稀土配合物RE(Et_2dtc)_3(phen)的光谱性质

Spectra of Rare Earth Complexes RE(Et_2dtc)_3(phen)

以铜试剂(NaEt2dtc·3H2O)和邻菲咯啉(o-phen·H2O)与水合氯化稀土(RECl3·xH2O)(RE=La,Pr, Nd,Sm-Er;x=3-4)在无水乙醇中反应,制得三元固态配合物RE(Et2dtc)3(phen)。IR光谱研究表明配合 物中RE3+与NaEt2dtc中的硫原子和o-phen中的氮原子均双齿配位;UV光谱显示配合物中o-phen与稀土离 子之间的能量传递是主要过程,配合物的最大吸收与o-phen相比有微小的红移;FS光谱表明配合物Sm (Et2dtc)3(phen)和Eu(Et2dtc)3(phen)分子内能量传递效率高,显示了很强的荧光性质。

The ternary solid complexes RE（Etadtc）3 （phen） （RE= La, Pr, Nd, Sm-Er） were synthesized with sodium diethyldithiocarbamate （NaEt2 dtc·3H2O）, 1,10-phenanthroline （o-phen· H2 O） and hydrated lanthanide chlorides in absolute ethanol by improved reported method. IR results revealed that RE^3＋ coordinated with sulfur atoms of NaEt2dtc and nitrogen atoms of o-phen. As for UV spectrum of the complexes, energy transfer between o-phen and RE^3＋ was the primary process, and the main absorption peaks showed a slight red shift compared to that of o-phen; FS spectrum, as a comparison, showed that the complexes Sm（Et2dtc）s （phen） and Eu（Et2dtc）3 （phen） have a higher efficiency of intermolecular energy transfer and a stronger fluorescence character.