V-shaped Schiff’s base liquid crystals based on resorcinol: synthesis and characterisation

Quan, Yuan-Yuan; Wang, Duo; He, Qingqing; Hu, Ji-Wen; Tian, Ming; Wang, Xinjiao; Jia, Ying‐Gang; Yao, Dan-Shu

doi:10.1080/02678292.2019.1679899

Cited by 14 publications

(1 citation statement)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To understand the relationship between liquid crystals' (LCs) chemical structures and mesomorphic properties, there has been extensive research on various homologous series of azomethine/esters [1][2][3][4][5]. Organic compounds' mesophase stability and temperature range are predominantly results of their molecular shape, i.e., slight changes in the molecular geometry lead to major shifts in the mesomorphic behavior.…”

Section: Introductionmentioning

confidence: 99%

Wide Nematogenic Azomethine/Ester Liquid Crystals Based on New Biphenyl Derivatives: Mesomorphic and Computational Studies

et al. 2022

View full text Add to dashboard Cite

The thermal stability and mesomorphic behavior of a new biphenyl azomethine liquid crystal homologues series, (E)-4-(([1,1’-biphenyl]-4-ylmethylene)amino)phenyl 4-(alkoxy)benzoate, In, were investigated. The chemical structures of the synthesized compounds were characterized using FT-IR, NMR, and elemental analyses. Differential scanning calorimetry (DSC) and polarized optical microscopy were employed to evaluate the mesomorphic characteristics of the designed homologues. The examined homologues possessed high thermal stability and broad nematogenic temperature ranges. Furthermore, the homologues were covered by enantiotropic nematic phases. The experimental measurements of the mesomorphic behavior were substantiated by computational studies using the density functional theory (DFT) approach. The reactivity parameters, dipole moments, and polarizability of the studied molecules are discussed. The theoretical calculations demonstrated that as the chain length increased, the polarizability of the studied series increased; while it did not significantly affect the HOMO–LUMO energy gap and other reactivity descriptors, the biphenyl moiety had an essential impact on the stability of the possible geometries and their thermal as well as physical parameters.

show abstract