ISSN:
1434-4475
Keywords:
Colour and constitution
;
Chromophore
;
Oxo croconic acid bisamide
;
Pseudooxo croconic acid bisamide
;
Electronic wavefunctions and transitions
;
PPP
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract The colour of oxo- und pseudooxo croconic acid bisamides (1) in solution is due to two intense π → π* transitions in the visible region. These transitions are related to those of the Klessinger-Lüttke basic indigo chromophore. The first band corresponds to the second absorption band of this basic chromophore red-shifted by the intramolecular charge transfer excitation between the molecular subsystems of1. The second band of1 is closely related to the colour band of the basic indigo chromophore. According to the results of various analysis and projection techniques the interpretation of the colour of1 in terms of the basic indigo chromophore is superior to any other one in terms of alternative chromophoric subsystems.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00798787
Permalink
