Azarani, A. published the artcileElectron transfer reactions between excited diarylmethyl and triarylmethyl carbocations and aromatic donors, Computed Properties of 596-38-3, the publication is Journal of Photochemistry and Photobiology, A: Chemistry (1991), 57(1-3), 175-89, database is CAplus.
The excited singlet states of diarylmethyl and triarylmethyl carbocations were characterized by fluorescence. The dibenzosuberenyl, xanthenyl, and 9-phenylxanthenyl cations are strongly fluorescent and have fluorescence lifetimes in the 30-40 ns range in 2,2,2-trifluoroethanol. The fluorescence of each of these cations is efficiently quenched by a variety of substituted aromatics (e.g., cumene, anisole, toluene) with rate constants in excess of 109 M-1 s-1. There is a correlation between the observed rate constants and the oxidation potential of the aromatic quencher which suggests that an electron transfer process occurs to generate a radical/radical cation pair. This hypothesis is confirmed by irradiation of the dibenzosuberenyl cation in the presence of benzyltrimethylsilane. This reaction produces 5-benzyldibenzocycloheptene, which is formed by addition of the benzyl radical produced via cleavage of the silane radical cation to either the dibenzosuberenyl radical or cation. Quenching studies suggest that the efficiency of product formation is controlled by the competition between cage escape and back electron transfer for the initial geminate radical/radical ion pair.
Journal of Photochemistry and Photobiology, A: Chemistry published new progress about 596-38-3. 596-38-3 belongs to alcohols-buliding-blocks, auxiliary class Other Aromatic Heterocyclic,Benzene,Alcohol, name is 9-Phenyl-9H-xanthen-9-ol, and the molecular formula is C19H14O2, Computed Properties of 596-38-3.
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