Cui, Shuzhen published the artcileSynthesis and characterisation of photochromic dithienylcyclopentene liquid crystal with thermal irreversibility, Recommanded Product: 5-Chloro-3-[2-(5-chloro-2-methylthien-3-yl)cyclopent-1-en-1-yl]-2-methylthiophene, the publication is Liquid Crystals (2016), 43(6), 803-810, database is CAplus.
A series of photochromic liquid crystal dithienylcyclopentene derivatives I (n = 4, 5, 6, 7) was synthesized from the initial material 2-chloro-5-methylthiophene. They were characterized by 1H NMR, high resolution mass spectrometer, differential scanning calorimetry (DSC) and polarized optical microscopy (POM) with a hot stage. All of them exhibited excellent photochem. reversible isomerization between the open-ring form and the closed-ring form in both organic solvents and LC media, resulting in the color change between colorless and purple under different light irradiations. The typical textures from POM showed that their isomers both had nematic phase and smectic phase with different colors. These compounds with bent shape were more sensitive to light than those of diarylethenes reported.
Liquid Crystals published new progress about 219537-97-0. 219537-97-0 belongs to chlorides-buliding-blocks, auxiliary class Fused/Partially Saturated Cycles,Cyclopentenes, name is 5-Chloro-3-[2-(5-chloro-2-methylthien-3-yl)cyclopent-1-en-1-yl]-2-methylthiophene, and the molecular formula is C15H14Cl2S2, Recommanded Product: 5-Chloro-3-[2-(5-chloro-2-methylthien-3-yl)cyclopent-1-en-1-yl]-2-methylthiophene.
Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics