The β-diketone compounds are widely used as ligand in organic rare earth complexes. The matching degree between the lowest triplet energy level of ligand and the lowest excited state energy level of rare earth directly influences the fluorescence intensity of organic rare earth complexes. In order to improve the fluorescence intensity of organic rare earth complexes, the design and synthesis of new β-diketone become more and more important. In this paper, l-(6-acetyl-9-butyl-9H-carbazol-3-yl)-3-phen-yl-propane-l,3-diketone was gained by N-alkylation,acetylation and condensation reaction from carbazole as raw material. Target compound was characterized by mass spectrometry (1H-NMR), MS-ESI and Infrared Spectroscopy (IR). The ultraviolet absorption spectrum,thermo-gravimetric analysis and Differential Scanning Calorimeter were recorded. The results show that the compound is suitable to be used as ligand in the organic rare earth complexes.%β-二酮化合物被广泛应用于有机稀土配合物的配体,配体的最低三重态能级与稀土的最低激发态能级的匹配程度直接影响有机稀土配合物的荧光强度,为了提高有机稀土配合物的荧光强度,设计合成新的β-二酮化合物变的尤为重要.本文以咔唑为原料,经N-烷基化、乙酰化和缩合反应得到1-(6-乙酰基-9-正丁基-9H-咔唑基)-3-苯丙基-1,3-二酮.经氢核磁共振谱(1 H-NMR)、质谱(MS-ESI)和红外光谱(IR)确认,目标化合物结构正确,并测定了化合物的紫外吸收光谱、热重(TG)、示差扫描量热曲线(DSC),结果表明该化合物适合用于有机稀土配合物的配体.
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