Unusual photophysical switching in a Ru(II) diimine DNA probe caused by amide functionalisation

摘要

Whereas the complex [Ru(phen)2Medpq]2+(phen = 1,10-phenanthroline; Medpq = 2-methyldipyrido[3,2-f:2,3-h]-quinoxaline) is luminescent in both aqueous and nonaqueous solutions, [Ru(phen)2dpqa]2+(2-pentylamidodipyrido[3,2-f:2,3-h]-quinoxaline) does not emit in water but does so strongly in organic solvents or when bound to DNA-suggesting its use as a photochemical and photophysical probe for nucleic acids.