Anisotropic reorientation of perylene and 3,9-dibromoperylene in glycerol: fluorescence anisotropy decay and quantum-mechanical study

Autor:	Krzysztof Wiśniewski, Jacek Szubiakowski, Małgorzata Wierzbowska, Andrzej Kowalczyk, Wieslaw Nowak, Aleksander Balter
Rok vydání:	1996
Předmět:	Chemistry General Physics and Astronomy Rotational diffusion Photochemistry Molecular physics Fluorescence chemistry.chemical_compound Excited state Physics::Atomic and Molecular Clusters Initial value problem Physical and Theoretical Chemistry Anisotropy Quantum Fluorescence anisotropy Perylene
Zdroj:	Chemical Physics. 208:283-296
ISSN:	0301-0104
Popis:	The authors compare results of fluorescence anisotropy decay measurements for perylene and 3,9-dibromoperylene (3,9-DBP) in glycerol. The observed time-dependent fluorescence depolarization is interpreted in terms of the hydrodynamic model of molecular reorientation. A highly anisotropic reorientation of perylene is confirmed. Possible reasons of the deficit of the initial value of the fluorescence emission anisotropy (EA) of perylene in glycerol are discussed. The most plausible explanation appears to be the non-planarity of perylene in either the ground or the first excited state. Results of quantum-mechanical calculations support this view. The experimental data suggest that the symmetric rotor model usually applied to the case of perylene is oversimplified. The first observation of the anisotropy of rotational diffusion for 3,9-DBP is presented.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::dc559ac7c85675d72e1eba62780e7ab1 https://doi.org/10.1016/0301-0104(96)00104-8 Zobrazit plný text záznamu Full Text from ScienceDirect