Determination of relaxation times of ground electronic state vibrational levels of mixed molecular crystals

Autor:	L. A. Ogurtsova, F. S. Pokrovskaya, Yu. V. Naboikin, A. P. Podgornyi
Rok vydání:	1978
Předmět:	Chemistry Relaxation (NMR) Doping Biophysics Analytical chemistry General Chemistry Condensed Matter Physics Photochemistry Biochemistry Atomic and Molecular Physics and Optics Spectral line Vibrational energy relaxation Molecule Stimulated emission Ground state Excitation
Zdroj:	Journal of Luminescence. 17:367-374
ISSN:	0022-2313
DOI:	10.1016/0022-2313(78)90046-7
Popis:	The stimulated emission spectra of mixed molecular crystals were investigated with the Nd glass lasser third harmonic excitation at 4.2 K. Napthalene crystals doped with β-naphthyl- n -biphenylyl ethylene and dibenzyl doped with naphthacene in various concentrations were studied. Relaxation times of the ground state vibrational levels in mixed molecules were obtained by use of the dependence of stimulated emission intensity upon excitation energy for naphthacene in dibenzyl τ 1 of the vibrational level at 317 cm -1 was ∼ 3 × 10 -9 s; for β-naphthyl- n -biphenylyl ethylene in naphthalene τ 1 of the 1629 cm -1 vibrational level was ∼ 10 -10 s.
Databáze:	OpenAIRE
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