Isotropic Raman line broadening through vibrational depopulation. A comparative line shape study of the C-H and C-D stretching modes in deuterated species of methanol

Journal Article · Thu Jun 14 04:00:00 EDT 1990 · Journal of Physical Chemistry; (USA)

DOI:https://doi.org/10.1021/j100375a008· OSTI ID:6331089

Seifert, F; Oehme, K L ^[1]; Hoelzer, W ^[2]

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1. Friedrich-Schiller-Universitaet Jena (East Germany)
2. Paedagogische Hochschule Dr. Theodor Neubauer, Erfurt (East Germany)

The isotropic Raman line widths of C-H and C-D stretching modes in deuterated species of methanol have been measured throughout the whole range of the liquid state. The significant narrowing of the C-H Fermi doublet (peaked near 2,835 and 2,945 cm{sup {minus}1}) in CH{sub 3}OD compared to CH{sub 3}OH is discussed in terms of a fast intramolecular transfer of the vibrational energy to the overtone of the C-O-H bending mode. This process occurs within 1 ps, and no significant temperature dependence has been found. The corresponding C-D bands in CD{sub 3}OH and CD{sub 3}OD are insensitive to the OH/OD exchange. The line shapes of the isolated C-H oscillators in CHD{sub 2}OH and CHD{sub 2}OD are indistinguishable.

• OSTI ID: 6331089
• Journal Information: Journal of Physical Chemistry; (USA), Journal Name: Journal of Physical Chemistry; (USA) Vol. 94:12; ISSN 0022-3654; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALCOHOLS
DATA
DATA ANALYSIS
DEUTERIUM
ENERGY LEVELS
EXCITED STATES
EXPERIMENTAL DATA
HYDROGEN ISOTOPES
HYDROXY COMPOUNDS
INFORMATION
ISOTOPES
LIGHT NUCLEI
MEASURING INSTRUMENTS
MEASURING METHODS
METHANOL
NUCLEI
NUMERICAL DATA
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
STABLE ISOTOPES
VIBRATIONAL STATES