Novel metal-organic frameworks with specific topology formed through noncovalent Br•••Br interactions in the solid state
Novel metal-organic frameworks with specific topology formed through noncovalent Br•••Br interactions in the solid state
复制标题
DOI：
10.1021/cg034190b
复制
发表时间：
2004-05-01
影响因子：
3.8
通讯作者：
Ueyama, N
中科院分区：
文献类型：
--
作者：
Fan, J;Sun, WY;Ueyama, N
两种配位聚合物[Ag(bib)]NO3。以含咪唑给体1-溴-3,5-双（咪唑-1-基甲基）苯（bib）为配体，与相应的银盐反应，合成了具有一维（1D）链结构的H2O(1)和[Ag(bib)]ClO4(2)。而bib配体与双异位双乙酰锌（II）受体反应，m2l2型金属环状配合物[Zn-2(bib)(2)(OAc)(4)]。得到2H(2)O （OAc =乙酸阴离子）(3)，通过Br…Br相互作用导致1D伪聚轮烷的形成。配体bib与Zn(NO3)(2)反应。6 h (2) O和Mn(3号)(2),两个复合物(锌(龙头)(2)(H2O)(2)(三)(2)。2H(2)O(4)和[Mn(bib)(2)(H2O)(2)](NO3)(2)。得到了具有二维网络结构的2H(2)O(5)，其中金属原子具有八面体配位几何。通过x射线晶体学对配合物的结构进行了表征，结果表明金属原子的配位几何形状对配合物的超分子结构有很大影响。此外，位于4中二维阳离子层之间空隙中的硝酸盐阴离子可以被亚硝酸盐阴离子交换，这意味着具有二维网络结构的配合物4具有阴离子交换性质。
Two coordination polymers [Ag(bib)]NO3.H2O (1) and [Ag(bib)]ClO4 (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, M2L2-type metallocyclic ring-like complex [Zn-2(bib)(2)(OAc)(4)].2H(2)O (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(NO3)(2).6H(2)O and Mn(NO3)(2), two complexes [Zn(bib)(2)(H2O)(2)](NO3)(2).2H(2)O (4) and [Mn(bib)(2)(H2O)(2)](NO3)(2).2H(2)O (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.