Fluorescence quenching of EB-DNA complex by a novel di-bipyridyl ruthenium(II) complex of p-tert-butyltetrathiacalix[4]arene

摘要

A six-coordinated Ru(II) complex of [(bpy)_2Ru(S,O-H_2L)] centre dot 1.5CH_3CN,where H_4L is a p-tert-butyltetrathiacalix[4]arene,was synthesized and characterized by electrospray ionization mass spectrometry and X-ray crystallographic analysis.Fluorescence quenching of ethidium bromide-DNA complex by the Ru(II) complex obeys linear Stern-Volmer equation.The quenching was realized via the DNA-mediated electron transfer from the excited ethidium to the Ru(II) complex.