Effects of lipid packing and intermolecular hydrogen bond on thermotropic phase transition of stearyl glucoside
The sugar anomeric effect on the thermotropic phase transition of stearyl glucoside was investigated. Standard analysis to study the phase transition through differential scanning calorimetry (DSC), and optical polarizing microscopy (OPM) was applied. In addition, small- and wide-angle X-ray scatter...
Saved in:
Main Authors: | , , , , |
---|---|
Format: | Article |
Published: |
Elsevier
2019
|
Subjects: | |
Online Access: | http://eprints.um.edu.my/24094/ https://doi.org/10.1016/j.molliq.2019.02.075 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Institution: | Universiti Malaya |
id |
my.um.eprints.24094 |
---|---|
record_format |
eprints |
spelling |
my.um.eprints.240942020-03-22T12:00:25Z http://eprints.um.edu.my/24094/ Effects of lipid packing and intermolecular hydrogen bond on thermotropic phase transition of stearyl glucoside Ishak, Khairul Anwar Zahid, Noor Idayu Mat Velayutham, Thamil Selvi Annuar, Mohamad Suffian Mohamad Hashim, Rauzah Q Science (General) QC Physics QD Chemistry QH Natural history The sugar anomeric effect on the thermotropic phase transition of stearyl glucoside was investigated. Standard analysis to study the phase transition through differential scanning calorimetry (DSC), and optical polarizing microscopy (OPM) was applied. In addition, small- and wide-angle X-ray scattering (SWAXS) and impedance spectroscopy (IS) were used to elucidate the phase structural information and the dielectric response of the glycolipid self-assembly system, respectively. A distinctive solid-to-liquid crystal phase transition of α- and β-stearyl glucoside was observed. At ambient temperature we observed semi-crystalline structure for the former and gel phase for the latter. α-Stearyl glucoside showed only one-step transition from semi-crystal to lamellar liquid crystal phase. In contrast, the gel phase of β-stearyl glucoside showed several distinct transition states prior to lamellar liquid crystal phase. Here the underlying reason for the observed β-stearyl glucoside polymorphism possibly involved strong intermolecular interaction originating from the combination of interlayer H-bonding and intralayer van der Waals forces. © 2019 Elsevier B.V. Elsevier 2019 Article PeerReviewed Ishak, Khairul Anwar and Zahid, Noor Idayu Mat and Velayutham, Thamil Selvi and Annuar, Mohamad Suffian Mohamad and Hashim, Rauzah (2019) Effects of lipid packing and intermolecular hydrogen bond on thermotropic phase transition of stearyl glucoside. Journal of Molecular Liquids, 281. pp. 20-28. ISSN 0167-7322 https://doi.org/10.1016/j.molliq.2019.02.075 doi:10.1016/j.molliq.2019.02.075 |
institution |
Universiti Malaya |
building |
UM Library |
collection |
Institutional Repository |
continent |
Asia |
country |
Malaysia |
content_provider |
Universiti Malaya |
content_source |
UM Research Repository |
url_provider |
http://eprints.um.edu.my/ |
topic |
Q Science (General) QC Physics QD Chemistry QH Natural history |
spellingShingle |
Q Science (General) QC Physics QD Chemistry QH Natural history Ishak, Khairul Anwar Zahid, Noor Idayu Mat Velayutham, Thamil Selvi Annuar, Mohamad Suffian Mohamad Hashim, Rauzah Effects of lipid packing and intermolecular hydrogen bond on thermotropic phase transition of stearyl glucoside |
description |
The sugar anomeric effect on the thermotropic phase transition of stearyl glucoside was investigated. Standard analysis to study the phase transition through differential scanning calorimetry (DSC), and optical polarizing microscopy (OPM) was applied. In addition, small- and wide-angle X-ray scattering (SWAXS) and impedance spectroscopy (IS) were used to elucidate the phase structural information and the dielectric response of the glycolipid self-assembly system, respectively. A distinctive solid-to-liquid crystal phase transition of α- and β-stearyl glucoside was observed. At ambient temperature we observed semi-crystalline structure for the former and gel phase for the latter. α-Stearyl glucoside showed only one-step transition from semi-crystal to lamellar liquid crystal phase. In contrast, the gel phase of β-stearyl glucoside showed several distinct transition states prior to lamellar liquid crystal phase. Here the underlying reason for the observed β-stearyl glucoside polymorphism possibly involved strong intermolecular interaction originating from the combination of interlayer H-bonding and intralayer van der Waals forces. © 2019 Elsevier B.V. |
format |
Article |
author |
Ishak, Khairul Anwar Zahid, Noor Idayu Mat Velayutham, Thamil Selvi Annuar, Mohamad Suffian Mohamad Hashim, Rauzah |
author_facet |
Ishak, Khairul Anwar Zahid, Noor Idayu Mat Velayutham, Thamil Selvi Annuar, Mohamad Suffian Mohamad Hashim, Rauzah |
author_sort |
Ishak, Khairul Anwar |
title |
Effects of lipid packing and intermolecular hydrogen bond on thermotropic phase transition of stearyl glucoside |
title_short |
Effects of lipid packing and intermolecular hydrogen bond on thermotropic phase transition of stearyl glucoside |
title_full |
Effects of lipid packing and intermolecular hydrogen bond on thermotropic phase transition of stearyl glucoside |
title_fullStr |
Effects of lipid packing and intermolecular hydrogen bond on thermotropic phase transition of stearyl glucoside |
title_full_unstemmed |
Effects of lipid packing and intermolecular hydrogen bond on thermotropic phase transition of stearyl glucoside |
title_sort |
effects of lipid packing and intermolecular hydrogen bond on thermotropic phase transition of stearyl glucoside |
publisher |
Elsevier |
publishDate |
2019 |
url |
http://eprints.um.edu.my/24094/ https://doi.org/10.1016/j.molliq.2019.02.075 |
_version_ |
1662755222162767872 |