Photoinduced energy and electron transfer in micellar solutions of methylene blue

Autor:	Yvona Rybová, Viktor Řehák
Rok vydání:	1988
Předmět:	chemistry.chemical_compound Electron transfer chemistry Absorption spectroscopy Energy transfer Micellar solutions Pyrene General Chemistry Photochemistry Micelle Fluorescence Methylene blue
Zdroj:	Collection of Czechoslovak Chemical Communications. 53:1-9
ISSN:	1212-6950 0010-0765
DOI:	10.1135/cccc19880001
Popis:	In the micellar medium of sodium dodecyl sulphate the monomer-dimer equilibrium of methylene blue is shifted markedly in favour of the monomer. Methylene blue quenches the fluorescence of pyrene solvated in micelles, which is explained in terms of resonance energy transfer. Based on the theoretical model, the pyrene fluorescence quenching constant in the micelles was determined (kqm = 1.8 106 s-1) and the average pyrene-methylene blue interaction distance for the singlet-singlet energy transfer estimated. The T1 → Tn absorption of methylene blue is quenched by pyrene and tetrasodium salt of ethylenediaminetetraacetic acid (EDTA); the quenching rate constants corresponding to the electron transfer are 5 106 and 2.05 108 1 mol-1 s-1, respectively.
Databáze:	OpenAIRE
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