摘要
合成了一种含吡唑啉酮的三脚架结构化合物 1,1,1 三 { 1′ [2′ 氧杂 5′ 氧代 5′ ( 1″ 苯基 3″ 甲基吡唑啉酮 4″ 基 )戊基 ] }丙烷 (H3 L)及其 7个稀土配合物。通过元素分析、摩尔电导、质谱、红外光谱、核磁共振谱、荧光光谱等对H3 L及其稀土配合物的组成及性质进行了表征。分析结果表明 :H3 L的分子式为C45H50 N6O9,配合物的组成比为REL·0 5H2 O (RE =La ,Sm ,Eu ,Gd ,Tb ,Dy ,Yb) ;该三脚架形配体分别以醚氧、烯醇氧及吡唑酮环上的羰基氧与稀土离子进行配位 ,形成内配型配合物。荧光光谱分析表明SmL·0 5H2 O ,EuL·0 5H2 O ,TbL·0 5H2 O ,DyL·0 5H2 O配合物具有三价稀土离子的特征线状荧光 ,其中TbL·0 5H2 O的荧光强度最强 ,表明T(配体 )→5D4(Tb)能级更为匹配 ,从而进行分子内能量有效传递 ;由EuL·0 5H2 O的荧光光谱图形推测 ,Eu3
A novel tripodal compounds containing pyrazolone 1,1,1-tri{1(-[2′-oxy-5′-oxo-5′-(1″-phenyl-3″-methyl-pyrazolone-4″-yl)pentyl]} (H_3L) and the its trivalent rare earth complexes REL·0.5H_2O (RE = La, Sm, Eu, Gd, Tb, Dy, Yb) were synthesized. Characterization were carried out by elemental analysis, 1H NMR, MS, IR, molar conductivity, fluorescence spectrometry and so on. The results indicated that the molecular formula of the ligand is C_ 45H_ 50N_6O_9, the rare earth complexes are 1∶1 non-electrolyte and their composition ratio is REL·0.5H_2O. The complexes containing Sm, Eu, Tb and Dy show fluorescence, in particularly, the fluorescence properties of TbL·0.5H_2O are the best. It is artributed to the efficient energy transfer between central rare earth ions and ligands. For Eu in complexe a non-centrosymmetric coordination environment can be deduced from the shape of EuL·0.5H_2O spectra.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2002年第5期474-477,共4页
Journal of the Chinese Society of Rare Earths
基金
国家自然科学基金资助项目 ( 2 95 710 3)
