2014, №2

сс. 4-10

Activity of fluorine-substituted tetraphenylporphyrins in the photosensitized oxidation of organic substrates in supercritical carbon dioxide

2014, №2

сс. 4-10

Цитировать

I.V. Shershnev, N.N. Glagolev, N.A. Bragina, P.S. Timashev, V.N. Bagratashvili, A.B. Solovieva

Key words: supercritical carbon dioxide, photosensitized oxidation, anthracene, porphyrins

A photosensitized oxidation of anthracene and cholesterol in supercritical carbon
dioxide (SC-CO2) in the presence of fluorinated tetraphenylporphyrins (FTPP)
containing hydrocarbon substituents with different chain lengths (characterized by
the number of carbon atoms n) in para-position of the phenyl rings as sensitizers is
carried out for the first time. The rate of such process in SC-CO2 is much higher
than in conventional organic solvents, in chloroform in particular. The value of the
apparent rate constant of anthracene photooxidation keff increases with increasing n
due to a higher probability of the formation of the complex between the substrate and
a more spatially extended FTPP molecule at increasing n number. Such complex can be
an intermediate in the formation of anthraquinone — the only product in the
photooxidation of anthracene in SC-CO2.

doi:10.1134/S1990793114080119