resumo
Reactions of rare earth chlorides, N-(phosphonomethyl) iminodiacetic acid (H(4)pmida) and ferrous oxalate dihydrate under ionothermal conditions result in four new isostructural 3d-4f heterometal coordination polymers, [LnFe(III)Fe(6)(II)(Hpmida)(6)]center dot 2H(2)O {Ln = Eu (1), Dy (2), Ho (3) and Y (4)}. All compounds were characterized by infrared spectroscopy, elemental analysis, thermogravimetric analysis, and X-ray diffraction. The compounds feature a very interesting three dimensional (3-D) structure built up from a secondary building unit, [Fe-2(Hpmida)(2)](2-) and possess a new topology type and complicated unique tilings. The catalytic properties of compounds 1-4 were investigated showing that these types of compounds are heterogeneous catalysts in the Knoevenagel condensation with high selectivity.
palavras-chave
METAL-ORGANIC FRAMEWORKS; SLOW MAGNETIZATION RELAXATION; IONIC LIQUIDS; CHIRAL INDUCTION; 3D-4F CLUSTERS; COMPLEXES; LIGANDS; SERIES; CONDENSATION; MAGNETS
categoria
Chemistry
autores
Yang, TH; Silva, AR; Fu, LS; Shi, FN
nossos autores
Ana Rosa Silva
Investigador Principal
Fa-Nian Shi
Investigador
Lianshe Fu
Investigador Auxiliar
Tinghai Yang
Bolseiro de pós-DoutoramentoProjectos
agradecimentos
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 of 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 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).