Two-dimensional carboxylate bridged network of europium(III)-transition metal(II) glutarate compounds |
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Authors: | Kim Yoojin Park Yunju Jung Duk-Young |
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Institution: | Department of Chemistry-BK21 and the Institute of Basic Sciences, Sungkyunkwan University, Suwon 440-746, Korea. |
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Abstract: | Four new heterometallic glutarate coordination polymers, Eu2M(H2O)4]O2C(CH2)3CO2]4.2H2O (M = Mn (1), Fe (2), Co (3) and Ni (4)) have been obtained under hydrothermal synthesis. The single-crystal X-ray diffraction analyses showed that they have two-dimensional frameworks based on the linear polyhedral chains consisting of two nine-coordinated Eu(III)O9 and a six-coordinated M(II)O6. These 1-D MO6-Eu2O16 chains are cross-linked by glutarate ligands as an interchain pillared architecture, whose conformations vary depending upon the transition metals. The magnetic behavior of the compounds show a weak antiferromagnetic interaction, in which shielding of the 4f electrons by the outer shell electrons effectively precludes significant coupling interactions between the Eu-4f electrons and transition metal (M)-3d electrons. |
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