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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Bibliographic Details
Published in:Journal of photochemistry and photobiology. A, Chemistry. Chemistry., 1997-02, Vol.103 (1), p.137-141
Main Authors: de Lucas, Nanci Camara, Netto-Ferreira, J.C.
Format: Article
Language:English
Subjects:
Cyclodextrin
Hydrogen abstraction
Inclusion complex
Recombination
ß-Cleavage
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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