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稀土与β－二酮类的配合物在新型发光材料，免疫试剂等方面已有广泛的研究及应用［１，２］。β－二酮与稀土离子配位后增大了共轭体系，能提高配合物的分子内能量传递量子产率，从而可以得到高效荧光材料，日益受到人们重视。目前对β－二酮类稀土荧光配合物研究得较多的主要有２，２′－联吡啶（ｂｉｐｙ）、邻菲?啉（ｐｈｅｎ）或其氧化产物ｐｈｅｎＯ２、ｐｈｅｎＮＯ 等的三元配合物［３～５］。为了开拓新的荧光体系，一些新型中性协同配体引起了人们的重视［６］。我们首次合成了以２－（２－吡啶）苯并咪唑（Ｈｐｂｉ）为配体的三元稀土β－二酮（苯甲酰丙酮，Ｈｂｚａ、噻吩甲酰三氟丙酮，ＨＴＴＡ）配合物，用元素分析、红外（ＩＲ）、核磁（ＮＭＲ）等手段对配合物进行了表征，并比较了Ｈ２Ｏ、ｂｉｐｙ、Ｈｐｂｉ以及ｐｂｉ－ 负离子对光谱性质的影响。Ｈｐｂｉ ＮＨＮ
Rare earth and β-diketone complexes in the new luminescent materials, immunological reagents, etc. has been widely studied and applied [1,2]. The coordination system of β-diketone with rare earth ions increases the conjugated system, which can increase the intramolecular energy transfer quantum yield of the complex, so that an efficient fluorescent material can be obtained, which attracts more and more attention. At present, there are mainly three kinds of ternary complexes of 2,2’-dipyridyl, phenanthroline (phen) or its oxidation products such as phenO2 and phenNO, 3 ~ 5]. In order to develop new fluorescent systems, some new neutral coordination ligands have attracted people’s attention [6]. We first synthesized ternary rare earth β-diketone (benzoylacetone, Hbza, thenoyl trifluoroacetone, HTTA) complex with 2- (2-pyridyl) benzimidazole (Hpbi) The complex was characterized by elemental analysis, IR and NMR. The effects of H2O, bipy, Hpbi and pbi-anion on the spectral properties were also compared. Hpbi NHN