38072-53-6Relevant articles and documents
Design, synthesis and investigation of water-soluble hemi-indigo photoswitches for bioapplications
Berdnikova, Daria V.
, p. 2822 - 2829 (2019)
A series of hemi-indigo derivatives was synthesized and their photoswitching properties in aqueous medium were studied. The dimethoxy hemi-indigo derivative with the best photochromic performance in water was identified as a promising platform for the dev
Hemiindigo: Highly Bistable Photoswitching at the Biooptical Window
Petermayer, Christian,Thumser, Stefan,Kink, Florian,Mayer, Peter,Dube, Henry
supporting information, p. 15060 - 15067 (2017/11/03)
Hemiindigo is a long known chromophore that absorbs in the blue part of the spectrum but has almost completely been ignored as potential photoswitch. Herein we show how the absorption of hemiindigo is shifted to the red part of the visible spectrum and how nearly perfect photoswitching can be achieved using blue or green and red light. Five derivatives were investigated giving very high isomeric yields in both switching directions, i.e. >90% E isomer after irradiation with 470 to 530 nm light and 99% Z isomer with 590 up to 680 nm light. At the same time the thermal bistability is extraordinarily high leading to half-lives of the pure isomeric states of up to 83 years at 25 °C. The herein developed photoswitches show photochromism in the visible enabling the two isomeric states to be distinguished by the naked eye. Substituted hemiindigos therefore constitute extremely promising new photoswitches with excellent properties for applications in biology, chemistry, or material sciences.
Color and Constitution. Part 8 . Some Novel Dyestuffs Containing Indoxyl Residues
Katritzky, Alan R.,Li, Qiao-Ling,Fan, Wei-Qiang
, p. 1287 - 1292 (2007/10/02)
Novel dyes containing C-linked indoxyl residues are prepared by two routes: (a) by the reaction of C-electrophiles with N-acetylindoxyl and (b) by the reaction of active methylene compounds with 2-chloroindole-3-one.The visible absorption spectra are recorded and discussed.
