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Title: Structure and interaction of lithium dodecyl sulfate micelles in the presence of Li-specific macrocyclic cage: A study by SANS

Abstract

We study by small-angle neutron scattering (SANS) the interaction of macrocyclic cage CESTO (C[sub 17]H[sub 37]N[sub 5]) with lithium dodecyl sulfate micelles (LDS) in solution. At pH = 12.7 the CESTO molecule in aqueous solution is neutral and can complex one Li[sup +] ion, incorporating it into its cage. The result is the formation of a positively charged cage, and it is attracted by the negatively charged head groups of dodecyl sulfates in the micelle. We show that there is a strong tendency for the CESTO-Li[sup +] complex to be incorporated into the outer layer of the micelle with a consequence of a drastic reduction of the effective charge of the micelle. Using a two-layer model for the micellar structure factor and a multicomponent ionic solution theory of Khan and Ronis for the intermicellar structure factor, we have satisfactorily fitted all the SANS data at different surfactant concentrations and various molar ratios of CESTO to LDS. The extracted parameters include the micellar aggregation number, the effective micellar charge, and the fraction of CESTO incorporated into the outer layers of the micelle. 24 refs., 6 figs., 4 tabs.

Authors:
;  [1];  [2];  [3]
  1. MIT, Cambridge, MA (United States)
  2. Univ. of Florence (Italy)
  3. Laboratoire Leon Brillouin, Gif-Sur-Yvette (France)
Publication Date:
OSTI Identifier:
6767985
DOE Contract Number:  
FG02-90ER45429
Resource Type:
Journal Article
Journal Name:
Journal of Physical Chemistry; (United States)
Additional Journal Information:
Journal Volume: 98:40; Journal ID: ISSN 0022-3654
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; 38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY; LITHIUM COMPLEXES; CHEMICAL REACTIONS; MICELLAR SYSTEMS; NEUTRONS; SCATTERING; ORGANIC COMPOUNDS; AQUEOUS SOLUTIONS; COMPILED DATA; LITHIUM COMPOUNDS; MATHEMATICAL MODELS; ALKALI METAL COMPOUNDS; BARYONS; COMPLEXES; DATA; DISPERSIONS; ELEMENTARY PARTICLES; FERMIONS; HADRONS; INFORMATION; MIXTURES; NUCLEONS; NUMERICAL DATA; SOLUTIONS; 400201* - Chemical & Physicochemical Properties; 990200 - Mathematics & Computers; 400600 - Radiation Chemistry

Citation Formats

Liu, Y C, Chen, S H, Baglioni, P, and Teixeira, J. Structure and interaction of lithium dodecyl sulfate micelles in the presence of Li-specific macrocyclic cage: A study by SANS. United States: N. p., 1994. Web. doi:10.1021/j100091a041.
Liu, Y C, Chen, S H, Baglioni, P, & Teixeira, J. Structure and interaction of lithium dodecyl sulfate micelles in the presence of Li-specific macrocyclic cage: A study by SANS. United States. https://doi.org/10.1021/j100091a041
Liu, Y C, Chen, S H, Baglioni, P, and Teixeira, J. Thu . "Structure and interaction of lithium dodecyl sulfate micelles in the presence of Li-specific macrocyclic cage: A study by SANS". United States. https://doi.org/10.1021/j100091a041.
@article{osti_6767985,
title = {Structure and interaction of lithium dodecyl sulfate micelles in the presence of Li-specific macrocyclic cage: A study by SANS},
author = {Liu, Y C and Chen, S H and Baglioni, P and Teixeira, J},
abstractNote = {We study by small-angle neutron scattering (SANS) the interaction of macrocyclic cage CESTO (C[sub 17]H[sub 37]N[sub 5]) with lithium dodecyl sulfate micelles (LDS) in solution. At pH = 12.7 the CESTO molecule in aqueous solution is neutral and can complex one Li[sup +] ion, incorporating it into its cage. The result is the formation of a positively charged cage, and it is attracted by the negatively charged head groups of dodecyl sulfates in the micelle. We show that there is a strong tendency for the CESTO-Li[sup +] complex to be incorporated into the outer layer of the micelle with a consequence of a drastic reduction of the effective charge of the micelle. Using a two-layer model for the micellar structure factor and a multicomponent ionic solution theory of Khan and Ronis for the intermicellar structure factor, we have satisfactorily fitted all the SANS data at different surfactant concentrations and various molar ratios of CESTO to LDS. The extracted parameters include the micellar aggregation number, the effective micellar charge, and the fraction of CESTO incorporated into the outer layers of the micelle. 24 refs., 6 figs., 4 tabs.},
doi = {10.1021/j100091a041},
url = {https://www.osti.gov/biblio/6767985}, journal = {Journal of Physical Chemistry; (United States)},
issn = {0022-3654},
number = ,
volume = 98:40,
place = {United States},
year = {1994},
month = {10}
}