Saari, Nur Asmak Nabila and Mislan, Azwa Amanina and Hashim, Rauzah and Zahid, Noor Idayu Mat (2018) Self-Assembly, Thermotropic, and Lyotropic Phase Behavior of Guerbet Branched-Chain Maltosides. Langmuir, 34 (30). pp. 8962-8974. ISSN 0743-7463, DOI https://doi.org/10.1021/acs.langmuir.8b01899.
Full text not available from this repository.Abstract
Five synthetic β-d-maltosides derived from Guerbet branched alcohols, whose total hydrocarbon chain length ranged from C8 to C24, were synthesized to a high anomeric purity, and their thermal properties, liquid-crystalline phases, and structures were characterized using differential scanning calorimetry, optical polarizing microscopy, and small-angle X-ray scattering. Thermal investigations of all anhydrous Guerbet maltosides showed that they do not form solid crystals but undergo a glass transition upon temperature change in the range of 35-53 °C. The glassy crystalline structure turns into the liquid-crystalline structure upon heating or addition of water. In thermotropic studies, the lamellar phase formation is prominent in shorter-chain-length analogues, whereas the longer-chain compounds exhibit a more frustrated form of self-assembly in the formation of a metastable state, polymorphism, and inverse bicontinuous cubic structure (Ia3d). The excess water conditions show that the phase formation is dominated by the lamellar phase for the longer-chain compounds. Normal micellar solution was observed in the shortest-chain-length maltosides because of the enlargement of hydrated maltose headgroups. The self-assembly of both dry and fully hydrated Guerbet maltosides, which exhibited glass-forming abilities and showed surface activity and also the ability to act as membrane-stabilizing compounds, makes them ideal candidates for practical use in industry as well as biomedical research.
| Item Type: | Article |
|---|---|
| Funders: | University of Malaya PPP PG030-2016A, Ministry of Higher Education Malaysia FRGS FP040-2015A and UM.C/625/1/HIR/MOHE/05 |
| Uncontrolled Keywords: | Bicontinuous cubic structure; Biomedical research; Crystalline structure; Glass forming ability; Liquid-crystalline phasis; Lyotropic phase behavior; Optical polarising microscopy; Temperature changes |
| Subjects: | Q Science > Q Science (General) Q Science > QD Chemistry |
| Divisions: | Faculty of Science > Department of Chemistry |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 09 Apr 2019 04:04 |
| Last Modified: | 09 Apr 2019 04:04 |
| URI: | http://eprints.um.edu.my/id/eprint/20848 |
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