Mesophase behavior of new linear supramolecular hydrogen-bonding complexes?
RSC Advances Pub Date: 2018-10-11 DOI: 10.1039/C8RA07692H
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.
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Journal Name：RSC Advances
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CAS no.: 89640-58-4
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