[Surface-enhanced Raman spectra studies on a novel dipyridophenazine complexes of ruthenium(II) and it's effect on...

SERS is better method at analysing the samples which are prone to emit fluorescence or photodecomposition than other methods. Raman scattering of a novel complexes of Ruthenium (II): Ru(bpy)2dppz and it's effects on DNA were studied with surface-enhanced Raman spectra(SERS). We find that when this complex binds to DNA, only the ligand dppz intercalate into the double helix of DNA, and form a larger conjugate system, affect the metal-to-ligand charge transfer(MLCT), produce strong photoluminescence. All these cause shifting of some Raman peaks of the complex and changex of the relative intensity of some other peaks. And on the charge absorbed spectra, after the addition of DNA, the compex' absorbed peaks of Ru(bpy)2dppz solvent shift to long wavelength, this is also one of the character of the intercalation.