Laser pulse photolysis of amphiphilic anthraquinone-2-sulfonic acid (2-AQS) in liposome buffer solution shows transient electron spin polarization consisting of a net emissive polarization attributable to hydrogen abstraction in a lipid bilayer and a net absorptive pattern caused by electron transfer via the triplet exciplex 3(2-AQS--Cl-)* in an aqueous phase. The diffusion rate of the neutral semiquinone radical from the interior of the lipid bilayer to a bulk water region is determined to be 7 × 105 s-1, suggesting that the rate is slower compared with the micellar system.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry