INFRARED STUDIES OF STRUCTURAL PHASE-TRANSITIONS IN (NH3CH3)(3)SB2I9

被引：12

作者：

BATOR, G

JAKUBAS, R

BARAN, J

RATAJCZAK, H

机构：

[1] UNIV WROCLAW,INST CHEM,PL-50383 WROCLAW,POLAND

[2] POLISH ACAD SCI,INST LOW TEMP & STRUCT RES,PL-50950 WROCLAW,POLAND

来源：

VIBRATIONAL SPECTROSCOPY | 1995年 / 8卷 / 03期

关键词：

INFRARED SPECTROMETRY; METHYLAMMONIUM CATION; PHASE TRANSITION;

D O I：

10.1016/0924-2031(94)00073-P

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Infrared spectra of polycrystalline (NH3CH3)(3)Sb2I9 have been investigated in the temperature range 13-300 K. A systematic temperature dependence study of the internal modes of the methylammonium (MA) cations has been performed. The effect of the dynamic state of MA cations on the vibrational spectra has been observed. The remarkable changes in the infrared spectra appeared at the structural phase transition at 147 K due to the ordering of the MA cations. The phase transition manifests itself as the discontinuous ''order-disorder'' transition.

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收藏

页码：425 / 433

页数：9

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