Synthesis, crystal structure, thermal and dielectric properties of tetrapropylammonium tetrachloroantimonate(III)

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• 作者：N. Weslati^a ; ^{najouamass3oud.18@gmail.com" class="auth_mail} ; I. Chaabane^a ; A. Bulou^b ; F. Hlel^a
• 关键词：Tetrapropylammonium tetrachloroantimonate(III) ; X-ray diffraction ; Dielectric properties
• 刊名：Physica B
• 出版年：15 May, 2014
• 年：2014
• 卷：441
• 期：Complete
• 页码：42-46
• 全文大小：1319 K

文摘

The new organic-inorganic compound, tetrapropylammonium tetrachloroantimonate(III), [N(C₃H₇)₄][SbCl₄], crystallizes at room temperature in the monoclinic system (P2₁/c space group) with the following unit cell parameters: a=18.1973(5) 脜, b=15.7225(4) 脜, c=15.7225 (3) 脜, 尾=91.65(1)掳 and Z=4. The atomic arrangement can be described by a stacking of organic-inorganic layers along a direction. Each layer is made up by two types of tetrapropylammonium cations and two types of distorted tetrachloroantimonate(III) anions. Differential scanning calorimetry studies indicate a presence of two order-disorder phase transitions located at 343 K and 363 K. Besides, an analysis of the dielectric constants 蔚', 蔚鈥?and loss tangent (tan(未)) versus temperature, at several frequencies, shows a distribution of relaxation times. This relaxation is probably due to the reorientational dynamics of alkyl chains.