New phosphonate-substituted tricarbocyanines and their interaction with bovine serum albumin


New tricarbocyanine dyes with phosphonate groups (2, 3) were synthesized and their binding constants to bovine serum albumin (BSA) were determined. The binding constants of the synthesized tricarbocyanines and cardiogreen (1) (K b ~ 105 M–1) are similar, indicating an insignificant contribution of the Coulomb interaction to the complex formation, which is determined by the polymethine chain interaction with BSA. The fluorescence lifetimes attest to the formation of two types of complexes: the lifetime of the dye complex with BSA with a major contribution (~80%) is 740–800 ps, and a lifetime of ~210 ps corresponds to the complex of dye aggregates with BSA.

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Correspondence to T. A. Podrugina.

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Original Russian Text © V.A. Kuzmin, T.A. Podrugina, T.D. Nekipelova, I.A. Doroshenko, M.V. Proskurnina, G.V. Golovina, E.V. Radchenko, A.A. Kostyukov, V.V. Temnov, E.D. Matveeva, V.A. Palyulin, N.S. Zefirov, 2016, published in Doklady Akademii Nauk, 2016, Vol. 470, No. 3, pp. 293–296.

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Kuzmin, V.A., Podrugina, T.A., Nekipelova, T.D. et al. New phosphonate-substituted tricarbocyanines and their interaction with bovine serum albumin. Dokl Chem 470, 264–267 (2016).

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