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3,6‐Diazaxanthylium Salts: Dyes with a New Chromophore
Author(s) -
Eggers Lutz,
Grahn Walter,
Lüttke Wolfgang,
Knieriem Burkhard,
Jones Peter G.,
Chrapkowski Axel
Publication year - 1994
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.199408631
Subject(s) - chromophore , substituent , bent molecular geometry , fluorescence , wavelength , chemistry , photochemistry , crystal (programming language) , crystal violet , materials science , stereochemistry , optics , optoelectronics , organic chemistry , physics , computer science , medicine , pathology , programming language
A new tricyclic framework is the characteristic feature of the violet, air‐sensitive dyes 1 . The phenyl substituent X (X = Ph, 4‐CF 3 ‐C 6 H 4 ) is arranged orthogonally to the chromophore both in the crystal and in solution, and the tricycle is bent by about 5° about the axis C9–O10. In comparison to the frequently used rhodamines, compounds 1 absorb at longer wavelengths and fluoresce with lower quantum yields.