Dinaphthylpropane fluorescence

Pyrene and dinaphthylpropane fluorescent probes have been used to investigate the structural details of adsorbed layer of SDS at the alumina-water interface. This study supports the basic concepts of hemimicellization. Adsorption isotherm turns out to be S-type. The values of microviscosity of adsorbed layer and normal micelle are 90 to 120 and 8 cP, respectively. The mobility of the probe... [Pg.55]

The emission of dinaphthylpropane derivatives 26-30 consists of monomer (mainly) and excimer fluorescence. The relative intensities of excimer and monomer (/e/Im) were affected to different extents by the presence of 5 X 10" M CD (Table 4). The largest effect is displayed by y-CD, which can... [Pg.30]

Pyrene and dinaphthylpropane (DNP) fluorescence and nitroxide ESR probes have been successfully used to investigate the structure of the adsorbed layer of sodium dodecyl sulfate at the alumina-water interface [11,12], The fluorescence fine structure of pyrene yielded information on the polarity of the microenvironment in the adsorbed layer. Intramolecular excimer formation of DNP was used to measure the microfiuidity of this environment. The results indicate the presence of highly organized surfactant aggregates at the solid-liquid interface, formed by the association of hydrocarbon chains. [Pg.433]

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