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Photolysis of dibenzyl ketones adsorbed on zeolite molecular sieves. Correlation of observed cage effects with carbonyl /sup 13/C enrichment efficiencies

Journal Article · · J. Am. Chem. Soc.; (United States)
DOI:https://doi.org/10.1021/ja00289a022· OSTI ID:5622369
The photolysis of 3-(4-methylphenyl)-1-phenyl-2-propanone (1) (4-MeDBK) and 1,3-diphenyl-2-propanone-/sup 13/C/sub 2/ (2') (DBK-/sup 13/C) has been carried out on several commonly available zeolites. Dramatic changes in product distributions for 4-MeDBK (1) photolysis were observed on the several zeolites. Percent cage effects were calculated and rationalized in terms of molecular mobility of photogenerated benzyl radicals in the void volumes of zeolites. Percent cage effects correlate well with /sup 13/C-enrichment efficiencies for DBK-/sup 13/C photolysis on these zeolites and, with the yield of a DBK isomer (PMAP), the para-coupling product of the primary geminate radical pair in the photolysis of DBK-/sup 13/C. 25 references, 5 figures, 2 tables.
Research Organization:
Columbia Univ., New York, NY
OSTI ID:
5622369
Journal Information:
J. Am. Chem. Soc.; (United States), Journal Name: J. Am. Chem. Soc.; (United States) Vol. 107:3; ISSN JACSA
Country of Publication:
United States
Language:
English

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