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Effects of temperature, salt, and deuterium oxide on the self-aggregation of alkylglycosides in dilute solution. 1. n-nonyl-beta-D-glucoside

Ericsson, Caroline LU ; Söderman, Olle LU ; Garamus, V M; Bergström, M and Ulvenlund, Stefan LU (2004) In Langmuir 20(4). p.1401-1408
Abstract
The influence of salt, temperature, and deuterium oxide on the self-aggregation of n-nonyl-beta-D-glucoside (beta-C(9)G(1)) in dilute solution has been investigated by static and dynamic light scattering, neutron scattering, and tensiometry. Scattering data show that the micelles can be described as relatively stiff, elongated structures with a circular cross section. With a decrease of temperature, the micelles grow in one dimension, which makes it surprising that the critical micelle concentration (cmc) shows a concomitant increase. On the other hand, substitution of D2O for H2O causes a large increase in micelle size at low temperatures, without any appreciable effect on cmc. With increasing temperature, the deuterium effect on the... (More)
The influence of salt, temperature, and deuterium oxide on the self-aggregation of n-nonyl-beta-D-glucoside (beta-C(9)G(1)) in dilute solution has been investigated by static and dynamic light scattering, neutron scattering, and tensiometry. Scattering data show that the micelles can be described as relatively stiff, elongated structures with a circular cross section. With a decrease of temperature, the micelles grow in one dimension, which makes it surprising that the critical micelle concentration (cmc) shows a concomitant increase. On the other hand, substitution of D2O for H2O causes a large increase in micelle size at low temperatures, without any appreciable effect on cmc. With increasing temperature, the deuterium effect on the micelle size diminishes. The effects of salt on the micelle size and cmc were found to follow the Hofmeister series. Thus, at constant salt concentration, the micelle size decreased according to the sequence SO42- > Cl- > Br- > NO3- > I- > SCN-, whereas the effect on cmc displays the opposite trend. Here, I- and SCN- are salting-in anions. Similarly, the effects of cations decrease with increasing polarizability in the sequence Li-divided by > Na-divided by > K-divided by > Cs-divided by. At high ionic strength, the systems separate into two micellar phases. The results imply that the size of beta-C(9)G(1) micelles is extremely sensitive to changes in the headgroup size. More specifically, temperature and salt effects on effective headgroup size, including intermolecular interactions and water of hydration, are suggested to be more decisive for the micelle morphology than the corresponding effects on unimer solubility. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Langmuir
volume
20
issue
4
pages
1401 - 1408
publisher
The American Chemical Society
external identifiers
  • wos:000189013400059
  • pmid:15803725
  • scopus:10744228363
ISSN
0743-7463
DOI
10.1021/la035613e
language
English
LU publication?
yes
id
7fbe4a8e-c021-4551-87aa-d11ec11cfee9 (old id 153848)
date added to LUP
2007-07-11 11:01:14
date last changed
2017-07-30 03:30:47
@article{7fbe4a8e-c021-4551-87aa-d11ec11cfee9,
  abstract     = {The influence of salt, temperature, and deuterium oxide on the self-aggregation of n-nonyl-beta-D-glucoside (beta-C(9)G(1)) in dilute solution has been investigated by static and dynamic light scattering, neutron scattering, and tensiometry. Scattering data show that the micelles can be described as relatively stiff, elongated structures with a circular cross section. With a decrease of temperature, the micelles grow in one dimension, which makes it surprising that the critical micelle concentration (cmc) shows a concomitant increase. On the other hand, substitution of D2O for H2O causes a large increase in micelle size at low temperatures, without any appreciable effect on cmc. With increasing temperature, the deuterium effect on the micelle size diminishes. The effects of salt on the micelle size and cmc were found to follow the Hofmeister series. Thus, at constant salt concentration, the micelle size decreased according to the sequence SO42- > Cl- > Br- > NO3- > I- > SCN-, whereas the effect on cmc displays the opposite trend. Here, I- and SCN- are salting-in anions. Similarly, the effects of cations decrease with increasing polarizability in the sequence Li-divided by > Na-divided by > K-divided by > Cs-divided by. At high ionic strength, the systems separate into two micellar phases. The results imply that the size of beta-C(9)G(1) micelles is extremely sensitive to changes in the headgroup size. More specifically, temperature and salt effects on effective headgroup size, including intermolecular interactions and water of hydration, are suggested to be more decisive for the micelle morphology than the corresponding effects on unimer solubility.},
  author       = {Ericsson, Caroline and Söderman, Olle and Garamus, V M and Bergström, M and Ulvenlund, Stefan},
  issn         = {0743-7463},
  language     = {eng},
  number       = {4},
  pages        = {1401--1408},
  publisher    = {The American Chemical Society},
  series       = {Langmuir},
  title        = {Effects of temperature, salt, and deuterium oxide on the self-aggregation of alkylglycosides in dilute solution. 1. n-nonyl-beta-D-glucoside},
  url          = {http://dx.doi.org/10.1021/la035613e},
  volume       = {20},
  year         = {2004},
}