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以二氧六环为溶剂 ,在 pH约为 7的条件下 ,分别以n (Dy3+ )∶n (BDPPPD) =2∶3和n (Dy3+ )∶n(BDPPPD)∶n(Phen ) =2∶3∶2的量比 (Phen为邻菲罗啉 ) ,合成了Dy(Ⅲ)的 1,5 双 (1′,3′ 二苯基 5′ 氧代吡唑 4′ 基 ) 1,5 戊二酮 (BDPPPD)的二元配合物Dy2 (BDPPPD) 3·6H2 O和三元配合物Dy2(BDPPPD) 3(Phen) 2 ·2H2 O ,收率为 91 2 %和 89 6 %。通过化学分析、元素分析和热分析确定了配合物的组成 ,通过FT -IR谱对配合物进行了表征。测定了配合物的荧光光谱 ,配合物的荧光发射峰位于 481和 5 76nm附近 ,分别相应于Dy3+ 的 4 F9/2 → 6H15/2 和 4 F9/2 → 6H13/2 跃迁 ,说明配合物发射Dy(Ⅲ)的特征荧光。第二配体Phen具有荧光增强作用 ,三元配合物Dy2 (BDPPPD) 3(Phen) 2 ·2H2 O最大发射峰 (5 76nm)的荧光强度是二元配合物Dy2 (BDPPPD) 3·6H2 O的 1 6 8倍。配合物具有较强荧光 ,说明BDPPPD的三重态能级与Dy3+ 最低激发态 (4 F9/2 )能级具有良好匹配 ,且其吸光系数较高 ,BDPPPD是Dy(Ⅲ)发光配合物的适宜配体
Using dioxane as the solvent and n (Dy3 +): n (BDPPPD) = 2: 3 and n (Dy3 +): n 3: 2 (1 ’, 3’ diphenyl 5 ’oxopyrazole 4’) 1,5-pentane di The binary complexes Dy2 (BDPPPD) 3 · 6H2O and BDPPPD 3 (Phen) 2 · 2H 2 O were obtained in yields of 91 2% and 89 6%, respectively. The composition of the complex was confirmed by chemical analysis, elemental analysis and thermal analysis. The complex was characterized by FT-IR spectroscopy. The fluorescence spectra of the complexes were measured. The fluorescence emission peaks of the complexes are located near 481 and 576 nm, corresponding to the 4 F9 / 2 → 6H15 / 2 and 4 F9 / 2 → 6H13 / 2 transitions of Dy3 +, respectively. (III) characteristic fluorescence. The fluorescence intensity of the second ligand, Phen, was increased. The fluorescence intensity of the ternary complex Dy2 (BDPPPD) 3 (Phen) 2 · 2H2O with the maximum emission peak (576nm) was the binary complex Dy2 (BDPPPD) 3.6H2O 1 6 8 times. The complex has a strong fluorescence, indicating that the BDPPPD triplet energy level and Dy3 + lowest excited state (4 F9 / 2) level has a good match, and its higher extinction coefficient, BDPPPD Dy (Ⅲ) luminescent complexes suitable body