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Multifield proton longitudinal relaxation measurements for the determination of correlation times in surfactant aggregates

✍ Scribed by A. Belmajdoub; B. Diter; D. Canet

Publisher
Elsevier Science
Year
1986
Tongue
English
Weight
344 KB
Volume
131
Category
Article
ISSN
0009-2614

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✦ Synopsis

This work demonstrates the use of proton longitudinal relaxation to determine correlation times associated with the slow motions affecting a surfactant molecule engaged in a micellar aggregate. The longitudinal relaxation time Tr of the proton signal corresponding to methylenes in the aliphatic chain is monitored as a function of the Larmor frequency v. Til versus v is interpreted according to the "two-step" model of Halle and Wennerstriim. The method has been checked on the decylammonium chloride/DsO system at two different concentrations, corresponding to spherical and elongated micelles respectively. Measurements have been taken from 3.4 to 200 MHz.

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