Abstract：The ternary solid complexes RE(Et2dtc)3(phen) (RE=La, Pr, Nd, Sm-Er) were synthesized with sodium diethyldithiocarbamate (NaEt2dtc·3H2O), 1,10-phenanthroline (o-phen·H2O) and hydrated lanthanide chlorides in absolute ethanol by improved reported method. IR results revealed that RE3+ 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 RE3+ 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)3(phen) and Eu(Et2dtc)3(phen) have a higher efficiency of intermolecular energy transfer and a stronger fluorescence character.
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