Synthesis and properties of a novel nickel(II) cyclam (cyclam = 1,4,8,11-tetraazacyclotetradecane) complex covalently attached to Ru(bpy)2+3 (bpy = 2,2′-bipyridyl)
摘要:
A ditopic ligand bpy-cyclam (1) and its heterometallo-binuclear complex Ru (bpy)(2)(bpy-cyclam-Ni)(4+) (3) as well as the related intermediate complex Ru(bpy)(2)(bpy-cyclam-2H)(4+) (2) have been synthesized and characterized. Their spectroscopic and redox properties have been studied. An efficient intramolecular fluorescence quenching phenomenon was observed for complex 3, which was composed of an Ru(bpy)(3)(2+) core and an Ni(cyclam)(2+) subunit, and is shown to be an interesting hybrid molecule with novel functions.