Excited-state s-cis rotamers produced by extreme red edge excitation of all-trans-1,4-diphenyl-1,3-butadiene

Autor:	Robert A. Goldbeck, James W. Lewis, W. Atom Lee, Soeren Moeller, Stacie E. Wallace-Williams, David S. Kliger, Kerry M. Hanson
Rok vydání:	1993
Předmět:	Wavelength Absorption spectroscopy Chemistry Excited state General Engineering Emission spectrum Physical and Theoretical Chemistry Photochemistry Absorption (electromagnetic radiation) Conformational isomerism Fluorescence Excitation
Zdroj:	The Journal of Physical Chemistry. 97:9587-9592
ISSN:	1541-5740 0022-3654
DOI:	10.1021/j100140a010
Popis:	The shapes of the fluorescence emission and lowest excited singlet-state absorption spectra of all-trans-1,4- diphenylbutadiene (DPB) in hydrocarbon solvents vary with excitation wavelength when exciting on the extreme red edge of the ground-state absorption spectrum. This contrasts with the wavelength independence observed for the excited singlet-state absorption and fluorescence emission spectra of 1,5-diphenyl-2,3,4,6,7,8-hexahydronaphthalene and for the fluorescence emission spectra of 1,4-diphenyl-1,3-cyclopentadiene, s-trans and s-cis structural analogs of DPB, respectively. The spectral changes in DPB can be explained in terms of an excitation wavelength-dependent production of s-cis and s-trans rotamer populations in the excited state
Databáze:	OpenAIRE
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