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首页> 外文期刊>Phase Transitions >Structural characterization, thermal, ac conductivity and dielectric properties of (C7H12N2)(2)[SnCl6]Cl-2 center dot 1.5H(2)O
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Structural characterization, thermal, ac conductivity and dielectric properties of (C7H12N2)(2)[SnCl6]Cl-2 center dot 1.5H(2)O

机译:(C7H12N2)(2)[SnCl6] Cl-2中心点1.5H(2)O的结构表征,导热,交流电导率和介电性能

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摘要

(C7H12N2)(2)[SnCl6]Cl-2 center dot 1.5H(2)O is crystallized at room temperature in the monoclinic system (space group P2(1)). The isolated molecules form organic and inorganic layers parallel to the (a, b) plane and alternate along the c-axis. The inorganic layer is built up by isolated SnCl6 octahedrons. Besides, the organic layer is formed by 2,4-diammonium toluene cations, between which the spaces are filled with free Cl- ions and water molecules. The crystal packing is governed by means of the ionic N-H center dot center dot center dot Cl and Ow-H center dot center dot center dot Cl hydrogen bonds, forming a three-dimensional network. The thermal study of this compound is reported, revealing two phase transitions around 360(+/- 3) and 412(+/- 3) K. The electrical and dielectric measurements were reported, confirming the transition temperatures detected in the differential scanning calorimetry (DSC). The frequency dependence of ac conductivity at different temperatures indicates that the correlated barrier hopping (CBH) model is the probable mechanism for the ac conduction behavior.
机译:(C7H12N2)(2)[SnCl6] Cl-2中心点1.5H(2)O在室温下在单斜晶系中结晶(空间群P2(1)/ n)。分离的分子形成平行于(a,b)平面并沿c轴交替的有机层和无机层。无机层由孤立的SnCl6八面体组成。此外,有机层是由2,4-二甲基甲苯阳离子形成的,在它们之间的空间充满了自由Cl-离子和水分子。通过离子N-H中心点中心点中心点Cl和Ow-H中心点中心点中心点Cl氢键控制晶体堆积,形成三维网络。据报道,对该化合物进行了热研究,发现在360(+/- 3)和412(+/- 3)K附近出现了两个相变。报告了电学和介电测量,证实了在差示扫描量热法中检测到的转变温度( DSC)。交流电导率在不同温度下的频率依赖性表明,相关势垒跳跃(CBH)模型是交流电传导行为的可能机制。

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