[Influence of acids and metal salts on associates of pheophytin and its derivatives in binary mixtures of solvents].

The experimental investigation of the influence of HCl and Zn, Cd and Cu acetates on association of pheophytin alpha and rodin g7 was carried out in water-ethanolic (4 : 1) media. It is shown that during acidation of a binary solvent mixtures containing pheophytin alpha associate, the formation of product with the absorption maximum 702nm takes place, which is the pigment associated form. The formation of the same product is found under the action of metal acetates on pigment associated complexes. It is assumed that under treatment of water-ethanolic solutions of associates of pheophytin and its derivatives by hydrochloric acid and metal salts. at first introduction of these compound molecules into the aggregate sphere takes place and then the incorporation of the H+ and Me2+ positive ions into the centre of an associate dimer cell occurs along with the transformation of the structure of the pigment associated complexes.