝灭具有抑制作用,据此建立了动力学荧光法测定痕量间苯二酚的新方法.方法的线性范围为0.016～0.240mg@L-1,检出限为0.009mg@L-1.此法用于自来水样中间苯二酚含量的测定,并进行了加标回收试验,回收率在98%～103%之间.     

Synthesis,Crystal Structure and Magnetic Properties of a Ni（Ⅱ） Supramolecular Complex Based on Aromatic Polycarboxylate Ligand

A Ni(Ⅱ) supramolecular complex,[Ni 2 (btec)(3py) 2 (H 2 O) 8 ](H 2 O) 4 (1),has been synthesized by Ni(ClO 4) 2 ·6H 2 O,benzene-1,2,4,5-tetracarboxylic acid (H 4 btec) and terminal ligand 3-hydroxypyridine (3py) in aqueous solution.The title compound crystallizes in triclinic system,space group P1,with a=8.5637(12),b=9.4138(13),c=10.3611(14),α=67.9540(10),β=85.1740(10),γ=76.9890(10)°,V=754.33(18) 3,Z=2,M r=386.96,D c=1.704 Mg/m 3,μ=1.345 mm-1,F(000)=402,the final R=0.0222 and wR=0.0563 for 2675 observed reflections with I > 2σ(Ⅰ).The adjacent discrete molecules are further self-assembled by intermolecular π-π and O-H···O hydrogen bonding interactions to construct a 3D supramolecular framework.Magnetic measurement shows weak ferromagnetic interaction in the range of 2～300 K.     

Synthesis and Crystal Structure of a New Supramolecular Compound Constructed from Flexible 1,1'-(1,4-Butanediyl)bis(imidazole)and 1,2,4,5-Benzenetetracarboxylic Acid

A new bis(imidazolium) compound,[H2L(H2btec)2]·H4btec(1,L=1,1'-(butane-1,4-diyl)bis(imidazole),H4btec=1,2,4,5-benzenetetracarboxylatic acid),has been synthesized and structurally characterized by single-crystal X-ray diffraction.The title compound crystallizes in the monoclinic system,space group Pnma,with a=13.3908(11),b=13.9249(12),c=16.2166(14),V=2957.6(4)3,Z=4,Mr=698.55,Dc=1.569 mg/m3,F(000)=1448,μ(MoKα)=0.130 mm-1,the final R=0.0584 and wR=0.1538 for 4295 observed reflections with I>2σ(I).The compoun...     

苯磺酰β-丙氨酸镨配合物的合成及晶体结构

合成了配合物{[Pr2 L6 (H2O)4]?H 2O}n (L = 苯磺酰b-丙氨酸), 并通过单晶X射线衍射确定了晶体结构。化合物(C27H41.21N3O17.6PrS3)属单斜晶系, 空间群P21 /n, 晶胞参数:a = 9.412(1), b = 18.019(2), c = 22.522(4) , b = 100.43(1), Z = 4, Mr = 926.59, Dc = 1.638 g/cm3, V = 3756.3(8) 3, F(000) = 1888, m = 1.540 mm1 。PrⅢ离子为9配位的单帽四方反棱柱结构, 羧基氧原子与镨原子间存在3种配位方式, 镨原子之间通过2种类型的羧基连接使配合物分子呈无限链状结构。