[Model of water participation in stabilization of charges in primary photosynthesis events]

A hypothesis is elaborated which advances a model of primary change separation in photosynthetic reaction centres. This model implicates two principal ideas: i) photoexcitation (or excitation migration from antenna chlorophyll) of reaction centre dimer (P700, P840, P870-P890) induces a charge transfer state with an electron from one molecule being transferred to another one (corresponding distance must be approximately greater than 6 A); ii) the above state is stabilized due to rapid (congruent to l psec) orientation of electric dipoles of nearest water molecules in the local field of dimmer transition moment. The quantitative energetic calculations confirm the consistence of the hypothesis with the literature data available and enables us to explain the molecular mechanisms of some primary events of photosynthesis.