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https://doi.org/10.1016/j.jssc.2014.09.006
Copy DOIJournal: Journal of Solid State Chemistry | Publication Date: Sep 16, 2014 |
Citations: 6 |
Three new metal–organic complexes Cu[Hbpdc]2 (1), [Ni(bpdc)(H2O)]·H2O (2) and [Ni(H2bpdc)(H2O)2]SO4 (3) (H2bpdc=2,2′-bipyridyl-5,5′-dicarboxylic acid) have been hydrothermally prepared and structurally characterized by elemental analyses, IR spectra, powder X-ray diffraction (PXRD) and single-crystal X-ray diffraction. 1 is a 3-D supramolecular architecture formed by hydrogen bonding interactions between carboxyl O atoms and strong face-to-face π⋯π stacking interactions between bipyridyl rings of Hbpdc− ligands, 2 exhibits an intriguing 2-D sheet constructed from [Ni(bpdc)(H2O)] units and 3 displays an infinite 1-D chain built by {[Ni(H2bpdc)(H2O)2]2+} fragments through SO42−. Moreover, thermogravimetric (TG) and derivative thermogravimetric (DTG) analyses of 3 have been conducted and the TG curve shows two-stage weight loss between 300 and 950K and the corresponding apparent activation energies are calculated by Ozawa–Flynn–Wall (OFW) method and Friedman method. The most probable kinetic model function of the dehydration reaction of 3 has been estimated by Coats–Redfern integral method and Achar–Bridly–Sharp differential method.
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