HIGH RESOLUTION OPTICAL SPECTRA OF BENZOPHENONE UNDER HIGH PRESSURE
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Date
1988
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Ohio State University
Abstract
Laser excitation and phosphorescence spectra of benzophenone (BP) under high pressure are investigated at $2^{\circ}K$ using a diamond anvil cell. BP is doped in a $4,4^{\ast} dibromodiphenyl$ ether (DDE) single crystal. Early high pressure spectral works of BP were performed at room - or $LN_{2}$ - temperature (1). Our utilization of LHe. has produced highly resolved spectra, separating the intramolecular transitions with their phonon side-band. High pressure does not degrade the known BP/DDE low temperature spectra. We will report spectral investigation up to 40 kbar. Pressure dependence of the electronic $(T_{1})$ origin, C - O stretch and other vibrational frequencies and the DebyeWaller factor of BP/DDE will be presented. These results shed new light on our recent magnetic resonance work on BP under pressure (2). They also elucidate the modifications of electron.phonon coupling of BP/DDE under compression.
Description
$^{1}$ J.D. Simpson and H. W. Offen, J. Chem. Phys. 55, 1323 (1971) and earlier work cited therein. $^{2}$ C.J. Sandroff, I.Y. Chan and W.M. Chung. ibid. 84, 2424 (1987).
Author Institution: Department of Chemistry, Brandeis University
Author Institution: Department of Chemistry, Brandeis University