abstract
Reactions of pyridine-2,3-dicarboxylic acid (pydcH(2)), cobalt acetate and lanthanide nitrate under hydrothermal conditions result in four new 3d-4f heterometallic coordination polymers, namely,[LnCo(pydc)(3)(H2O)(3)]center dot 9H(2)O {Ln = Dy (1), Ho (2), Er (3) and Tm (4)}. All compounds were characterized by elemental analysis, IR spectroscopy, SEM, EDS, thermal gravimetric analysis and X-ray diffraction. The compounds feature a two dimensional (2-D) layer structure with large apertures, in which each pydc2-ligand links two metal centers and each metal center is bonded to three pydc(2-) and vice versa. The adsorption and catalytic properties of compound 1 were investigated.
keywords
METAL-ORGANIC FRAMEWORKS; SINGLE-MOLECULE MAGNET; HYDROTHERMAL SYNTHESIS; COMPLEXES; LIGAND; ADSORPTION; PHOTOLUMINESCENCE; CLUSTER; FAMILY; OXIDE
subject category
Chemistry; Crystallography
authors
Yang, TH; Silva, AR; Shi, FN
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acknowledgements
We thank Fundacao para a Ciencia e a Tecnologia (FCT), FEDER, QREN, COMPETE (PEst-C/CTM/LA0011/2013) and FCT (SFRH/BPD/74582/2010) for financial support. F.-N. Shi acknowledges FCT for the project PTDC/CTM-NAN/119994/2010. T.-H. Yang acknowledges the NSF of Jiangsu Province (BK20140244), the project sponsored by the Scientific Research Foundation for Returned Overseas Chinese Scholars of the State Education Ministry, the NSF for Universities in Jiangsu Province (13KJB150013), the Science and Technology Bureau of Changzhou City (no. CJ20140031) and Jiangsu University of Technology (KYY13035). We also thank Dr. Song-Song Bao (College of Chemistry and Chemical Engineering at Nanjing University of China) for his help in refining PXRD data.