Lee, Weng Nam and Salleh, Noordini Mohamad and Velayutham, Thamil Selvi and Cheng, Sit Foon (2023) Synthesis, phase transition behaviour and dielectric properties of smectogenic palm-based liquid crystals containing schiff base ester and phenyl ring. Journal of Molecular Structure, 1282. ISSN 0022-2860, DOI https://doi.org/10.1016/j.molstruc.2023.135168.
Full text not available from this repository.Abstract
Smectogenic liquid crystals (LCs) play an important role in various technological applications due to their interesting morphologies and defects. With incessant effort to add value to palm oil, another two series of palm-based liquid crystals (PBLCs), namely PB1a-PB3a and PB1b-PB3b, utilizing palm fatty acids as flexi-ble alkyl chain have been synthesized. The appearance of smectic A phase for all PBLCs was authenticated by Polarizing Optical Microscopy (POM) and further verified by Differential Scanning Calorimetry (DSC) and Small Angle X-ray Scattering (SAXS). Results revealed that the mesophase range of all synthesized LCs is highly dependent on flexible alkyl chain length, the presence of polar terminal substituent as well as the breath to width ratio of mesogenic core. Dielectric measurements show that the dielectric strength is also affected by the length of the flexible alkyl chain. It is worth noting that, as far as mesophase range is concerned, PBLCs were found to be far superior over other structurally related compounds that can be found in the literature.(c) 2023 Elsevier B.V. All rights reserved.
| Item Type: | Article |
|---|---|
| Funders: | Universiti Malaya Research University Grant -Faculty Program [GPF054B-2018] |
| Uncontrolled Keywords: | Flexible alkyl chain; Palm fatty acids; Schiff base; Smectic; Green chemistry; Dielectric constant |
| Subjects: | Q Science > QC Physics Q Science > QD Chemistry |
| Divisions: | Faculty of Science > Department of Chemistry Faculty of Science > Department of Physics |
| Depositing User: | Ms Zaharah Ramly |
| Date Deposited: | 17 May 2024 00:15 |
| Last Modified: | 17 May 2024 00:15 |
| URI: | http://eprints.um.edu.my/id/eprint/38578 |
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