一系列Ru(Ⅱ)配合物电致化学发光性质的比较研究

A Comparative Study on Electrochemiluminescent Properties of a Series of Ruthenium(Ⅱ) Complexes

比较研究了以C2O42-为共反应物时5个结构相关的Ru(Ⅱ)配合物[Ru(bpy)2L1]2+,[Ru(bpy)2L2]2+,[Ru(bpy)2L3]2+,[Ru(phen)2L1]2+和[Ru(phen)2L2]2+(其中bpy=2,2′-联吡啶,phen=1,10-邻菲啰啉,L1=4-羧基苯基咪唑[4,5-f][1,10]邻菲啰啉,L2=3-羧基-4-羟基苯基咪唑[4,5-f][1,10]邻菲啰啉,L3=3,4-二羟基苯基咪唑[4,5-f][1,10]邻菲啰啉)的电致化学发光(ECL)性质.结果表明,酚羟基的存在能有效地淬灭Ru(Ⅱ)配合物[Ru(bpy)2L2]2+,[Ru(bpy)2L3]2+和[Ru(phen)2L2]2+的ECL,其它Ru(Ⅱ)配合物的ECL量子效率与[Ru(bpy)3]2+相差不大.

Electrochemiluminescent （ECL） properties of 5 structurally related Ru（Ⅱ） complexes of [Ru（bpy）2L^1]^2 ＋, [Ru（bpy）2L^2]^2 ＋, [Ru（bpy）2L^3]^2 ＋, [Ru（phen）2L^1]^2 ＋ and [Ru（phen）2L^2]^2 ＋ （where bpy = 2,2＇-bipyridine, phen = 1,10-phenanthroline, L^1 = 4-carboxylphenylimidado[4,5-f] [ 1,10]phenanthroline, L^2 = 3-carboxyl-4-hydroxylphenylimidado[4,5-f][1,10]phenanthroline, and L3= 3,4-dihydroxyphenylimidado- [4,5-f][1,10]phenanthroline） have been studied in CH3CN/H2O （V/V, 1 ： 1） by using oxalate as coreactant. The results indicated that the presence of hydroxyl in [Ru（bpy）2L^2]^2＋, [Ru（bpy）2L^3]^2＋and [Ru（phen）2L^2]^2＋ effectively quenches ECL, and the other complexes exhibit comparable ECL efficiencies to [Ru（bpy）3]^2＋.