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Raman scattering in a [(CH3)2NH2]5Cd3Cl11 crystal

✍ Scribed by R. Sobiestianskas; K. Abe; T. Shigenari

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 241 KB
Volume: 29
Category: Article
ISSN: 0377-0486
DOI: 10.1002/(sici)1097-4555(199805)29:5<399::aid-jrs252>3.0.co;2-x

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✦ Synopsis

Raman spectra of (DMAPCC) single crystals were studied over the range 10-3200 cm-1

Cl 11 between 100 and 360 K. The changes in the external and internal mode region were observed and characterized. In particular, the symmetric stretching vibration of the dimethylammonium (DMA) group at 890 cm-1 splits continuously over the temperature range 360-110 K. The analysis of the DMA stretching mode based on an orderdisorder model showed the presence of competition between long-range interactions in the disordered DMA(3) subsystem and short-range interactions between anions and cations. The change in the wavenumber behaviour of the 893 cm-1 mode corroborated the presence of a phase transition at 170 K.

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