Infrared studies on structural phase transition in [N(CH3)(4)](3)Bi2Br9

Authors
Czupinski, O Bator, G Jakubas, R
Citation
O. Czupinski et al., Infrared studies on structural phase transition in [N(CH3)(4)](3)Bi2Br9, SPECT LETT, 33(2), 2000, pp. 269-282
Citations number
15
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences
Journal title
SPECTROSCOPY LETTERS
ISSN journal
00387010 → ACNP
Volume
33
Issue
2
Year of publication
2000
Pages
269 - 282
Database
ISI
SICI code
0038-7010(2000)33:2<269:ISOSPT>2.0.ZU;2-H
Abstract
FT-IR (4000 - 400 cm(-1)) spectroscopy was used for the study of the phase transition at 183 K in [N(CH3)(4)](3)Bi2Br9. The changes in the spectra con firmed the presence of the phase transition of first order type at 183 K. T he most spectacular changes in the vicinity of the phase transition are fou nd for the stretching CH3 and skeletal NC4 modes. The mechanism of the phas e transition of the order-disorder type is believed to be connected with th e reorientation motions of the tetramethylammonium cation.