Issue 61, 2018, Issue in Progress
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RSC Advances

Mesophase behavior of new linear supramolecular hydrogen-bonding complexes†

H. A. Ahmed, ORCID logo *ab   M. Hagarac  and  A. Aljuhanid  

* Corresponding authors

a College of Sciences, Chemistry Department, Taibah University, Yanbu, Saudi Arabia
E-mail: hmahmoud@taibahu.edu.sa, ahoda@sci.cu.edu.eg, mohamedhaggar@gmail.com

b Faculty of Science, Department of Chemistry, Cairo University, Cairo, Egypt

c Faculty of Science, Chemistry Department, Alexandria University, Alexandria, Egypt

d Faculty of Sciences, Chemistry Department, Taibah University, Al-Madinah al-Munawwarah, Saudi Arabia
E-mail: ateyatallah@hotmail.com

Abstract

Thermal and mesophase behavior of four new series of hydrogen-bonded supramolecular complexes (In/IIm) were investigated by differential scanning calorimetry and phases identified by polarized light microscopy. All hydrogen-bonded complexes formed from 4-alkoxyphenylazobenzoic acid (In) and 4-(4′-pyridylazophenyl)-4′′-alkoxybenzoates (IIm). The results revealed that the prepared complexes are dimorphic, possessing smectic C and nematic phases. The comparison, made between the present series and previously investigated simpler, In/IIIm and angular, In/IVm analogues, revealed that increasing the length of the mesogenic core and/or linearity of complex increase the stabilities of both the smectic C and nematic phases.

Graphical abstract: Mesophase behavior of new linear supramolecular hydrogen-bonding complexes

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Article information

DOI
https://doi.org/10.1039/C8RA07692H
Article type
Paper
Submitted
15 Sep 2018
Accepted
04 Oct 2018
First published
11 Oct 2018
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2018,8, 34937-34946

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Mesophase behavior of new linear supramolecular hydrogen-bonding complexes

H. A. Ahmed, M. Hagar and A. Aljuhani, RSC Adv., 2018, 8, 34937 DOI: 10.1039/C8RA07692H

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