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首页> 外文期刊>Crystal growth & design >Novel Metal-Organic Frameworks with Specific Topology Formed through Noncovalent Br···Br Interactions in the Solid State
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Novel Metal-Organic Frameworks with Specific Topology Formed through Noncovalent Br···Br Interactions in the Solid State

机译：通过固态非共价Br···Br相互作用形成具有特定拓扑结构的新型金属有机骨架

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摘要

Two coordination polymers [Ag(bib)]NO_3·H_2O (1) and [Ag(bib)]ClO_4 (2) with one-dimensional (1D) chain structure were synthesized by reactions of ditopic ligand containing imidazole donors, namely, 1-bromo-3,5-bis(imidazol-1-ylmethyl)benzene (bib), with corresponding silver salts. While the bib ligand reacted with ditopic diacetato-zinc(II) acceptors, M_2L_2-type metallocyclic ring-like complex [Zn_2(bib)_2(OAc)_4]·2H_2O (OAc = acetate anion) (3) was obtained, which was further connected by Br···Br interactions to lead to the formation of 1D pseudo-polyrotaxane. When ligand bib reacted with Zn(NO_3)_2·6H_2O and Mn(NO_3)_2, two complexes [Zn(bib)_2(H_2O)_2](NO_3)_2·2H_2O (4) and [Mn(bib)_2(H_2O)_2](NO_3)_2·2H_2O (5) with 2D network structure were obtained in which the metal atoms had octahedral coordination geometry. The structures of these coordination complexes were determined by X-ray crystallography, and the results revealed that the coordination geometry of metal atoms have a great impact on the structure of the supramolecular architectures. Furthermore, the nitrate anions located in the voids between the 2D cationic layers in 4 can be exchanged by nitrite anions, which means that complex 4 with 2D network structure has anion exchange properties.
机译：通过含咪唑供体的对位配位体反应合成了具有一维（1D）链结构的两种配位聚合物[Ag（bib）] NO_3·H_2O（1）和[Ag（bib）] ClO_4（2）。溴3,5-双（咪唑-1-基甲基）苯（围嘴），带有相应的银盐。当bib配体与对位双乙酰基锌（II）受体反应时，获得M_2L_2型金属环状复合物[Zn_2（bib）_2（OAc）_4]·2H_2O（OAc =乙酸根阴离子）（3）通过Br···Br相互作用进一步连接导致一维假聚轮烷的形成。当配体围嘴与Zn（NO_3）_2·6H_2O和Mn（NO_3）_2反应时，两个络合物[Zn（bib）_2（H_2O）_2]（NO_3）_2·2H_2O（4）和[Mn（bib）_2（H_2O） ）_2]（NO_3）_2·2H_2O（5）具有二维网络结构，其中金属原子具有八面体配位几何。这些配位配合物的结构是通过X射线晶体学确定的，结果表明金属原子的配位几何形状对超分子结构的结构有很大的影响。此外，位于4中的2D阳离子层之间的空隙中的硝酸根阴离子可以被亚硝酸根阴离子交换，这意味着具有2D网络结构的配合物4具有阴离子交换性质。

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