Complete spectral and computational characterization of ??2,2???-Bi(2H-1,4-benzothiazine) (BBTZ) demonstrated that the structures of the stable yellow form and the photogenerated red form were assigned incorrectly and should be revised to the cis (Z) and trans (E) isomers, respectively. A blue elusive dication generated upon further protonation of the violet cationic form was also identified by UV spectroscopy and DFT calculations. On the basis of these data, BBTZ can be appreciated as a robust four-state system for various applications
The Delta2,2'-Bi(2H-1,4-benzothiazine) Structural Motif of Red Hair Pigments Revisited: Photochromism and Acidichromism in a Unique Four-State System
O. Crescenzi;V. Barone;M. d'Ischia
2012
Abstract
Complete spectral and computational characterization of ??2,2???-Bi(2H-1,4-benzothiazine) (BBTZ) demonstrated that the structures of the stable yellow form and the photogenerated red form were assigned incorrectly and should be revised to the cis (Z) and trans (E) isomers, respectively. A blue elusive dication generated upon further protonation of the violet cationic form was also identified by UV spectroscopy and DFT calculations. On the basis of these data, BBTZ can be appreciated as a robust four-state system for various applicationsFile in questo prodotto:
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