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Inicio » Actividades I+D > Publicaciones 2003 > Europium(III) and Terbium(III) trans-2-b...
artículo con referato
"Europium(III) and Terbium(III) trans-2-butenoates: Synthese, Cristal Structure, and Properties"
B. Barja, P.F. Aramendia, R.F. Baggio, M.T. Garland, O. Peña and M. Perec
Inorg. Chim. Acta 355 (2003) 183-190
Homometallic europium(III) and terbium(III) trans-2-butenoate polymers, chemical formulas [{Eu3(MeCH=CHCO2)9(H2O)4}·H2O·EtOH]n (1) and [{Tb(MeCH=CHCO2)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 η1:η1:μ2 and two in the η2:η1:μ2 modes. The magnetic and photophysical behaviors of the four compounds are reported in the solid state.
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