Effect of ß-cyclodextrin complexation on the photochemistry of α-phenoxyacetophenone

The photochemistry of α-phenoxyacetophenone complexed with β-cyclodextrin was investigated in the solid state and in aqueous solution. A comparison was made with the irradiation of α-phenoxyacetophenone in different organic solvents. The main observations were as follows: (1) the photolysis of solid...

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Published inJournal of photochemistry and photobiology. A, Chemistry. Vol. 103; no. 1; pp. 137 - 141
Main Authors de Lucas, Nanci Camara, Netto-Ferreira, J.C.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.02.1997
Subjects
Cyclodextrin
Hydrogen abstraction
Inclusion complex
Recombination
ß-Cleavage
Hydrogen abstraction
Cyclodextrin
Recombination
ß-Cleavage
Inclusion complex
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Summary:The photochemistry of α-phenoxyacetophenone complexed with β-cyclodextrin was investigated in the solid state and in aqueous solution. A comparison was made with the irradiation of α-phenoxyacetophenone in different organic solvents. The main observations were as follows: (1) the photolysis of solid α-phenoxyacetophenone-ß-cyclodextrin complexes preferentially yields recombination products, whereas in aqueous solution these complexes give rise to hydrogen abstraction products; (2) the photolysis of α-phenoxyacetophenone in solvents of increasing hydrogen donor ability leads to an increase in the formation of products derived from intermolecular hydrogen abstraction.
ISSN:1010-6030
1873-2666
DOI:10.1016/S1010-6030(97)85301-4