Photosensitive bent-core nematic liquid crystals with various linking units in the side arms: Structure-properties relationships was written by Smahel, Michal;Poryvai, Anna;Xiang, Ying;Pociecha, Damian;Troha, Tinkara;Novotna, Vladimira;Svoboda, Jiri;Kohout, Michal. And the article was included in Journal of Molecular Liquids in 2020.Reference of 95-88-5 The following contents are mentioned in the article:
We present two isomeric series of photosensitive bent-core liquid crystals possessing a lateral chlorine atom in the central resorcinol unit and various linking units in the side arms. With the aim to tune properties of the nematic phase, we have varied the type of the linking unit in the lengthening arm with rising rigidity from benzoate ester, biphenyl, cinnamate, Schiff base to stilbene moieties. In addition to that, we have changed the position of the lateral substituent (chlorine) as well. The mesomorphic properties of the materials have been determined from differential scanning calorimetry, polarizing optical microscopy, dielec. spectroscopy and X-ray studies. We show that synergy of the linking unit with the effect of the lateral substituent gives rise to broad temperature range of mesophases – the nematic phase as well as a SmCP phase. Thanks to the presence of the photosensitive group in the mol. structure, we have been able to transform both mesophases to the isotropic phase under UV light. The chem. structure-mesomorphic properties relationships are discussed with the aid of ab initio calculations and the results presented in context with exptl. data. This study involved multiple reactions and reactants, such as 4-Chlororesorcinol (cas: 95-88-5Reference of 95-88-5).
4-Chlororesorcinol (cas: 95-88-5) belongs to organic chlorides. Organochlorines stimulate the central nervous system and cause convulsions, tremor, nausea, and mental confusion. Examples are dichlorodiphenyltrichloroethane (DDT), chlordane, lindane, endosulfan, and dieldrin. Organochlorine compounds are lipophylic, meaning they are more soluble in fat than in water. This gives them a high tenancy to accumulate in the food chain (biomagnification).Reference of 95-88-5
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics