Synthesis, crystal structure, thermal and dielectric properties of tetrapropylammonium tetrabromozincate [N(C3H7)4]2[ZnBr4] compound

被引：15
|
作者：
Chkoundali, Souad [1 ]
Hlel, Faouzi [2 ]
Khemekhem, Hamadi [1 ]
机构：
[1] Univ Sfax, Fac Sci Sfax, Lab Mat Multifonct & Applicat LaMMA, Sfax 3018, Tunisia
[2] Univ Sfax, Fac Sci Sfax, Lab Etat Solide, BP 802, Sfax 3018, Tunisia
来源：
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2016年 / 122卷 / 12期
关键词：
ORGANIC-INORGANIC HYBRID; PHASE-TRANSITIONS; SPECTROSCOPY; IMPEDANCE;
D O I：
10.1007/s00339-016-0596-4
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The new organic-inorganic compound tetrapropylammonium tetrabromozincate [N(C3H7)(4)](2)ZnBr4 has been synthesized and characterized by single-crystal X-ray diffraction, differential scanning calorimetry, IR, Raman and impedance measurements. The crystal structure refinement shows that the [N(C3H7)(4)](2)ZnBr4 compound is crystallized in the monoclinic system (space group C-2/c) with the following unit cell parameters: a = 33.145(5) angstrom, b = 14.234(3) angstrom,c = 15.081(2) angstrom, beta = 110.207(5)degrees and Z = 8. The structural arrangement of the title compound can be described as an alternation of organic and inorganic layers along the [100] direction. Differential scanning calorimetry disclosed two order-disorder transition phases located at 340 and 393 K. Besides, an analysis of the dielectric constants epsilon' and epsilon '', at several frequencies, shows a distribution of relaxation times. This relaxation is probably due to the reorientational dynamics of alkyl chains.
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页数：8
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