3D zinc(II) coordination polymers built up by triazole and benzene-polycarboxylate anions: Synthesis, crystal structure, thermal and photoluminescence characterization
3D zinc(II) coordination polymers built up by triazole and benzene-polycarboxylate anions: Synthesis, crystal structure, thermal and photoluminescence characterization
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DOI：
10.1016/j.poly.2009.04.008
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发表时间：
2009-07
期刊：
影响因子：
2.6
通讯作者：
D. S. Chowdhuri;Abhinandan Rana;Madhusudan Bera;E. Zangrando;S. Dalai
中科院分区：
文献类型：
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作者：
D. S. Chowdhuri;Abhinandan Rana;Madhusudan Bera;E. Zangrando;S. Dalai
合成了两种配位聚合物[Zn 5（tmaH）4（trz）2（H2O）4]（1）和[Zn 3（bta）（trz）2（H2O）4]·2 H2O（2）[tmaH 3 =苯-1，3，5-三羧酸/均苯三甲酸，trzH= 1，2，4-三唑，btaH 4 =苯-1，2，4，5-四羧酸]，并通过X射线单晶衍射对其结构进行了表征.这两种配合物均为含[Zn 4（trz）2]单元的三维配位聚合物。特别地，在1的网络中概述了含有6元和18元环的波状层。氢键，涉及协调和晶格水分子与羧酸氧原子，有助于网络的稳定。通过热重分析研究了它们的热稳定性。1的荧光光谱在419和323 nm处具有两个峰，分别来自配体内的π-π π π跃迁和LMCT。对于2，在410 nm处的宽带仅被指定为π-π配体内跃迁。
Two coordination polymers of the formula [Zn5(tmaH)4(trz)2(H2O)4] (1) and [Zn3(bta)(trz)2(H2O)4]·2H2O (2) [tmaH3=benzene-1,3,5-tricarboxylic acid/trimesic acid, trzH=1,2,4-triazole, btaH4=benzene-1,2,4,5-tetracarboxylic acid] have been synthesized and structurally characterized by X-ray single crystal diffraction analysis. Both complexes are 3D coordination polymers containing [Zn4(trz)2] units connected by benzene-carboxylate anions. In particular, an undulated layer containing 6- and 18-membered rings is outlined in the network of 1. Hydrogen bonds, involving the coordinated and lattice water molecules with carboxylate oxygen atoms, contribute to the stabilization of the networks. Their thermal stability was investigated by thermogravimetric analysis. The fluorescence spectrum of 1 features two peaks at 419 and 323nm, originating from a π–π∗ intraligand transition and LMCT, respectively. For 2 a broad band at 410nm is assigned solely as a π–π∗ intraligand transition.