Time- and Temperature-Dependent Study in the Three-Component Zinc-Triazolate-Oxybis(benzoate) System: Stabilization of New Topologies
Time- and Temperature-Dependent Study in the Three-Component Zinc-Triazolate-Oxybis(benzoate) System: Stabilization of New Topologies
复制标题
DOI：
10.1021/cg900397r
复制
发表时间：
2009-06
影响因子：
3.8
通讯作者：
Partha Mahata;M. Prabu;S. Natarajan
中科院分区：
文献类型：
--
作者：
Partha Mahata;M. Prabu;S. Natarajan
三个新的三维三唑氧双锌配合物以乙酸锌（Zn（OAc）2·2 H2O）、乙酸乙酯（COO）2·2 H2O、乙酸乙酯（OH）2·2 H2O、乙酸乙酯（COO）2·2 H2O、乙酸乙酯（COO）2·2 H2O、乙酸乙酯（COO）2·2 H2O、乙酸乙酯（COO）2·2 H2O为原料，4，4 ′-氧代双（苯甲酸）、1，2，4-三唑、NaOH和水。化合物I具有互穿金刚石结构，并且II和III具有柱撑层相关结构。在低温下形成水合相（I）和在高温下形成完全脱水相（III）表明热力学因素在三种化合物形成中的重要性。I在水存在下的转化研究表明，在150和180 ° C下形成简单的Zn-OBA化合物[Zn（OBA）（H2O）]（IV），在200 °C下形成化合物III。通过X-射线单晶衍射、X-射线粉末衍射、热重分析、红外光谱和光致发光等手段对化合物进行了表征。
Three new three-dimensional zinc-triazolate-oxybis(benzoate) compounds, [{Zn3(H2O)2}{C12H8O(COO)2}2{C2H2N3}2]·2H2O (I), [Zn7{C12H8O(COO)2}4{C2H2N3}6]·H2O, (II), and [{Zn5(OH)2}{C12H8O(COO)2}3{C2H2N3}2] (III), have been synthesized by a hydrothermal reaction of a mixture of Zn(OAc)2·2H2O, 4,4′-oxybis(benzoic acid), 1,2,4-triazole, NaOH, and water. Compound I has an interpenetrated diamond structure and II and III have pillared-layer related structures. The formation of a hydrated phase (I) at low temperature and a completely dehydrated phase (III) at high temperature suggests the importance of thermodynamic factors in the formation of three compounds. Transformation studies of I in the presence of water shows the formation of a simple Zn-OBA compound, [Zn(OBA)(H2O)] (IV), at 150 and 180 °C and compound III at 200 °C. The compounds have been characterized by single-crystal X-ray diffraction, powder X-ray diffraction, thermogravimetric analysis, IR, and photoluminescence studies.