Download Photoinduced Electron Transfer III by Mattay J. PDF

By Mattay J.

This sequence provides serious reports of the current place and destiny traits in sleek chemical study. it truly is addressed to all study and business chemists who desire to maintain abreast of advances of their topic. normally, contributions are in particular commissioned. The editors and publishers will, besides the fact that, consistently be happy to obtain feedback and supplementary details. Papers are authorized for 'Topics in present Chemistry'' in English.

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Extra resources for Photoinduced Electron Transfer III

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As shown in Phe-containing vesicles [134], under these conditions the stochastic approach describes the 28 Photoinduced Electron Transfer Across Membranes experimental data on the concentration quenching more correctly than the traditional deterministic one. Only few data are available concerning the processes of the intermolecular energy transfer in membranes. Efficient intramembrane energy migration is reported by Kunitake [136] for bilayers that contain chromophores as a part of membrane-forming molecules.

E. the quantum yield of the primary products of electron phototransfer, significantly decreases rather than increases upon addition of D H P due to a more efficient geminate recombination. Similar regularities were observed also when using ferricytochrome c rather than M V 2 + as electron acceptor. Apparently, the electric charge of the membrane can be neutralized by an increase of the inorganic salts concentration. This neutralization is believed to decrease mutual repulsion of the molecules in the membrane, and thus to increase the density of molecules packing in the membrane and its viscosity.

It migrates from the inner surface to the outer surface of the membrane. Within this scheme the quantum yield (¢) of PET across the membrane is determined by the product of the yield of the triplet state (OT), fraction of 3Ru(bpy)~ + molecules quenched by CxaV2+(q~q), yield of radical-ion products from the geminate pair in the primary photochemical act (q%)and the probability (11) for these products avoiding recombination: ¢ = 2¢Tq~q~%n • 22 (28) Photoinduced Electron Transfer Across Membranes Coefficient 2 takes into account that the product of the one electron oxidation of EDTA is capable of reducing the second viologen molecule [109].

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