The excited-state intramolecular H-atom transfer of hypericin (Hyp) was investigated as a function of pH in monodispersed reverse micelles formed by sodium bis(2-ethylhexyl)sulfosuccinate/heptane/water and in complexes with Tb3 under conditions in which one of the two carbonyl groups of Hyp is incapable of accepting a hydrogen atom. The results of pump-probe transient absorption experiments provide no evidence for a concerted H-atom transfer mechanism.
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1 February 2001
Is the Excited-State H-atom Transfer in Hypericin Concerted?
J. Park,
A. Datta,
P. K. Chowdhury,
J. W. Petrich
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Photochemistry and Photobiology
Vol. 73 • No. 2
February 2001
Vol. 73 • No. 2
February 2001