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Solvent Effect on Color, Band Shape, and Charge‐Density Distribution for Merocyanine Dyes Close to the Cyanine Limit
Author(s) -
Würthner Frank,
Archetti Graziano,
Schmidt Ralf,
Kuball HansGeorg
Publication year - 2008
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200800279
Subject(s) - solvatochromism , merocyanine , cyanine , chemistry , dipole , solvent , photochemistry , spectroscopy , absorption (acoustics) , analytical chemistry (journal) , chemical physics , organic chemistry , optics , photochromism , physics , fluorescence , quantum mechanics
Solvatochromism elucidated : UV/Vis and electrooptical absorption spectroscopy were used to elucidate the effect of solvent on the electrical and optical properties of three merocyanine dyes. Changes in the shape of the Vis absorption band in solvents of different polarity [e.g., the depicted dye in Et 2 O (black), AcOEt (blue), and MeCN (orange)] are explained by different excited‐state dipole moments of the respective vibronic transitions.