Fluorescence saturation of dye molecules in water pools of reversed micelles

Abstract

Rhodamine 6G has been used as a fluorescence probe in AOT reversed micelles systems with the different amounts of solubilized water (hydratation power ω). The saturation of fluorescence and the lifetime of dye molecules were measured. The absorption cross section values were calculated from the saturation curves. We showed the differences in values of the absorption cross section, lifetime and velocity of fluorescence saturation in micellar phase with different ω and in comparison to bulk phase. Additionally, the structure of hydrated reversed micelles has been studied by the method of correlation spectroscopy. The influence of ω on size and shape of micelles was detected.

The study of structure and photophysical processes of polyelectrolyte-surfactant-dye molecules complex by laser spectroscopy

“…The principle scheme of experiment is introduce in [4]. The absorption cross section measurements of dye molecules were carry out using Perkin Elmer Lambda 35.…”

“…The pulsed copper laser (λ = 511 nm) was used in the experiments for fluorescence saturation. The principle scheme of experiment is introduce in [4]. The absorption cross section measurements of dye molecules were carry out using Perkin Elmer Lambda 35.…”

“…Heightened interest for polyelectrolyte-micelle complexes is due to the application of such structures as a model for the different biological systems. Due to this fact getting information about structure changes and possibility of their control take on special significance [2][3][4][5].…”

Investigation of cluster formation in reversed micelles systems by the method of correlation spectroscopy of scattered light

“…Bulk water presents within the micelles at ω values, which are more than some critical value, and the percentage of bulk water grows with ω increase. The evolution of size [4][5][6] and the variation of physicochemical properties [7,8] of water pools with water content increase were shown.…”

“…The influence of surfactant concentration on the micellar clustering at fixed ω and at different temperatures was obtained in [15,16]. The clustering of reversed micelles at room temperature with increase of ω values up to ω > 40 was found out in [6]. There is the number of works, concerning the interand intra-micellar energy transfer, which results are explained by the micellar interaction [17,18].…”