Nematic-Isotropic Transition Temperature and Dipole-Dipole Interaction. 4-(4-X-Substituted Phenyliminomethyl)phenyl 4-Y-Substituted Benzoates and 4-X-Substituted Phenyl 4-(4-Y-Substituted Phenyliminomethyl) benzoates

Matsunaga, Yoshio; Hikosaka, L.; Hosono, K.; Ikeda, N.; Sakatani, T.; Sekiba, K.; Takachi, Kiyohiro; Takahashi, T.; Uemura, Yukikazu

doi:10.1080/10587250108030013

Cited by 7 publications

(1 citation statement)

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“…Since then, Schiff bases based on esters have attracted much attention on liquid crystal researches. Over the past few decades, a lot of low molar mass Schiff base esters have been synthesized and investigated extensively for liquid crystalline applications [18][19][20][21][22][23]. Centore and Garzillo [24] reported a structural and theoretical analysis of biphenylene azines containing a methyl group on the azine system and strong electron donor-acceptor groups on the phenylene rings.…”

Section: Introductionmentioning

confidence: 99%

Liquid Crystalline Properties of Unsymmetrical N-(o-hydroxybenzylidene)-N′-(4-n-alkoxybenzoyloxybenzylidene)azines: Synthesis and Characterization

Singh

Pandey

2010

Molecular Crystals and Liquid Crystals

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A new series of mesogenic unsymmetrical azines, N-(o-hydroxybenzylidene)-N 0 -(4-n-alkoxybenzoyloxybenzylidene)azines, HOC 6 H 4 CH=N-N=CHC 6 H 4 OCOC 6 H 4 O C m H 2m þ 1 (m ¼ 7, 8, 9, 10, 11, 12, 14, and 16) have been prepared. They have been characterized by elemental analyses, FT-IR, UV-visible, 1 H, and 13 C NMR (Nuclear Magnetic Resonance) spectra. The mesomorphic properties of these compounds were investigated by differential scanning calorimetry (DSC) and polarized optical microscopy (POM). The azines m ¼ 7, 10, and 14 exhibit features of enantiotropic nematic (N) mesophase whereas azines m ¼ 8, 11 exhibit features of a monotropic nematic phase. The azines m ¼ 9, 12, and 16 do not exhibit mesogenic nature.

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