کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1407928 | 1501901 | 2007 | 6 صفحه PDF | دانلود رایگان |
Two new Cu(II) coordination polymers with double betaine ligands have been prepared, and their structures have been characterized by single-crystal X-ray diffraction techniques. The structure of [Cu(L1)2](ClO4)2·2H2O 1 (L1 = 1,3-bis(pyridinio-4-carboxylato)-propane) contains 1-D cationic chains, in which the adjacent Cu(II) atoms are doubly bridged by L1 ligands in the syn-syn bis-monodentate mode. In [Cu(L2)2](ClO4)2·4H2O 2 (L2 = 1,4-bis(pyridinio-4-carboxylato)-1,4-dimenthylbenzene), the Cu(II) atoms are joined by the L2 ligands in the same coordination mode as 1 in two directions to form a 2-D grid-like framework. The crystal packing in 1 and 2 is controlled mainly by face-to-face π–π stacking interactions between pyridine rings. The thermal stability of 1 has also been investigated.
Journal: Journal of Molecular Structure - Volume 837, Issues 1–3, 30 June 2007, Pages 231–236