CAJ | 학술논문

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, NO2 C6 H4 COO=对硝基苯甲酸根, N( CH2 COO)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.
채용수열방법합성료4충 Sm3+배합물,즉{[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)화{[SmN(CH2COO)3(H2O)2]·H2O}n(4)[2,5-pdc=2,5-필정이최산근, tp=대분이갑산근, C6H5COO=분갑산근, Imh=미서, NO2 C6 H4 COO=대초기분갑산근, N( CH2 COO)3=안삼을산근].통과단정X사선연사학정료기정체결구.재실온하측정료기홍외광보、자외-가견-근홍외광보이급재근홍외구화가견구적발사광보.결과표명,4충배합물재근홍외구혹가견구균출현Sm3+리자적특정발사.저시형성배합물후, Zn-배체부분화배체대Sm3+리자발광적민화작용소치.차외,토론료불동유궤배체혹d과도금속리자대Sm3+리자발광적영향,병분석료배합물중Sm3+리자적근홍외발사대위이、벽렬화가관적원인.
Four new Sm3+ coordination complexes, {[SmZn(2,5-pdc)2(tpha)0.5(H2O)]·2H2O}n(1), [Sm2Zn2(C6H5 COO)10(Imh)2(H2O)2] (2), {[Sm2(NO2C6H4COO)6(H2O)4] ·H2O}n(3) and{[SmN(CH2COO)3(H2O)2]·H2O}n(4) [ 2, 5-pdc = pyridine-2, 5-dicarboxylate, tp = p-phthalate, C6 H5 COO=benzoate, Imh=imidazole, NO2 C6 H4 COO=p-nitrobenzoate, N ( CH2 COO ) 3=nitrilotriacetate ] , were synthesized by hydrothermal method. Their structures were determined by single-crystal X-ray diffraction. At room temperature, the IR, UV-Vis-NIR and emission spectra of the four complexes were measured and ana-lyzed. The four complexes exhibit the characteristic emission bands of the Sm3+ ion in the visible or NIR region, which should be attributed to the sensitization from the Zn-ligand( d-block) and ligands after forming coordination complexes. In addition, the sensitization from different ligands and d-block to Sm3+ ion was dis-cussed, the shift, split and broad of the NIR emission bands were analyzed.