Photokinetics of two novel photochromic diarylethenes derived from benzothiophene was written by Vazquez, A.;Nudelman, N. Sbarbati. And the article was included in International Journal of Chemical Kinetics in 2012.SDS of cas: 90560-10-4 This article mentions the following:
Two new unsym. substituted photochromic diarylethenes, namely 3-[3, 3,4,4,5,5-hexafluoro-2-(2-methylbenzothien-3-yl)cyclopent-1-en-1-yl]-2-methyl-6-methoxy-1- benzothiophene and 3-[3,3,4,4,5,5-hexafluoro-2-(2-methylbenzothien-3-yl)cyclopent-1-en-1-yl]-2-methyl-6-methoxy-7-nitro-1-benzothiophene, were synthesized. Their optical properties and kinetics of cyclization and cycloreversion were determined in four solvents and compared with the sym. diarylethene (3,3,4,4,5,5-hexafluorocyclopent-1-en-1,2-diyl)bis(2-methyl-1-benzothiophene). While the UV spectra of the three compounds are almost insensitive to solvent changes, the rates of the ring-opening and ring-closure reactions exhibit interesting kinetic behavior that differs from other diarylethenes reported in the literature. The cycloreversion for the three compounds follows first-order kinetics, whereas the cyclization cannot be described by a simple kinetic law. Different approaches were tested, and a complex exponential equation could be derived that fits the exptl. data. The unusual presence of two ring-opened conformational isomers, one of them nonphotochromic, is proposed for the ring-opened compounds to explain the derived kinetic law and observed solvent effects. These results are of interest in relation to the application of the novel diarylethenes as potential optical materials. © 2012 Wiley Periodicals, Inc. Int J Chem Kinet 1-9, 2012. In the experiment, the researchers used many compounds, for example, 6-Methoxybenzo[b]thiophene (cas: 90560-10-4SDS of cas: 90560-10-4).
6-Methoxybenzo[b]thiophene (cas: 90560-10-4) belongs to benzothiophene derivatives. Benzothiophene finds use in research as a starting material for the synthesis of larger, usually bioactive structures. It is found within the chemical structures of pharmaceutical drugs such as zileuton, raloxifene, and sertaconazole, and also BTCP.SDS of cas: 90560-10-4
Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem