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Ground state and excited state charge transfer complexes between electron donors and pyrylium salts

Authors
Journal
Journal of Photochemistry
0047-2670
Publisher
Elsevier
Publication Date
Volume
26
Identifiers
DOI: 10.1016/0047-2670(84)80032-5

Abstract

Abstract The electron acceptor behaviour of seven pyrylium salts was examined. The formation of two complexes was demonstrated in the presence of electron donor molecules. One complex occurs in the ground state and absorbs at longer wavelength (ϵ ≈ 1800 – 2000 M −1 cm −1) than the starting compound and is formed with an association constant of the order of unity. The other complex is formed in the excited state with a rate constant which approaches that of diffusion when the oxidation potential of the electron donor is lower than 1.3 V.

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