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以水杨醛型希夫碱N,N′-双(5-溴-3-甲氧基-水杨醛)-1,3-乙三胺(H2L)为配体,合成了3个3d-Yb配合物[ZnYbL(NO3)2(OAc)](1),[Zn4Yb2L4(1,4-BDC)2]·[Yb(NO3)5(H2O)](2)和[CuYbL(NO3)2(OAc)(CH3OH)](3).六核配合物2是由二核配合物1和对苯二甲酸(1,4-BDC)反应而成,晶体结构表明,桥联配体对苯二甲酸将2个三核Zn2Yb单元连结起来,构筑了含更多金属核数的配合物2.荧光性质研究表明,在配合物1和2中,由Zn/L组成的发色基团对Yb3+离子的近红外发光有敏化作用,配合物2的稀土荧光发射略强于配合物1.在配合物3中,Cu2+离子的存在对稀土荧光具有淬灭作用.
Three salicylaldehyde Schiff bases N, N’-bis (5-bromo-3-methoxy-salicylaldehyde) -1,3-ethanediamine (H2L) Yb (NO3) 2 (OAc)] (1), [Zn4Yb2L4 (1,4-BDC) 2] [Yb (NO3) 5 (H2O)], and [CuYbL (NO3) 2 OAc) (CH3OH)] (3). The hexanuclear complex 2 is formed by the reaction of dinuclear complex 1 and terephthalic acid (1,4-BDC). The crystal structure shows that the bridging ligand terephthalic acid The two trinuclear Zn2Yb units were linked together to form a complex containing more metal nuclei.2 Fluorescence Studies showed that in complexes 1 and 2, the chromogenic group consisting of Zn / L had a significant effect on the Yb3 + Near-infrared luminescence sensitization, the rare earth fluorescence emission of complex 2 is slightly stronger than that of complex 1. In complex 3, the presence of Cu2 + ions has a quenching effect on rare earth fluorescence.