Abstract
Two new coordination polymers {[Tb2(C4H4O5)3 · 4H2O] · 2H2O} n (1) and {[La2(C4H4O5)3 · 3H2O] · 3H2O} n (2) (C4H4O5 2− = diglycolato) were prepared by hydrothermal reaction and characterized by X-ray crystallography. The two complexes have different network structures through carboxylate oxygen atoms and ether oxygen atoms from diglycolato ligands linking lanthanide ions. The characteristic transition bands 5D4 → 7FJ (J = 6 − 3) of Tb(III) ion are observed in complex 1. Two new coordination polymers {[Tb2(C4H4O5)3 · 4H2O] · 2H2O} n (1) and {[La2(C4H4O5)3 · 3H2O] · 3H2O} n (2) (C4H4O5 2− = diglycolato) have network structures through the carboxylate oxygen atoms and ether oxygen atoms from diglycolato ligands. The emission spectrum of complex 1 indicates the 5D4 → 7FJ (J = 6 − 3) transitions of Tb(III) ion.
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