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采用Claisen缩合反应设计合成了β-二酮配体1-(4-溴苯)-4,4,4-三氟丁烷-1,3-二酮(BPT),并合成了相应的新型稀土Eu,Tb(Ⅲ)三元配合物。通过元素分析、1H NMR谱、红外光谱、紫外光谱、荧光光谱和磷光光谱技术对合成的产物进行了表征和分析。红外光谱分析表明:BPT中存在着酮式-烯醇式互变;配合物中的稀土离子与BPT中的氧原子以及Phen中的氮原子形成了配位键。紫外光谱表明配合物主要是由第一配体BPT吸收能量。荧光光谱显示Eu(BPT)3Phen的发光强度较大,进一步的研究表明,BPT的最低三重态能级与Eu3+的5D0能级匹配较好。
The β-diketone ligand 1- (4-bromobenzene) -4,4,4-trifluorobutane-1,3-dione (BPT) was synthesized by Claisen condensation reaction and the corresponding novel rare earth Eu, Tb (Ⅲ) ternary complex. The synthesized products were characterized and analyzed by elemental analysis, 1H NMR, IR, UV, fluorescence and phosphorescence spectroscopy. Infrared spectrum analysis shows that there is a keto-enol interconversion in BPT. The rare earth ions in the complex form a coordination bond with oxygen atoms in BPT and nitrogen in Phen. UV spectroscopy showed that the complex is mainly absorbed by the first ligand BPT energy. Fluorescence spectra showed that the emission intensity of Eu (BPT) 3Phen was larger, and further studies showed that the lowest triplet energy level of BPT matches the 5D0 energy level of Eu3 +.