%0 Journal Article
%T Photochemical characteristics of diclofenac and its photodegradation of inclusion complexes with ¦Â-cyclodextrins
%A Qin
%A Minmin
%A Yang
%A Haifeng
%A Chen
%A Shengwen
%A Xie
%A Hongyong
%A Guan
%A Jie
%J Qu¨ªmica Nova
%D 2012
%I Sociedade Brasileira de Qu¨ªmica
%R 10.1590/S0100-40422012000300022
%X diclofenac is one of most frequently detected compounds in the water cycle. in this work, the effect of initial concentration, liquid inclusion complexes with ¦Â-cyclodextrins (¦Â-cds) on the photodegradation of diclofenac were studied. six phototransformation products were detected by hplc chromatograms. uv-absorption spectra of diclofenac and phototransformation products were determined. one of the phototransformation products was identified. the degradation followed pseudo-first-order kinetics. the experiment showed that irradiation of diclofenac in the presence of ¦Â-cds increase photodegradation rate and determined the optimal molar ratio of diclofenac to ¦Â-cds as 1:2. the reduced photohaemolytic activity of diclofenac in the presence of ¦Â-cds may be attributed to the sequestering and stabilizing of the radical intermediates and /or photoproducts by complexation.
%K diclofenac
%K ¦Â-cyclodextrins
%K photodegradation.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0100-40422012000300022&lng=en&nrm=iso&tlng=en