The novel one-dimensional chain of europium(III) complex [Eu2(BTA)6(4,40-bpdo)]n containing dimers bridged by terminal oxygen atoms of 4,40-bpdo molecules

A new europium ternary complex [Eu2(BTA)6(4,40-bpdo)]n (HBTAZbenzoyltrifluoroacetone, 4,40-bpdoZ4,40-bipyridine dioxide) is prepared. Crystal analysis shows that it possesses infinite one-dimensional linear chains containing binuclear coordination moieties Eu2(BTA)6(4,40-bpdo) in which two Eu(III) ions were bridged by two terminal oxygen atoms from two different 4,40-bpdo molecules. There are two crystallographically distinct Eu2(BTA)6(4,40-bpdo) units, in which all Eu(III) ions are in the similar EuO8 environments but with different symmetries and twisting angles between pyridine rings. The inter-chain p–p stacking interactions between neighboring phenyl rings in Eu2 chains extend the 1D coordination chains to construct a novel 2D supramolecular architecture, which further stabilizes this structure. q 2004 Elsevier B.V. All rights reserved