系列含4,5-二氮杂-9,9′-螺二芴配体的钌配合物的合成及其性能研究(英文)

Synthesis and Properties of a Series of Ruthenium(Ⅱ) Complexes with 4,5-Diaza-9,9′-spirobifluorene Ligands

合成了3个钌髤配合物,[Ru(bpy)2(SB)](PF6)2、[Ru(bpy)(SB)2](PF6)2和[Ru(SB)3](PF6)2(bpy=2,2′-bipyridine,SB=4,5-diaza-9,9′-spirobifluorene),通过核磁和元素分析对配合物的结构进行了确定。[Ru(bpy)2(SB)](PF6)2通过X射线单晶衍射确认了结构。研究了配合物的光物理性能。结果表明[Ru(bpy)2(SB)](PF6)2在乙腈中的发桔红光,波长为606 nm,量子产率约为0.001 2。在同样条件下[Ru(bpy)(SB)2](PF6)2和[Ru(SB)3](PF6)2的发光非常微弱甚至几乎没有发光。还研究了这些配合物的电致化学发光性能。随着配体中SB含量的增加,发光的峰电压从1.36 V增加到1.58 V,相对发光强度从731降低到52。

Three ruthenium complexes, [Ru（bpy）2（SB）l（PV6）2, [Ru（bpy）（SB）2]（PF6）2 and [Ru（SB）3]（PF6）2 （bpy=2,2＇- bipyridine, SB=4,5-diaza-9,9＇-spirobifluorene）, have been synthesized and characterized. [Ru（bpy）2（SB）]（PF6）2 has also been characterized by single-crystal X-ray diffraction. Its crystal belongs to orthorhombic system with Pbca space group, in which a=1.881 8（2） rim, b=1.991 3（3） nm, c=2.422 1（3） nm, Z=8. The photophysical properties of these complexes were investigated. [Ru （bpy）2 （SB）]（PF6）2 shows orange red emission at around 606 nm with a phosphorescence quantum yield of ca, 0.001 2, while [Ru（bpy）（SB）2I（PF6）2 and [Ru（SB）3]（PF6）z shows rather weak or almolst no emissiom at the same condition. The electrochemiluminescence performance of these complexes has also be studied. With the increase of SB ligand concentration, the peak potential increased from 1.36 V to 1.58 V, and relative peak intensity decreased from 731 to 52. CCDC;948328.