Citation: TONG Bi-Hai, LIU Yuan-Yuan, ZHANG Man, MEI Qun-Bo, HUA Zhong-Sheng, ZHANG Qiang-Feng. Synthesis and Properties of a Series of Ruthenium(Ⅱ) Complexes with 4,5-Diaza-9,9’-spirobifluorene Ligands[J]. Chinese Journal of Inorganic Chemistry, ;2014, 30(5): 1174-1178. doi: 10.11862/CJIC.2014.141
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Three ruthenium complexes, [Ru(bpy)2(SB)](PF6)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=1.8818(2) nm, b=1.9913(3) nm, c=2.4221(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. 0.0012, while [Ru(bpy)(SB)2](PF6)2 and [Ru(SB)3](PF6)2 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 Vto 1.58 V, and relative peak intensity decreased from 731 to 52.
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