Electronic Resource
College Park, Md.
:
American Institute of Physics (AIP)
The Journal of Chemical Physics
93 (1990), S. 5365-5369
ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
Transient spectral holes with lifetimes of several picoseconds are investigated in the infrared absorption band of the OH stretching vibration of the terpolymer polyvinyl butyral. A large variation of the quasihomogeneous linewidth from 7–45 cm−1 is determined from the measured holewidth in the temperature range 80–330 K and interpreted in terms of anharmonic coupling to a low frequency mode ν2. The result ν2=135±8 cm−1 provides strong evidence for indirect dephasing via the OH⋅⋅⋅O bridge stretching vibration. The inhomogeneous broadening of the total band is verified by the picosecond infrared holes. The inhomogeneity is related to an approximately static distribution of hydrogen bridges generated by local disorder and displays a different temperature behavior.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.459660
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