摘要
常温水溶液中用1H-1,2,4-三唑-3,5-二羧酸(H3adctrz)与醋酸锌反应得到配位聚合物1H-1,2,4-三唑-3,5-二羧酸锌[Zn(Hadctrz)(H2O)3)]n,单晶经同步辐射光源衍射分析、元素分析、红外光谱进行了表征。晶体结构分析给出该配合物结晶为单斜晶系为14号空间群P21/c,其中Zn离子与氧、氮原子采取扭曲的八面体构型,价键总和(BVS)计算锌的氧化态是+2,相邻的锌离子通过μ1,4-Hadctrz桥联形成一维"之"字型结构,链间通过分子间氢键作用扩展为二维网状结构。锌离子配位使1H-1,2,4-三唑-3,5-二羧酸在DMSO溶液中的荧光淬灭。
One dimension complex[Zn(Hdctrz) H2O]n,(H3dctrz,1H-1,2,4-triazole-3,5-dicarboxylic acid) has been synthesized under room temperature and characterized by Synchrotron Radiation Facility(SRF),elemental analysis,IR.Crystal structural analysis reveals that the complex crystallizes in monoclinic system with space group P21/c.Centre zinc ion displays a slightly distorted octahedral geometry.Bond valence sum(BVS) model calculation is also performed to assign the oxidation number of the zinc center.The adjacent Zn cations are linked by a μ1,4-Hadctrz forming one dimensional zigzag chains.Further,these 1D chains form 2D networks by intermolecular hydrogen bonds.The fluorescence spectra of the ligands and complex 1 in DMSO show the addition of zinc can result in fluorescence quenching of ligands.
引文
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