ANOMALOUS PRESSURE EFFECTS ON THE RAMAN-SPECTRA IN HYDROGEN-BONDED MOLECULAR CHAIN SYSTEMS

Authors
MORITOMO Y TOKURA Y MOCHIDA T SUGAWARA T OOHASHI T KOJIMA T ISTUBO A
Citation
Y. Moritomo et al., ANOMALOUS PRESSURE EFFECTS ON THE RAMAN-SPECTRA IN HYDROGEN-BONDED MOLECULAR CHAIN SYSTEMS, The Journal of chemical physics, 101(3), 1994, pp. 1813-1819
Citations number
21
Categorie Soggetti
Physics, Atomic, Molecular & Chemical
Journal title
The Journal of chemical physics → ACNP
ISSN journal
00219606
Volume
101
Issue
3
Year of publication
1994
Pages
1813 - 1819
Database
ISI
SICI code
0021-9606(1994)101:3<1813:APEOTR>2.0.ZU;2-P
Abstract
Effects of hydrostatic pressure on the Raman spectra have been investi gated for four kinds of 13-diketone crystals with hydrogen-bonded mole cular chains. In all the crystals we studied, intense CO stretching Ra man mode shows pressure-induced softening reflecting compression of th e hydrogen bonds. Furthermore, application of pressure broadens the bo th C=O and C-O stretching modes and intensifies several specific vibra tional bands. We ascribed these spectral changes to formation or growt h of the kink-type defects of the hydrogen-bonded sequence.