Optical and Geometrical Characterizations of Non-Linear Supramolecular Liquid Crystal Complexes

Author:

Ahmed Hoda A.ORCID,Hagar MohamedORCID,Alhaddad Omaima A.,Zaki Ayman A.

Abstract

Nonlinear architecture liquid crystalline materials of supramolecular 1:1 H-bonded complexes (I/II and I/III) were prepared through a self-assembly intermolecular interaction between azopyridine (I) and 4-n-alkoxybenzoic acid (II) as well as 4-n-alkoxyphenylazo benzoic acid (III). The H-bond formation of the prepared supramolecular hydrogen bonded (SMHB) complexes was confirmed by Fourier-transform infrared spectroscopy (FT-IR) and differential scanning calorimetry (DSC). Optical and mesomorphic behaviors of the prepared complexes were studied by polarized optical microscopy (POM) as well as DSC. Theoretical calculations were performed by the density functional theory (DFT) and used to predict the molecular geometries of the synthesized complexes, and the results were used to explain the experimental mesomorphic and optical properties in terms of their estimated thermal parameters. Ordinary and extraordinary refractive indices as well as birefringence at different temperatures were investigated for each sample using an Abbe refractometer and modified spectrophotometer techniques. Microscopic and macroscopic order parameters were calculated for individual compounds and their supramolecular complexes.

Publisher

MDPI AG

Subject

Inorganic Chemistry,Condensed Matter Physics,General Materials Science,General Chemical Engineering

Reference87 articles.

1. The Physics of Liquid Crystals;De Gennes,1993

2. Liquid Crystals;Chandrasekhar,1994

3. Introduction to Liquid Crystals;Priestly,2012

4. Dielectric, optical and orientational properties of liquid crystalline 4-alkyloxy-4′-cyanoazoxybenzenes and 4-alkyloxy-4′-cyanoazobenzenes

5. Physical Properties of Liquid Crystals;Gray,2009

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