Six new 3d-4f heterometallic coordination polymers constructed from pyrazole-bridged Cu(II)Ln(III) dinuclear units

resumo

Reactions of lanthanide chlorides, copper hydroxycarbonate and 3,5-pyrazole dicarboxylic acid (H(3)pdc) under hydrothermal conditions result in six new 3d-4f heterometallic coordination polymers with two types of structures. Compounds [CuLn(2)(pdc)(2)(Hpdc)(H2O)(4)]center dot 2H(2)O (Ln = Tb (1), Dy (2), Er (3), and Y (4) exhibit a layered porous structure, made up of Cu(II)Ln(III) di-nuclear units which are connected by protonated Hpdc(2-) ligand, while the others [Cu(3)Ln(4)(pdc)(6)(H2O)(8)] (Ln = Eu (5), Gd (6)) display a three-dimensional (3-D) framework structure, in which six Cu(II)Ln(III) di-nuclear units are cross-linked by two coordinated lanthanide atoms. The catalytic properties of 3 are investigated showing its activity and recyclability in the reaction of cyclopropanation of styrene.

palavras-chave

METAL-ORGANIC FRAMEWORKS; SINGLE-MOLECULE MAGNET; INORGANIC SUBNETWORK; COMPLEXES; LIGAND; CLUSTERS; LN; RELAXATION; CATALYSIS; SULFATE

categoria

Chemistry

autores

Yang, TH; Silva, AR; Shi, FN

nossos autores

Grupos

agradecimentos

We thank Fundacao para a Ciencia e a Tecnologia (FCT), FEDER, QREN, COMPETE (PEst-C/CTM/LA0011/2011), and grant SFRH/BPD/74582/2010. F.-N. Shi and Ana acknowledge FCT for Ciencia 2007 and 2008 programs and the project PTDC/CTM-NAN/119994/2010.

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