Premium
TWO WATER‐SOLUBLE FLUORESCENCE PROBES FOR CHEMIEXCITATION STUDIES: SODIUM 9,10‐DIBROMO‐ AND 9, 10‐DIPHENYLANTHRACENE‐2‐SULFONATE. SYNTHESIS, PROPERTIES AND APPLICATION TO TRIPLET ACETONE AND TETRAMETHYLDIOXETANE
Author(s) -
Catalani Luiz H.,
Wilson Thérèse,
Bechara Etelvino J. H.
Publication year - 1987
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.1987.tb05375.x
Subject(s) - acetone , chemistry , photochemistry , aqueous solution , sulfonate , fluorescence , excited state , thermal decomposition , dioxetane , triplet state , decomposition , singlet state , reaction rate constant , sodium , inorganic chemistry , chemiluminescence , organic chemistry , kinetics , molecule , physics , quantum mechanics , nuclear physics
The syntheses of sodium 9,10‐dibromo‐ and 9,10‐diphenylanthracene‐2‐sulfonate (DBAS and DPAS, respectively) are described and their photophysical properties determined. These two probes were used in aqueous solution studies of the kinetic parameters of tetramethyldioxetane thermolysis, which were found to be the same as in organic solvents. The yields of triplet and singlet acetone generated by the decomposition of this dioxetane in water are also comparable to the literature values in organic medium. The lifetime of triplet acetone in water was determined to be 13 ± 2 u.s by a method based on the measurement of the fluorescence decay of DBAS excited via energy transfer from triplet acetone, by the time‐correlated single‐photon counting technique. Sorbate ion quenches triplet acetone from tetramethyldioxetane with a rate constant smaller but close to the diffusion‐controlled limit.