摘要

Two novel metal-organic coordination polymers [Zn(2)(PDC)(2)center dot H(2)O](n) (1) and [Zn(2)La(2)(OH)(NO(3))PDC)(4)(H(2)O)(6)center dot 2H(2)O](n) (2) (PDC=pyridine-2,3-dicarboxylic acid) have been synthesized by hydrothermal pretreatment and cooling-down crystallization. X-ray diffraction analyses reveal that they posses the 3D frameworks. Frame work 1 has been accomplished by using building blocks Zn-PDC with beautiful undulances. Frame work 2 is a new 3d-4f heterometallic polymer with a distinctive mono- and dinuclear mixed one sinusoidal-like wave viewed along the b axis.