K. Hara et al., Effect of pressure on the critical micelle concentration of neutral surfactant using fluorescence probe method, J PHOTOCH A, 124(3), 1999, pp. 159-162
Citations number
19
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
We have investigated the pressure effect on the critical micelle concentrat
ion (cmc) of neutral surfactant micelle, Triton-X-100 (TX100), in aqueous s
olution by means of the fluorescence probe method. 2-p-Toluidinylnaphthalen
e-6-sulfonate (TNS) was used as a probe molecule, whose fluorescence yield
remarkably increases in the micellar state. With increasing pressure, turno
ver behavior of cmc was observed at ca. 100 MPa. The fluorescence yield of
TNS is sensitive to the local polarity and the local viscosity of the mediu
m, which is associated with the formation of twisted intramolecular charge-
transfer (TICT) state of TNS in the excited state. (C) 1999 Elsevier Scienc
e S.A. All rights reserved.