Investigation on Three New Metal Carboxydiphosphonates: Syntheses, Structures, Magnetic and Luminescent Properties
作者：Sifu Tang ;Xiao-Bo Pan, Xiao-Xia Lv, Xue-Bo Zhao*
關鍵字：Metal Carboxydiphosphonates
論文來源：期刊
具體來源：Journal of Solid State Chemistry, 197（2013），139-146,
發表時間：2013年
A new multifunctionalized phosphoric acid, (2-(diphosphonomethylamino)nicotinic acid, Py(COOH)(NHCH(PO3H2)2), H5L1), has been employed as ligand for the construction of new metal phosphonates. By reacting it with different metal chlorides under hydrothermal condition, three new transition metal phosphonates, namely, [Co2(HL1)(H2O)5][H2O]3 (1), Zn(H3L1) (2) and [Cd(H3L1)(H2O)2][H2O] (3) were successfully obtained. The single-crystal structure measurements indicated that the coordination mode of ligand H5L1 is metal-dependant and results in different structures. For compound 1, it features 2D layered structure. Whereas compounds 2 and 3 have 1D chain structures. Under the excitation of 250 nm light, both compounds 2 and 3 show intraligand and ligand to metal charge transfer (LMCT) emission bands at about 415 and 420 nm, respectively. Magnetic study shows that compound 1 displays antiferromagnetic behavior.