Electron Transport across Vesicle Bilayers Sensitized by Pyrenes: Design and Syntheses of Unsymmetrically Substituted Bifunctional Pyrenes Acting as Excellent Sensitizers
(Asc-) in the inner waterpool to methylviologen (MV2+) in the outer aqueous solution was driven by the irradiation of pyrene derivatives embedded in the vesicle bilayers. The initial rate of MV2+ reduction is dependent on the substituent group of the pyrenyl ring; a hydrophilic functional group linked with the pyrenyl ring by a short methylene chain acts as a sensitizer for the electron transport. Mechanistic
Amphiphilic pyrenecarboxylic acids: incorporation into vesicle membrane and ability as sensitizer for electron transport reactions
作者:Ryo Sasaki、Yuki Nako、Shigeru Murata
DOI:10.1016/j.tet.2009.07.033
日期:2009.9
The novel pyrenecarboxylic acids 1-3 having a single or double hydrophobic alkyl chain were synthesized, and their photophysical properties were investigated in solutions and vesicle membranes. In analogy with parent 1-pyrenecarboxylic acid, the absorption and fluorescence spectra of 1-3 were changed with the H+ concentration. The amphiphilic pyrenecarboxylic acids 1-3 had good solubility in the vesicle membranes, and acted as an excellent sensitizer for the electron transport from an electron donor in the inner waterpool of the vesicle to an electron acceptor in the outer aqueous phase across vesicle membranes. (C) 2009 Elsevier Ltd. All rights reserved.