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Inne
Study of the structural phase transitions of (CH3NH3)3Sb2Cl9 (MACA) and (CH3NH3)3Bi2Cl9 (MACB) by infrared spectroscopy.
Autorzy
Rok wydania
1991
Czasopismo
Journal of Molecular Structure
Numer woluminu
246
Strony
193-202
DOI
10.1016/0022-2860(91)80126-O
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
Infrared spectra of polycrystalline (CH3NH3)3Sb2Cl9 and (CH3NH3)3Bi2Cl9 have been studied in the temperature range 90–300 K. A systematic temperature dependence study of the internal modes has been carried out. We discuss the effects of the dynamic state of methylammonium (MA) cations on their vibrational spectra. The results show that the dynamics of MA cations in both compounds is similar in higher (about 300 K) and lower temperature (in the vicinity of 100 K) regions. Substantial differences are revealed in the intermediate temperature interval. The results are in good agreement with earlier dielectric, calorimetric and 1H NMR studies.
Adres publiczny
https://doi.org/10.1016/0022-2860(91)80126-O
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