[Photoinduced electron transfer through the hydrocarbon zone of membranes at low temperatures]

The photoinduced electron transfer at low temperatures in phospholipide membranes (liposomes) containing chlorophyll and 3 X 10-docsilpalmitate has been investigated. The reduction of 3 X 10-docsilpalmitate was estimated by ESR spectrometry. When diffusion movement of the molecules in membranes was blocked by low temperatures the photoinduced electron transfer has been found. The mechanism of these phenomena were analyzed on the base of donor-acceptor interaction through sigma bonds in hydrocarbon bridged donor-acceptor complexes. The separation of charges in these complexes is regarded as occurs by the migration of a hole along the hydrocarbon system. An approximate estimate of the charge mobility in the saturated hydrocarbon side chain of chlorophyll and activation energy of these movement was obtained.