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Near‐Infrared Dyes and Fluorophores Based on Diketopyrrolopyrroles
Author(s) -
Fischer Georg M.,
Ehlers Andreas P.,
Zumbusch Andreas,
Daltrozzo Ewald
Publication year - 2007
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.200604763
Subject(s) - infrared , chemistry , environmental science , optics , physics
NIRly there : The chromophore of compounds with intramolecular H bonds have been rigidified by substitution of the protons of the NH⋅⋅⋅N bridges by BR 2 groups (R=F, Ph). This stiffening and the polymethine character of the chromophores affords dyes with intense fluorescence at room temperature and high NIR absorption, but virtually no absorption in the visible range (see the picture for an example, —: absorption, ••••: fluorescence).