科研之友
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摘要
The novel two-dimensional coordination polymers [Ln(5-nip)(5-Hnip)(H2O)(2)](H2O)(2) (Ln = Sm (1), Gd (2), Dy (3); 5-nipH(2) 5-nitroisophthalic acid) were prepared using hydrothermal methods. Their isomrphous structures were characterized by single-crystal X-ray diffraction analyses. Two-dimensional layer-like structures are constructed by lanthanide ions bridged by 5-nip(2-) ligands with the layers packing in 3D motifs through two kinds of pi-pi stacking interactions and hydrogen bonds. The complexes are thermally stable, aside from loss of water, to ca 350 degrees C.
