Alternating-current conductivity and dielectric relaxation of bulk iodoargentate

An inorganic-organic hybrid compound Cu(en)(2)Ag2I4 (en = ethylenediamine) (1) was synthesized and single crystal structurally characterized. Along the [001] direction, the inorganic parts form an infinite 1-D chain and [Cu(en)(2)](2+) cations are separated by inorganic chain. The electrical conductivity and dielectric properties of 1 have been investigated over wide ranges of frequency. The alternating-current conductivities have been fitted to the Almond-West type power law expression with use of a single value of S. It is found that S values for 1 are nearly temperature-independent, which indicates that the conduction mechanism could be quantum mechanical tunneling (QMT) model. The dielectric loss and electric modulus show single dielectric relaxation process. The activation energy obtained from temperature-dependent electric modulus compare with the calculated from the dc conductivity plots. (C) 2015 Elsevier Ltd. All rights reserved.

合成了一种无机 - 有机杂化化合物Cu(en)(2)Ag2I4（en = 乙二胺）（1），并对其单晶进行了结构表征。沿着[001]方向，无机部分形成无限的一维链，[Cu(en)(2)](2+)阳离子被无机链分隔开。在较宽的频率范围内研究了化合物1的电导率和介电性能。利用单一的S值将交流电导率拟合为阿尔蒙德 - 韦斯特型幂律表达式。发现化合物1的S值几乎与温度无关，这表明其传导机制可能是量子力学隧穿（QMT）模型。介电损耗和电模量呈现单一的介电弛豫过程。从与温度相关的电模量得到的活化能与从直流电导率曲线计算得到的活化能进行了比较。（C）2015爱思唯尔有限公司。保留所有权利。