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Molecular Crystals and Liquid Crystals Volume 467, 2007 - Issue 1
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Electronic Processes in Polymer Composites and Biological Structures. New Materials for Organic Leds, Fets and Photovoltaics

Two-Photon Excited Luminescent Styryl Dyes as Probes for the DNA Detection and Imaging. Photostability and Phototoxic Influence on DNA

V. M. Yashchuk Physics Faculty, Taras Shevchenko Kyiv National University, Kyiv, UkraineCorrespondence[email protected]
,
V. V. Gusak Physics Faculty, Taras Shevchenko Kyiv National University, Kyiv, Ukraine
,
I. M. Dmytruk Physics Faculty, Taras Shevchenko Kyiv National University, Kyiv, Ukraine
,
V. M. Prokopets Physics Faculty, Taras Shevchenko Kyiv National University, Kyiv, Ukraine
,
V. Yu. Kudrya Physics Faculty, Taras Shevchenko Kyiv National University, Kyiv, Ukraine; National Agricultural University of Ukraine, Kyiv, Ukraine
,
M. Yu. Losytskyy Physics Faculty, Taras Shevchenko Kyiv National University, Kyiv, Ukraine; Institute of Molecular Biology and Genetics of NASU, Kyiv, Ukraine
,
V. P. Tokar Physics Faculty, Taras Shevchenko Kyiv National University, Kyiv, Ukraine; Institute of Molecular Biology and Genetics of NASU, Kyiv, Ukraine
,
Ya. O. Gumenyuk National Agricultural University of Ukraine, Kyiv, Ukraine
,
S. M. Yarmoluk Institute of Molecular Biology and Genetics of NASU, Kyiv, Ukraine
,
V. B. Kovalska Institute of Molecular Biology and Genetics of NASU, Kyiv, Ukraine
,
A. O. Balanda Institute of Molecular Biology and Genetics of NASU, Kyiv, Ukraine
&
D. V. Kryvorotenko Institute of Molecular Biology and Genetics of NASU, Kyiv, Ukraine
 show all
Pages 325-338 | Published online: 22 Sep 2010
 
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Abstract

The photostability and phototoxic influence on DNA of several styryl dyes are investigated by studying the absorption, fluorescence and phosphorescence spectra of these dyes and DNA + dye systems. The dyes Bos-1, DBos-24, and DBos-30 exhibit a rather intensive fluorescence under the two-photon excitation. Changes of the optical density in the wavelength regions 250 ÷ 300 nm (DNA absorption) and 370 ÷ 650 nm (dye absorption) of DNA + dye solutions caused by the visible light irradiation are fixed. Bos-1 and DBos-30 dyes bound to DNA are more photostable than those in free state, being photochemically safe for DNA. DBos-24 and Dst-MdO dyes show a slight phototoxic effect on DNA.

Acknowledgments

This work was supported in part by the Science and Technology Center in Ukraine (STCU), Project #U3104k.

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