稀土元素的β-二酮配合物的质谱研究曾有文献报道,但大多数是含氟代的直链或杂环β-二酮稀土配合物。本文研究我们合成的1-苯基-3-甲基-4(β-苯甲酰基乙酰基)-吡唑酮-5(简称PMPEP=L)与镧、铕、铽配合物的质谱,此配体是由吡唑啉环上的羰基与支链上的两个羰基互为β位的三酮。本文首次报道此配体和镧、铕、铽三个元素配合物的质谱。 Mass spectrometry studies of rare earth element β-diketone complexes have been reported in the literature, but most of them are fluoro-containing linear or heterocyclic β-diketone rare earth complexes. In this paper, the mass spectrometry of the complexes of 1-phenyl-3-methyl-4 (β-benzoylacetyl) -pyrazolone-5 (abbreviated as PMPEP = L) with lanthanum, europium and terbium was studied. The body is a triketone which is a β-position to each other between a carbonyl group on the pyrazoline ring and two carbonyl groups on the branched chain. This article first reports the mass spectra of the ligands and lanthanum, europium, terbium complexes of three elements.