Synthesis and properties of an unsymmetrical diarylethene bearing a chlorine atom was written by Wang, Liqin;Pu, Shouzhi;Yan, Liushui;Liu, Weijun. And the article was included in Key Engineering Materials in 2011.COA of Formula: C9H7BrS This article mentions the following:
A new unsym. photochromic diarylethene 1-(2-methyl-benzothiophenyl)-2-(2-methyl-5-(4-chlorophenyl))perfluoroncyclopentene (1a), was synthesized and its optoelectronic properties, such as photochromism in solution as well as in poly(Me methacrylate) (PMMA) amorphous films and fluorescence were investigated. The photochromic reaction kinetics indicated that the cyclization process of 1a belongs to the zeroth order reaction and the cycloreversion process belongs to the first order reaction. Using diarylethene 1/PMMA film as recording medium and a linearly polarized 633 nm laser diode for recording and readout, polarization multiplexed image recording can be carried out in this film, which illustrated that the diarylethene can be potentially used as holog. optical recording medium. In the experiment, the researchers used many compounds, for example, 3-Bromo-2-methylbenzo[b]thiophene (cas: 10243-15-9COA of Formula: C9H7BrS).
3-Bromo-2-methylbenzo[b]thiophene (cas: 10243-15-9) belongs to benzothiophene derivatives. Benzothiophene is relatively a stable molecule. The electrophilic substitution of benzothiophene systems is much less regioselective than that of indoles. It has been used as a raw material for the synthesis of biologically active structures and is found in pharmaceuticals such as leukotriene synthesis inhibitors and antifungals, as well as in many natural products.COA of Formula: C9H7BrS
Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem