Dual luminescence, structure and excimers of 9-anthracene carboxylic acid

9-Anthracene carboxylic acid (9ACA) shows two fluorescence spectra which have been variously attributed to twisted and planar molecular forms or to excimers and excited tetramers. The study of the concentration dependence shows that both emissions are of molecular origin. In alkaline solution the fl...

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Bibliographic Details
Published inJournal of luminescence Vol. 55; no. 5; pp. 271 - 275
Main Authors Ghoneim, N., Scherrer, D., Suppan, P.
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 01.08.1993
Elsevier
Subjects
Atomic and molecular physics
Exact sciences and technology
Fluorescence and phosphorescence spectra
Fluorescence and phosphorescence; radiationless transitions, quenching (intersystem crossing, internal conversion)
Molecular properties and interactions with photons
Physics
Structure effect
Excimers
Organic solvents
Emission spectra
Condensed aromatics
Luminescence
Fluorescence
Carboxylic acids
Experimental study
Organic compounds
Solvent effects
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Summary:9-Anthracene carboxylic acid (9ACA) shows two fluorescence spectra which have been variously attributed to twisted and planar molecular forms or to excimers and excited tetramers. The study of the concentration dependence shows that both emissions are of molecular origin. In alkaline solution the fluorescence is similar to that of anthracene, and this is explained by the wide energy gap between the antibonding orbitals of the aromatic ring and of the carbonyl group linked to the very strong donor O -.
ISSN:0022-2313
1872-7883
DOI:10.1016/0022-2313(93)90022-F