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金属铕(Ⅲ)与3,5-二羧基吡啶(pdc)形成配合物:[Eu(pdc)1.5(DMF)]·(DMF)0.5(H2O)0.5—(1a)。1a受热失去自由水和DMF后形成配合物(2a)—[Eu(pdc)1.5]。结构分析表明配合物2a拥有一维规整的大小为6.3×8.5的六边形孔道,并且未配位的吡啶N原子都朝向空腔,能够吸附亲N原子的过渡金属离子,从而改变原配合物的发光性能。通过对不同价态以及不同浓度金属离子对配合物2a的荧光调控性能分析,发现低浓度金属离子对配合物2a的发光强度起到敏化作用,高浓度金属离子则出现猝灭效应。另外,在10-5 mol/L相同浓度不同金属离子对配合物荧光性能影响中,Cu2+离子敏化效果最强,Fe3+离子的则最弱。
Eu (pdc) 1.5 (DMF)] (DMF) 0.5 (H2O) 0.5- (1a) was prepared by the complex reaction of europium (Ⅲ) with 3,5-dicarboxypyridine (pdc) 1a Lost free water and DMF to form complex (2a) - [Eu (pdc) 1.5]. The structural analysis shows that the complex 2a has a one-dimensional regular hexagonal pore of size 6.3 × 8.5 cm, and the uncoordinated pyridine N atoms are all oriented toward the cavity, which can adsorb the transition metal ions of the pro-N atoms to change the original coordination Luminous properties of matter. Through the analysis of the fluorescence regulation properties of the complexes 2a with different valences and different concentrations of metal ions, it was found that the low concentration of metal ions sensitized the luminescence intensity of the complex 2a and the quenching effect of the high concentration of metal ions. In addition, in the same concentration of 10-5 mol / L different metal ions on the fluorescence properties of complexes, Cu2 + ion sensitizing effect strongest, while the weakest Fe3 + ions.