Spectral Properties and Photodynamic Activity of Complexes of Polycationic Derivative of Fullerene C60 with Xanthene Dye Fluorescein


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Abstract

Using spectrophotometry and stationary and kinetic fluorimetry, we have shown that xanthene dye fluorescein forms complexes with polycationic derivative of fullerene in aqueous solutions mainly due to electrostatic interactions. It is found that efficient quenching of singlet excited states of dye occurs in the structure of these complexes due to the transfer of excitation or electron from dye to fullerene. As a result, the photodynamic activity of the newly formed complex is much higher than that of fluorescein and fullerene derivative. This effect makes it possible to predict the formation of new-generation hybrid photodynamic preparations using dyes excited only into a singlet state; as a result, directed searches for these dyes are significantly facilitated.

About the authors

A. I. Kotel’nikov

Institute of Problems of Chemical Physics

Author for correspondence.
Email: kotel@icp.ac.ru
Russian Federation, Chernogolovka, Moscow oblast, 142432

A. Yu. Rybkin

Institute of Problems of Chemical Physics

Email: kotel@icp.ac.ru
Russian Federation, Chernogolovka, Moscow oblast, 142432

N. S. Goryachev

Institute of Problems of Chemical Physics

Email: kotel@icp.ac.ru
Russian Federation, Chernogolovka, Moscow oblast, 142432

A. Yu. Belik

Institute of Problems of Chemical Physics

Email: kotel@icp.ac.ru
Russian Federation, Chernogolovka, Moscow oblast, 142432

P. A. Troshin

Institute of Problems of Chemical Physics

Email: kotel@icp.ac.ru
Russian Federation, Chernogolovka, Moscow oblast, 142432

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