Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
28616 | Journal of Photochemistry and Photobiology A: Chemistry | 2006 | 8 Pages |
Abstract
Acid–base properties of 3,5-dimethyl-1,7-diphenyl-bis-pyrazolo-[3,4-b;4′,3′-e]-pyridine (BPP) in the ground state and in the first excited singlet state were investigated in non-aqueous solutions. Absorption and stationary fluorescence spectroscopy, supersonic jet spectroscopy as well as the calculations of effective valence potentials were applied as methods. The sequence of the protonation of BPP nitrogen atoms in solutions and the formation of complexes with water in molecular beams were discussed.
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Authors
Danuta Grabka, Wojciech Boszczyk, Yuriy Stepanenko, Stanisław Styrcz, Marta Kubik, Krystyna Rotkiewicz, Andrzej Danel,