论文部分内容阅读
设计并制备具不同官能团的钌(Ⅱ)邻菲啰啉配合物——[Ru(bpy)2(phen-NO2)](PF6)2(1),[Ru(bpy)2(phen-Br)](PF6)2(2),[Ru(bpy)2(phen-NH2)](PF6)2(3),[Ru(bpy)2(bphen)](PF6)2(4),其中,bpy为2,2’-联吡啶,phen-NO2为5-硝基-邻菲啰啉,phen-Br为5-溴-1,10-菲啰啉,phen-NH2为5-氨基-邻菲啰啉,bphen为4,7-二苯基-邻菲啰啉.借助核磁共振(NMR)、红外光谱(FTIR)、元素分析、紫外可见光谱(UV-vis)和荧光光谱法对其进行了分析与表征.结果表明:配合物2～4在蓝-紫色可见光区域有较强吸收、可发射出明亮的橙红色荧光、具荧光量子效率(Φ)高、激发态寿命(τ)长、Stocks位移值较大(147～180 nm)和优良的氧致荧光淬灭性能(Ksv≥3.5,(I0/I)max≥4.0)等光物理性质.其中,具接枝型官能团氨基的配合物3的量子效率(Φ)=10%,τ=381.8 ns,Ksv=3.49,(I0/I)max=4.33;而溴修饰的配合物2以高达18%的荧光量子效率、634.7 ns的激发态寿命、180 nm的Stocks位移和Ksv=4.59,氧淬灭参数(I0/I)max=5.29,使之最有希望成为接枝型、较高性能的光学氧传感器的候选氧敏指示剂.
The structures and structures of Ru (bpy) 2 (phen-NO2) (PF6) 2 (1), [Ru (bpy) 2 (PF6) 2 (2), [Ru (bpy) 2 (phen-NH2)] (PF6) 2 Is 2,2’-bipyridine, phen-NO2 is 5-nitro-phenanthroline, phen-Br is 5-bromo-1,10-phenanthroline and phen-NH2 is 5-amino-phenanthroline Bphen was 4,7-diphenyl-phenanthroline, which was analyzed by NMR, FTIR, elemental analysis, UV-vis and fluorescence spectroscopy The results show that complexes 2-4 have a strong absorption in the blue-violet visible region and emit bright orange-red fluorescence with high fluorescence quantum efficiency (Φ), long excited state lifetime (τ), and Stocks shift (147 ~ 180 nm) and excellent oxygen induced fluorescence quenching (Ksv≥3.5, (I0 / I) max≥4.0), among which, the complex 3 with the amino group of the grafted functional group The quantum efficiency (Φ) = 10%, τ = 381.8 ns, Ksv = 3.49, (I0 / I) max = 4.33, while the bromine-modified complex 2 has the fluorescence quantum efficiency up to 18%, the excited state lifetime of 634.7 ns, Stocks displacement at 180 nm and Ksv = 4.59, Quenched parameter (I0 / I) max = 5.29, so that the most promising candidate for optical oxygen sensors oxygen graft type high performance sensitive indicator.