Tuning the Optical Properties of Aryl-Substituted Dispirofluorene-Indenofluorene Isomers through Intramolecular Excimer Formation
Organic Letters2009Vol. 11(21), pp. 4794–4797
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Damien Thirion, Cyril Poriel, Frédéric Barrière, Rémi Métivier, Olivier Jeannin, Joëlle Rault‐Berthelot
Abstract
Two families of positional isomers of dispirofluorene-indenofluorene substituted by phenyl groups at the 2,7-positions of the fluorene moieties present drastically different optical properties. The emission wavelengths may be gradually and conveniently modulated for one of the two isomers by the phenyl group's substituent whose bulkiness controls the extent of the excimeric interaction evidenced in this paper.
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