کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1406715 | 1501835 | 2010 | 9 صفحه PDF | دانلود رایگان |
Five lanthanide coordination compounds, [Ln3(bpdc)4(Hbpdc)(H2O)2]·12H2O (LnCe(1), Nd(2) and Pr(3)) and [Ln2(bpdc)3(H2O)3]·3H2O (LnEr(4) and Tm(5)) were obtained from 2,2′-bipyridine-6,6′-dicarboxylate acid and corresponding lanthanide salts by hydrothermal synthesis. Single-crystal X-ray diffraction reveals that 1–3 are isomorphous and isostructural, composed of one-dimensional infinite double zigzag chain structure, and further extended to two-dimensional networks via hydrogen bonds and π–π interactions; while isomorphous and isostructural 4–5 are zero-dimensional discrete moieties and further joined into three-dimensional framework by rich intermolecular hydrogen bonds and π–π interactions. The pyridyl nitrogen atoms and the carboxylate oxygen atoms of the bpdc ligand are coordinated to lanthanide ions, resulting into versatile coordination modes. Thermogravimetric analyses of 1–5 display a considerable thermal stability.
Journal: Journal of Molecular Structure - Volume 979, Issues 1–3, 27 August 2010, Pages 92–100