三价轻希土—PMBP—路易斯碱三元配合物的合成及其性质的研究

合成了1—苯基—3—甲基—4—苯甲酰基—吡唑啉酮—5(PMBP)和路易斯碱的三价轻希土三元配合物LnA_3·L(A=Pmbp~-;L=C_2H_5OH时,Ln=La、Pr、Sm、对Gd为GdA_3·(C_2H_5OH)_(0·25);L=Phen(邻菲罗啉)时,Ln=Pr-Gd,L=TBPO(三丁基氧化膦)时,Ln=La、Pr—Gd)。测定了它们的摩尔电导值、热谱、红外光谱、可见—紫外光谱、荧光光谱和质子核磁共振谱。观察到热稳定性次序为LnA_3·Phen>LnA_3·TBPO。从同类型配合物系列的热效应值、LnA_3·Phen型配合物的合成难易程度及其紫外最大吸收波长的移动可观察到镧系收缩现象。

STUDY ON SYNTHESIS AND CHARACTERIZATION ON TERNARY COORDINATION COMPOUNDS OF TRIVALENT LIGHTER RARE EARTHS-PMBP-LEWIS BASES

The ternary coordination compounds of trivalent lighter rare earths-PMBP-Lewis bases,LnA₃·L,have been synthesized,where PMBP=1-phenyl -3-methyl-4-benzoyl-pyrazolone-5 ; A=Pmbp ; when L=C₂H₅OH, Ln=La, Pr and Sm, for Gd is GdA 3(C₂H₅OH)_0.25; when L=Phen(1, 10 phenanthroline), Ln=Pr-Gd; when L - TBPO(tri-n-butylphos-phine oxide), Ln=La, Pr-Gd). The molar conductivities, thermogravi-metric curves, TR spectra, electronic spectra, fluorimetric spectra and proton NMR spectra of the obtained coordination compounds have been examined. The order of thermostability obtained by thermoanalysis is LnA₃·Phen>LnA₃·TBPO. The phenomenon of lanthanide contraction has been observed through the thermoeffect values for the same type of coordination compounds, degree of difficulty of synthesis and the shift of maximum absorption wave lengths of the LnA₃·Phen in UV spectra.