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 00:00:00 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]

---

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), Vol. 94:12; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

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