Abstract

Spectral properties of 3-methyl-2-3-[3-methyl-1,3-benzothiazolo-2(3H)-ylidene]-1,4-cylopentadien-1-yl-1,3-benzothiazolo-3-ium tosylate (Cyan-Cpentd) in a free state and in the complexes with nucleic acids and synthetic polynucleotides have been investigated by absorption and fluorescence spectroscopy. Significant fluorescence intensity enhancement of dye-nucleic acids complexes is observed. For the first time Cyan-Cpentd is proposed as a new probe for nucleic acid detection. Binding mechanism of Cyan-Cpentd is discussed in view of the NA-ligand interaction models.

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