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采用水热方法合成了4种Sm3+配合物,即{[SmZn(2,5-pdc)2(tp)0.5(H2O)]·2H2O}n(1),[Sm2Zn2(C6H5COO)10(Imh)2(H2O)2](2),{[Sm2(NO2C6H4COO)6(H2O)4]·H2O}n(3)和{[SmN(CH2COO)3(H2O)2]·H2O}n(4)[2,5-pdc=2,5-吡啶二羧酸根,tp=对苯二甲酸根,C6H5COO=苯甲酸根,Imh=咪唑,NO2C6H4COO=对硝基苯甲酸根,N(CH2COO)3=氨三乙酸根].通过单晶X射线衍射确定了其晶体结构.在室温下测定了其红外光谱、紫外-可见-近红外光谱以及在近红外区和可见区的发射光谱.结果表明,4种配合物在近红外区或可见区均出现Sm3+离子的特征发射.这是形成配合物后,Zn-配体部分和配体对Sm3+离子发光的敏化作用所致.此外,讨论了不同有机配体或d过渡金属离子对Sm3+离子发光的影响,并分析了配合物中Sm3+离子的近红外发射带位移、劈裂和加宽的原因.
Four kinds of Sm3 + complexes were synthesized by hydrothermal method, namely {[SmZn (2,5-pdc) 2 (tp) 0.5 (H2O)] · 2H2O} n (1), [Sm2Zn2 (C6H5COO) 10 (2), {[Sm2 (NO2C6H4COO) 6 (H2O) 4] · H2O} n (3) and {[SmN (CH2COO) 3 , 5-pdc = 2,5-pyridinedicarboxylate, tp = terephthalate, C6H5COO = benzoate, Imh = imidazole, NO2C6H4COO = pnitrobenzoate, N (CH2COO) 3 = nitrilotriacetic acid Root] .The crystal structure was confirmed by single crystal X-ray diffraction.The infrared spectra, UV-Vis-NIR spectra and the emission spectra in the near infrared region and visible region were measured at room temperature.The results showed that the four complexes The characteristic emission of Sm3 + ions appears in the near infrared region or in the visible region, which is caused by the sensitization effect of the Zn-ligand moiety and the ligand to the luminescence of Sm3 + ions after the formation of the complex. In addition, different organic ligands or d transition metal ions on the Sm3 + ion luminescence, and analysis of the Sm3 + ions in the near-infrared emission band displacement, splitting and broadening reasons.