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E. A. Kulikov, V. A. Turanova, S. V. Aleshin, R. G. Vasilov, A. A. Selishcheva
J-aggregates of astaxanthin, its mono- and
diesters
Abstract
The conditions for the production of
astaxanthin ester aggregates was optimized and their physicochemical
characteristics (size, absorption spectra) depending on the conditions of
preparation was determined. Mono and diester fractions were separated by column
chromatography from astaxanthin esters mixture. For the first time, an aqueous
mixture of methanol and tetrahydrofuran was used to obtain J-aggregates of
astaxanthin mono- and diesters, which formation was established by
spectrophotometry. A change in the equilibrium position in the reaction monomer
↔ aggregates was discovered during long-term storage for a month. The
effect of ionic strength on the formation of astaxanthin esters J-aggregates
was studied.
Key words: Mono- and diesters of
astaxanthin, J-aggregates, astaxanthin monomers, spectrophotometry.
Copyright (C) Chemistry Dept., Moscow State University, 2002
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