Magnetic-field effects on the recombination fluorescence of anthracene cation and perfluorocarbon anions

Autor:	V. M. Grigoryants, S. D. McGrane, S. Lipsky
Rok vydání:	1998
Předmět:	Anthracene chemistry.chemical_compound Photoluminescence Diffusion equation Distribution function chemistry Field (physics) General Physics and Astronomy Physical and Theoretical Chemistry Atomic physics Fluorescence Hyperfine structure Ion
Zdroj:	The Journal of Chemical Physics. 109:7354-7361
ISSN:	1089-7690 0021-9606
DOI:	10.1063/1.477341
Popis:	The recombination fluorescence from anthracene that has been photoionized at 188 nm in isooctane solutions containing low concentrations of either perfluorocyclobutane (C4F8) or perfluorobenzene (C6F6) has been examined as a function of magnetic-field strength. Level crossing resonances are found at magnetic-field positions predicted by the theory of a hyperfine driven spin evolution on the perfluoroanion (i.e., 0, 452, 757, and 903 G for C4F8 and at 0, 411, and 822 G for C6F6). The widths of the zero-field resonances have been studied as a function of perfluorocarbon concentration. For perfluorocyclobutane, the peak to peak widths of the derivative spectra vary from 6.8 to 13 G over a concentration range from 0.005 to 0.21 M. This variation is quantitatively predicted using the analytic solution to the time-dependent diffusion equation in a Coulomb field to determine how the distribution function for thermalized electron–cation distances evolves into its concentration dependent counterpart for anion–cati...
Databáze:	OpenAIRE
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