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The effect of chain length on the melting temperature and size of dialkyldimethylammonium bromide vesicles

Feitosa, E ; Jansson, Jörgen and Lindman, Björn LU (2006) In Chemistry and Physics of Lipids 142(1-2). p.128-132
Abstract
Differential scanning calorimetry (DSc) and dynamic light scattering (DLS) were used to obtain the gel to liquid-crystalline phase transition temperature (T-m) and the apparent hydrodynamic radius (R-h) of spontaneously formed cationic vesicles of dialkyldimethylammonium bromide salts (CnH2n+1)(2)(CH3)(2)N+center dot Br-, with varying chain lengths. The preparation of cationic vesicles from aqueous solution of these surfactants, for n = 12, 14, 16 and 18 (DDAB, DTDAB, DHDAB and DODAB, respectively), requires the knowledge of the surfactant gel to liquid-crystalline phase transition temperature, or melting temperature (T-m) since below this temperature these surfactants are poorly or not soluble in water. That series of cationic surfactants... (More)
Differential scanning calorimetry (DSc) and dynamic light scattering (DLS) were used to obtain the gel to liquid-crystalline phase transition temperature (T-m) and the apparent hydrodynamic radius (R-h) of spontaneously formed cationic vesicles of dialkyldimethylammonium bromide salts (CnH2n+1)(2)(CH3)(2)N+center dot Br-, with varying chain lengths. The preparation of cationic vesicles from aqueous solution of these surfactants, for n = 12, 14, 16 and 18 (DDAB, DTDAB, DHDAB and DODAB, respectively), requires the knowledge of the surfactant gel to liquid-crystalline phase transition temperature, or melting temperature (T-m) since below this temperature these surfactants are poorly or not soluble in water. That series of cationic surfactants has been widely investigated as vesicle-forming surfactants, although C-12 and C-18, DDAB and DODAB are by far the most investigated from this series. The dependence of T-m of these surfactants on the number n of carbons in the surfactant tails is reported. The T-m obtained by DSC increases non-linearly with n, and the vesicle apparent radius R-h is about the same for DHDAB and DODAB, but much smaller for DDAB. (c) 2006 Elsevier Ireland Ltd. All rights reserved. (Less)
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publication status
published
subject
keywords
calorimetry, dynamic light scattering, melting temperature, hydrodynamic radius, differential scanning, phase behavior, DDAB, DTDAB, DHDAB, DODAB, cationic surfactants, dialkyldimethylammonium salts, cationic vesicles
in
Chemistry and Physics of Lipids
volume
142
issue
1-2
pages
128 - 132
publisher
Elsevier
external identifiers
  • pmid:16574087
  • wos:000238797000013
  • scopus:33747208369
ISSN
0009-3084
DOI
10.1016/j.chemphyslip.2006.02.001
language
English
LU publication?
yes
id
3ea0300e-fadc-42ba-9d42-21f87e707299 (old id 404607)
date added to LUP
2016-04-01 16:34:55
date last changed
2021-05-05 02:52:56
@article{3ea0300e-fadc-42ba-9d42-21f87e707299,
  abstract     = {Differential scanning calorimetry (DSc) and dynamic light scattering (DLS) were used to obtain the gel to liquid-crystalline phase transition temperature (T-m) and the apparent hydrodynamic radius (R-h) of spontaneously formed cationic vesicles of dialkyldimethylammonium bromide salts (CnH2n+1)(2)(CH3)(2)N+center dot Br-, with varying chain lengths. The preparation of cationic vesicles from aqueous solution of these surfactants, for n = 12, 14, 16 and 18 (DDAB, DTDAB, DHDAB and DODAB, respectively), requires the knowledge of the surfactant gel to liquid-crystalline phase transition temperature, or melting temperature (T-m) since below this temperature these surfactants are poorly or not soluble in water. That series of cationic surfactants has been widely investigated as vesicle-forming surfactants, although C-12 and C-18, DDAB and DODAB are by far the most investigated from this series. The dependence of T-m of these surfactants on the number n of carbons in the surfactant tails is reported. The T-m obtained by DSC increases non-linearly with n, and the vesicle apparent radius R-h is about the same for DHDAB and DODAB, but much smaller for DDAB. (c) 2006 Elsevier Ireland Ltd. All rights reserved.},
  author       = {Feitosa, E and Jansson, Jörgen and Lindman, Björn},
  issn         = {0009-3084},
  language     = {eng},
  number       = {1-2},
  pages        = {128--132},
  publisher    = {Elsevier},
  series       = {Chemistry and Physics of Lipids},
  title        = {The effect of chain length on the melting temperature and size of dialkyldimethylammonium bromide vesicles},
  url          = {http://dx.doi.org/10.1016/j.chemphyslip.2006.02.001},
  doi          = {10.1016/j.chemphyslip.2006.02.001},
  volume       = {142},
  year         = {2006},
}