Photostability of 4,4'-dihydroxythioindigo, a mimetic of indigo.
Angew Chem Int Ed Engl
; 53(2): 591-4, 2014 Jan 07.
Article
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| MEDLINE
| ID: mdl-24282071
ABSTRACT
The photochemical properties of indigo, a widely used industrial dye, has attracted both experimentalists and theoreticians from the beginning. Especially the high photostability of indigo has been the subject of intensive research. Recently, it was proposed that after photoexcitation an intramolecular proton transfer followed by a nonradiative relaxation to the ground state promote photostability. In indigo the hydrogen bond and the proton transfer occur between the opposing hemiindigo parts. Here, we provide experimental and theoretical evidence that a hydrogen transfer within one hemiindigo or hemithioindigo part is sufficient to attain photostability. This concept can serve as an interesting strategy towards new photostable dyes for the visible part of the spectrum.
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1
Banco de datos:
MEDLINE
Asunto principal:
Protones
/
Carmin de Índigo
Idioma:
En
Revista:
Angew Chem Int Ed Engl
Año:
2014
Tipo del documento:
Article