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5‐Dimethylamino‐5′‐nitro‐2, 2′‐bithiophene—a New Dye with Pronounced Positive Solvatochromism
Author(s) -
Effenberger Franz,
Würthner Frank
Publication year - 1993
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199307191
Subject(s) - solvatochromism , nitro , chemistry , absorption (acoustics) , photochemistry , absorption spectroscopy , materials science , organic chemistry , solvent , optics , physics , alkyl , composite material
The exceptionally large positive solvatochromism of the title compound 1 spans almost the whole visible spectrum. The absorption maxima of 1 give an excellent correlation with the π * values of Kamlet and Taft, which makes it an ideal reference compound for a π * scale that is based on only one indicator dye.