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首页> 外文期刊>Crystal growth & design >Time- and Temperature-Dependent Study in the Three-Component Zinc-Triazolate-Oxybis(benzoate) System: Stabilization of New Topologies
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Time- and Temperature-Dependent Study in the Three-Component Zinc-Triazolate-Oxybis(benzoate) System: Stabilization of New Topologies

机译:三组分三唑锌-氧-双(苯甲酸酯)系统中随时间和温度变化的研究:稳定新拓扑

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摘要

Three new three-dimensional zinc-triazolate-oxybis(benzoate) compounds. [{Zn-3(H2O)(2)}{C12H8O(COO)(2)}(2)-{C2H2N3}(2)]center dot 2H(2)O(I), [Zn-7{C12H8O(COO)(2)}(4){C2H2N3}(6)]center dot H2O, (II), and[{Zn-5(OH)(2)}{C12H8O(COO)(2)}(3){C2H2N3}(2)] (III), synthesized by a hydrothermal reaction of a mixture of Zn(OAc)(2)center dot 2H(2)O, 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 degrees C and compound III at 200 degrees C. The compounds have been characterized by single-crystal X-ray diffraction, powder X-ray diffraction. thermogravimetric analysis, IR, and photoluminescence studies.
机译:三个新的三维三唑锌-氧双(苯甲酸酯)化合物。 [{Zn-3(H2O)(2)} {C12H8O(COO)(2)}(2)-{C2H2N3}(2)]中心点2H(2)O(I),[Zn-7 {C12H8O( COO)(2)}(4){C2H2N3}(6)]中心点H2O,(II)和[{Zn-5(OH)(2)} {C12H8O(COO)(2)}(3){ C2H2N3}(2)](III),通过水热反应合成Zn(OAc)(2)中心点2H(2)O,4,4'-氧双(苯甲酸),1,2,4 -三唑,NaOH和水。化合物I具有互穿的金刚石结构,化合物II和III具有与柱层相关的结构。在低温下形成水合相(I),在高温下形成完全脱水的相(III),表明热力学因素在形成三种化合物中的重要性。 I在水的存在下的转化研究表明,在150和180摄氏度下形成简单的Zn-OBA化合物[Zn(OBA)(H2O)](IV),在200摄氏度下形成化合物III。通过单晶X射线衍射,粉末X射线衍射进行表征。热重分析,红外和光致发光研究。

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