Thieme Chemistry Journal Awardees – Where are They Now?The Influence of Electron-Withdrawing Groups at the 2- and 2′-Positions of Dibenzothienylethenes on Molecular Switching was written by Hofsaess, Robert;Rombach, David;Wagenknecht, Hans-Achim. And the article was included in Synlett in 2017.Formula: C9H8S This article mentions the following:
Three dibenzothienylethenes that carry a Me, a trifluoromethyl, or a fluoro substituent in the 2- and 2′-position were synthesized in short multistep syntheses, resp. The trifluoromethyl and fluoromethyl substituents significantly improve the absorption properties of the corresponding open and closed isomers (both in the UV-A and in the visible range). The increasing electron deficiency (i) enlarges the portion of the closed and colored diarylethene isomer in the corresponding photostationary states and slows down the closing and opening isomerisation, (ii) the switching reactions, both closing and opening, are slowed down, and (iii) the switching quantum yields are lowered. In the experiment, the researchers used many compounds, for example, 2-Methylbenzo[b]thiophene (cas: 1195-14-8Formula: C9H8S).
2-Methylbenzo[b]thiophene (cas: 1195-14-8) belongs to benzothiophene derivatives. Benzothiophene scaffolds are of great importance due to its increased presence in bioactive molecules. The different substitution patterns in these heterocycles offer new opportunities for drug discovery and other applications in materials science.Formula: C9H8S
Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem