NMR diffusometry and conductometry study of the host-guest association between beta-cyclodextrin and dodecane 1,12-bis(trimethylammonium bromide)
Research output: Contribution to journal › Article
Abstract
Surfactants form association complexes with cyclodextrins. In the present investigation we have used NMR-diffusometry and electrical conductivity to follow the interactions which take place between ss-cyclodextrm and a bolaform surfactant: dodecane 1, 1 2-bis(trimethylammonium bromide). Both H-1 NMR self-diffusion and conductometry data indicate the formation of a 1: 1 inclusion complex. Assuming this stoichiometry, it was possible to calculate the association constant; from the analysis of the self-diffusion coefficients of free ss-cyclodextrin and the bolaform surfactant an association constant K = 3 x 10(3) Mb(-1) was obtained while the analysis of conductivity data gave a comparable value of K = 2.5 x 10(3) M-1. (c) 2006 Elsevier Inc. All rights reserved.
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Research areas and keywords | Subject classification (UKÄ) – MANDATORY
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Original language | English |
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Pages (from-to) | 782-787 |
Journal | Journal of Colloid and Interface Science |
Volume | 300 |
Issue number | 2 |
Publication status | Published - 2006 |
Publication category | Research |
Peer-reviewed | Yes |