稀土配合物的研究(Ⅴ)——稀土元素与-4-酰代双吡唑啉酮BPMPHD及α,α-联吡啶三元配合物的合成和性质

Studies on the Rare Earth Coordination Compounds (Ⅴ) ——Preparation and Properties of the Solid Complexes of Rare Earth with 4-Acetyl-bis-Pyrazolone BPMPHD and a,a-Dipyridyl

合成了14种稀土元素(R)与1,6-双(1′-苯基-3′-甲基-5′-吡唑啉酮-4′)-1,6-己二酮(BPMPHD,H_2L)和α,α-联吡啶(DPy,D)形成的新三元混配配合物R_2L_3D_2·~nH_2O(R=La,Y,n=10;R=Sm,…,Lu;n=4)及R_2L_3D·4H_2O(R=Pr,Nd),研究了配合物的红外、紫外-可见光谱、差热-热重、荧光等性质。配合物分解温度具有“四分组”效应及“双峰”性质。Nd、Ho、Er配合物有超灵敏跃迁。Sm、Eu、Tb、Dy和Tm具有线状荧光,Tb配合物荧光量子效率为0.124。

In this paper, fourteen new solid complexes of rare earth with 1,6-bis-(1'-phenyl-3'-methyl-5' -pyrazolone-4')-1 ,6-hexanedione (BPMPHD, H2L) and a,a-dipyridyl(DPy, D) have been synthesized and characterized. The stoi-chiometry of the complexes was confirmed by elemental analysis, R2L3D2.nH2O (R=La,Y5 w = 10;R=Sm, ...,Lu5 n=4), R2L3D.4H2O(R=Pr, Nd). Determinations and discussions have been made for the 1R, UV-visible spectra,fluorescence spectra and DTA-TG spectra of these complexes. The decomposition temperature of the coordination compounds has the 'tetra effect' and 'double peaks'. The hypersensitive transition of Nd, Ho, Er complexes and the fluorescence of the Sm, Eu, Tb, Dy, Tm and La, Lu, Y, Gd complexes have been attributed. The flourescence quantum yield of Tb complex was measured also.