Abstract
Two polyoxometalate-templated nickel-Schiff-base compounds, {[Ni(L)2]2[PMo12O40][Cl] · 1.5DMF · H2O} n (1) and {[Ni(L)2]2[PMo12O40][Cl] · DMSO · CH3OH · 0.5H2O} n (2) (where L is 1,4-bis(4-imidazolyl)-2,3-diaza-1,3-butadiene), were synthesized in situ from Ni2+ and L in H2O/DMF/CH3OH or H2O/DMSO/CH3OH at room temperature and characterized by elemental analysis, infrared spectroscopy, and single-crystal X-ray diffraction analysis. The results of the single-crystal X-ray diffractions suggested that both compounds have the same packing of the Ni(II)-Schiff-base cation layer and Keggin anion layer. Thermogravimetric analyses suggested that two supramolecular compounds have similar thermal stabilities based on the same packing of the cation and anion layers.
Acknowledgments
This study is supported by the National Natural Science Foundation of China (grant no. 20971038) and the Natural Science Foundation of the Education Department of Henan Province (no. 2009A 150015).