Fermi resonance in Raman and infrared spectra of Ni(CH3COO)2·4H2O and its deuterated analogue

Autor:	H. D. Bist, G. S. Raghuvanshi, Mahendra Pal
Rok vydání:	1983
Předmět:	Chemistry Analytical chemistry Infrared spectroscopy Spectral line symbols.namesake Deuterium Libration symbols General Materials Science Hypsochromic shift Fermi resonance Hydrate Raman spectroscopy Spectroscopy
Zdroj:	Journal of Raman Spectroscopy. 14:1-5
ISSN:	0377-0486
DOI:	10.1002/jrs.1250140102
Popis:	The doublet at 962–906 cm−1 observed in the room temperature spectra of Ni(CH3COO)2. 4H2O is attributed to the ν4 state of the acetate group undergoing strong Fermi-type anharmonic interaction with a two-phonon hybrid state associated with a water libration exhibiting characteristic hypsochromic shift and hyperchromic effect with decreasing temperature. In the deuterated analogue another doublet at 706–666 cm−1 is associated with the v5 state of the acetate group and another two-phonon hybrid state, also associated with a D2O libration, exhibiting hypsochromic shift but the hypochromic effect. The Fermi interaction enhances in the hydrate and diminishes in the deuterate as the temperature is lowered.
Databáze:	OpenAIRE
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