期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 53, 期 2, 页码 591-594出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201307016
关键词
dyes; pigments; photochemistry; proton transfer; thioindigo; ultrafast spectroscopy
资金
- DFG through the SFB Dynamics and intermediates of molecular transformations [SFB 749, A5, C2]
- DFG through the Cluster of Excellence Munich Center for Advanced Photonics (MAP)
- International Max Planck Research School (IMPRS) in Chemical Biology
- Studienstiftung des deutschen Volkes
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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