All-Red-Light Photoswitching of Indirubin Controlled by Supramolecular Interactions was written by Thumser, Stefan;Koettner, Laura;Hoffmann, Nadine;Mayer, Peter;Dube, Henry. And the article was included in Journal of the American Chemical Society in 2021.COA of Formula: C8H3F2NO2 This article mentions the following:
Red-light responsiveness of photoswitches is a highly desired property for many important application areas such as biol. or material sciences. The main approach to elicit this property uses strategic substitution of long-known photoswitch motives such as azobenzenes or diarylethenes. Only very few photoswitches possess inherent red-light absorption of their core chromophore structures. Here, author present a strategy to convert the long-known purple indirubin dye into a prolific red-light-responsive photoswitch. In a supramol. approach, its photochromism can be changed from a neg. to a pos. one, while at the same time, significantly higher yields of the metastable E-isomer are obtained upon irradiation E- to Z-photoisomerization can then also be induced by red light of longer wavelengths. Indirubin therefore represents a unique example of reversible photoswitching using entirely red light for both switching directions. In the experiment, the researchers used many compounds, for example, 5,6-Difluoroindoline-2,3-dione (cas: 774-47-0COA of Formula: C8H3F2NO2).
5,6-Difluoroindoline-2,3-dione (cas: 774-47-0) belongs to indole derivatives. Indole exists overwhelmingly in the 1H-indole form as do other simple indoles. Due to this activity, the indole ring system has become an important component or intermediate in the synthesis of heterocycles.COA of Formula: C8H3F2NO2
Referemce:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles