title: Synthesis and thermotropic studies of two novel series of kinked liquid crystals: 2-(4'-alkoxybiphen-4-yl)-6-methylquinolines and 2-(6-alkoxynaphthalen-2-yl)-6-methylquinolines.
abstract: Two novel homologous series of kinked (Z-shaped) liquid crystalline compounds were synthesized using a short two-step reaction. Yields of 30%-40% and 51%-57% were obtained for 2-(4'-alkoxybiphen-4-yl)-6-methylquinolines (nO-PPQMe, n = 3-8) and 2-(6-alkoxynaphthalen-2-yl)-6-methylquinolines (iO-NpQMe, i = 3-7), respectively. Spectral analyses agreed with the expected structures. The thermotropic behaviors of these compounds were investigated using polarized optical microscopy and differential scanning calorimetry. An enantiotropic nematic phase appeared to be the main mesophase in these two series of kinked liquid crystalline compounds, and an additional enantiotropic smectic C phase appeared when n = 8.
authors.affiliation: Department of Chemistry, Fu Jen Catholic University, New Taipei City 24205, Taiwan. 027087@mail.fju.edu.tw.
authors.forename: Win-Long
authors.initials: WL
authors.lastname: Chia
authors.affiliation: Department of Chemistry, Fu Jen Catholic University, New Taipei City 24205, Taiwan. sltjc0@gmail.com.
authors.forename: Ker-Non
authors.initials: KN
authors.lastname: Kuo
authors.affiliation: Department of Chemistry, Fu Jen Catholic University, New Taipei City 24205, Taiwan. brian730407@hotmail.com.
authors.forename: Shao-Hsun
authors.initials: SH
authors.lastname: Lin
mesh_terms: D002152:Calorimetry, Differential Scanning; D050866:Liquid Crystals / Q000737:chemistry* / Q000648:ultrastructure; D008859:Microscopy, Polarization; D009281:Naphthalenes / Q000138:chemical synthesis / Q000737:chemistry; D044367:Phase Transition; D011804:Quinolines / Q000138:chemical synthesis / Q000737:chemistry*
chemical_list: D009281:Naphthalenes; D011804:Quinolines; C081445:6-methylquinoline