Abstract
Physicochemical properties of new isostructural homo- and heteronuclear coordination polymers of terbium and europium with 1,4-bis-(4-methoxycarbonyl-3-hydroxyphenoxycarbonyl)butane (H2L) differing in the composition have been studied. The Tb2L3·H2O compound has exhibited efficient sensibilized green luminescence, whereas the corresponding europium-containing polymer EuL3·H2O has shown practically no luminescence due to mismatch of energies of the ligand triplet level and the Eu3+ ion emitting level. Heteronuclear terbium-europium polymers (Tb1.5Eu0.5L3·H2O, TbEuL3·H2O, and Tb0.5Eu1.5L3·H2O) show luminescence via the intramolecular transfer of the exiting energy from Tb3+ emitting level to Eu3+.
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