Thermotropic phase behaviour of long-chain alkylmaltosides
(2005) In Physical Chemistry Chemical Physics 7(15). p.2970-2977- Abstract
- The thermotropic phase behaviour and phase structure of crystalline and non-crystalline n-tetradecyl-beta-D-maltoside (C(14)G(2)) and n-hexadecyl-beta-D-maltoside (C(16)G(2)) have been investigated by means of differential scanning calorimetry and X-ray techniques. Upon lyophilisation, both compounds form a solid, lamellar phase comprising disordered head groups and hexagonally packed alkyl chains that are suggested to be tilted and interdigitated. This ordered lamellar phase melts into a metastable lamellar liquid crystal, which re-crystallises to a high-temperature crystalline polymorph comprising interdigitated, non-tilted alkyl chains. Remarkably, the high-temperature polymorph of C(14)G(2) has the same melting point as that of... (More)
- The thermotropic phase behaviour and phase structure of crystalline and non-crystalline n-tetradecyl-beta-D-maltoside (C(14)G(2)) and n-hexadecyl-beta-D-maltoside (C(16)G(2)) have been investigated by means of differential scanning calorimetry and X-ray techniques. Upon lyophilisation, both compounds form a solid, lamellar phase comprising disordered head groups and hexagonally packed alkyl chains that are suggested to be tilted and interdigitated. This ordered lamellar phase melts into a metastable lamellar liquid crystal, which re-crystallises to a high-temperature crystalline polymorph comprising interdigitated, non-tilted alkyl chains. Remarkably, the high-temperature polymorph of C(14)G(2) has the same melting point as that of C(16)G(2), namely 105 degrees C for both surfactants. A low-temperature polymorph of anhydrous C(14)G(2) crystallises from water at room temperature, whereas the hemihydrate of C(14)G(2) crystallises at 6 degrees C from water, or from chloroform containing trace water. X-ray data suggest both these crystalline modifications to comprise interdigitated and tilted alkyl chains. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/157340
- author
- Ericsson, Caroline LU ; Ericsson, Louise C ; Kocherbitov, Vitaly LU ; Söderman, Olle LU and Ulvenlund, Stefan LU
- organization
- publishing date
- 2005
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Chemistry Chemical Physics
- volume
- 7
- issue
- 15
- pages
- 2970 - 2977
- publisher
- Royal Society of Chemistry
- external identifiers
-
- pmid:16189619
- wos:000230596900035
- scopus:23844452366
- pmid:16189619
- ISSN
- 1463-9084
- DOI
- 10.1039/b502922h
- language
- English
- LU publication?
- yes
- id
- 831df8c1-9219-4b43-bc4a-2edb75c59e70 (old id 157340)
- date added to LUP
- 2016-04-01 15:39:48
- date last changed
- 2022-04-22 08:52:24
@article{831df8c1-9219-4b43-bc4a-2edb75c59e70,
abstract = {{The thermotropic phase behaviour and phase structure of crystalline and non-crystalline n-tetradecyl-beta-D-maltoside (C(14)G(2)) and n-hexadecyl-beta-D-maltoside (C(16)G(2)) have been investigated by means of differential scanning calorimetry and X-ray techniques. Upon lyophilisation, both compounds form a solid, lamellar phase comprising disordered head groups and hexagonally packed alkyl chains that are suggested to be tilted and interdigitated. This ordered lamellar phase melts into a metastable lamellar liquid crystal, which re-crystallises to a high-temperature crystalline polymorph comprising interdigitated, non-tilted alkyl chains. Remarkably, the high-temperature polymorph of C(14)G(2) has the same melting point as that of C(16)G(2), namely 105 degrees C for both surfactants. A low-temperature polymorph of anhydrous C(14)G(2) crystallises from water at room temperature, whereas the hemihydrate of C(14)G(2) crystallises at 6 degrees C from water, or from chloroform containing trace water. X-ray data suggest both these crystalline modifications to comprise interdigitated and tilted alkyl chains.}},
author = {{Ericsson, Caroline and Ericsson, Louise C and Kocherbitov, Vitaly and Söderman, Olle and Ulvenlund, Stefan}},
issn = {{1463-9084}},
language = {{eng}},
number = {{15}},
pages = {{2970--2977}},
publisher = {{Royal Society of Chemistry}},
series = {{Physical Chemistry Chemical Physics}},
title = {{Thermotropic phase behaviour of long-chain alkylmaltosides}},
url = {{http://dx.doi.org/10.1039/b502922h}},
doi = {{10.1039/b502922h}},
volume = {{7}},
year = {{2005}},
}