Abstract

The spectral-luminescent properties of fluorescent probe laurdan (6-dodecanoyl-2-dimethylaminonaphthalene) in homogeneous solvents of different chemical natures and water-micellar solutions (WMS) of non-ionic Triton Х-100 surfactant are investigated. The relative contributions of the basicity and acidity parameters of the solvents to the laurdan fluorescence band shift are estimated. The use of the water-micellar solution of Triton Х-100 as a solvent leads to a considerable change of the fluorescent laurdan properties: occurrence of a new fluorescence band and absence of hydrogen bonding of the laurdan carbonyl group with water molecules. The physical and chemical properties of the Triton Х-100 solvent and the polarity of laurdan surroundings in WMS are estimated.

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