Structural phase transitions in dimethylammonium perchlorate

Raman and infrared spectra (20–5000 cm −1) of (CH 3) 2NH 2ClO 4 and its N-deuterated analogue were investigated in the temperature range 90–350 K. A temperature dependent study of widths and frequencies of prominent bands confirms (a) the existence of phase transitions at 309 and 311 K and (b) in th...

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Bibliographic Details
Published in:Chemical physics letters 1991-07, Vol.182 (2), p.175-179
Main Authors: Srinivasan, T.K.K., Mylrajan, M.
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Equations of state, phase equilibria, and phase transitions
Exact sciences and technology
Physics
Specific phase transitions
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Summary:Raman and infrared spectra (20–5000 cm −1) of (CH 3) 2NH 2ClO 4 and its N-deuterated analogue were investigated in the temperature range 90–350 K. A temperature dependent study of widths and frequencies of prominent bands confirms (a) the existence of phase transitions at 309 and 311 K and (b) in the high temperature phases II and I, the cations and anions undergo reorientational motions.
ISSN:0009-2614
1873-4448
DOI:10.1016/0009-2614(91)80124-G