Journal of Physical Chemistry p. 4447 - 4451 (1988)
Update date:2022-08-17
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Monti, Sandra
Flamigni, Lucia
Martelli, Alessandro
Bortolus, Pietro
The photochemistry of benzophenone aqueous solutions in the presence of cyclodextrins (CDx) has been studied by stationary and pulsed techniques.Quenching of the phosphorescence is the consequence of hydrogen abstraction following the inclusion in the cyclodextrin cavity of the triplet benzophenone.The H-abstraction process has close analogies with the same reaction in micelles.Radical pair decay is controlled by the dimensions of the CDx cavity: intersystem crossing prevails in the presence of β-CDx, radical excit in the presence of α- and γ-CDx.The fate of the escaped radical also depends on the cavity dimensions, as revealed by the photoreduction quantum yields.
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