Europium(III) and terbium(III) trans-2-butenoates: syntheses, crystal structures, and properties

B. BARJA; P. ARAMENDIA; R. BAGGIO; M.T. GARLAND; O. PEÑA; MIREILLE PEREC

INORGANICA CHIMICA ACTA

Año: 2003 vol. 355 p. 183 - 190

0020-1693

Homometallic europium(III) and terbium(III) trans-2-butenoate polymers, chemical formulas [{Eu3(MeCH/CHCO2)9(H2O)4}H2O/EtOH]n (1) and [{Tb(MeCHCHCO2)3(H2O)}/MeCH/CHCO2H]n (2) and their dimeric 1,10-phenanthroline derivatives [Ln2(MeCH/CHCO2)6(phen)2] 2H2O, with Ln=/Eu (3) and Tb (4), were prepared and characterized by single-crystal X-ray diffraction. The coordination polymers 1 and 2 adopt different carboxylate-bridged infinite chain structures. While the europium compound 1 shows three independent europium centers linked to each other by three different types and number of carboxylate bridges, the terbium polymer 2 shows one independent metal center bridged by the same type of double carboxylates along the chains. Compounds 3 and 4 are isomorphous dinuclear structures with quadruply bridged carboxylate groups, two in the h1:h1:m2 and two in the h2:h1:m2 modes. The magnetic and photophysical behaviors of the four compounds are reported in the solid state.