Lanthanide coordination polymers constructed from the asymmetrical N-heterocyclic rigid carboxylate: Synthesis, crystal structures, luminescence properties and magnetic properties.

Graphical abstract Three new series of lanthanide coordination polymers [LnL 2 (H 2 O) 4 ] n ·nNO 3 (Ln = Eu (1), Tb (2), Sm (3), Gd (4), Dy (5), Ho (6), Nd (7)), [LnL 2 (H 2 O) 4 ] n ·nCl (Ln = Yb (8), Er (9)) and [LnL(H 2 O) 2 (NO 3) 2 ] n (Ln = Sm (10), Nd (11)) assembled through an asymmetrical N-heterocyclic rigid carboxylate ligand (HL) were solvothermally constructed. A series of doped [Eu x Tb (1-x) L 2 (H 2 O) 4 ] n ·nNO 3 compounds with different doping molar ratios were also prepared. And the Eu(III)/Tb(III) molar ratio and the excitation wavelengh ([Eu(III)/Tb(III) = 2:3, 340 nm) were determined to gain the nearly white light emission. Meanwhile, compound 2 -Tb shows the high selectivity and sensitivity for Fe3+ cation via a luminescence quenching effect. In addition, the magnetic properties of 4 -Gd, 5 -Dy, 6 -Ho, 8 -Yb, 9 -Er were also measured. Abstract Three new series of lanthanide coordination polymers [LnL 2 (H 2 O) 4 ] n ·nNO 3 (Ln = Eu (1), Tb (2), Sm (3), Gd (4), Dy (5), Ho (6), Nd (7)), [LnL 2 (H 2 O) 4 ] n ·nCl (Ln = Yb (8), Er (9), and [LnL(H 2 O) 2 (NO 3) 2 ] n (Ln = Sm (10), Nd (11)) assembled through an asymmetrical N-heterocyclic rigid carboxylate ligand (HL) were solvothermally constructed. Compounds 1 – 7 , 8 , 9 and 10 , 11 display three diverse series of isomorphic 1D chain structures. Furthermore, the thermal stabilities and photoluminescence properties of these compounds were also studied. Based on a view that the emissions of 1 -Eu and 2 -Tb are composed of the three primary colors and they are isostructural, we prepared a series of doped [Eu x Tb (1-x) L 2 (H 2 O) 4 ] n ·nNO 3 compounds with different doping molar ratios. And the Eu(III)/Tb(III) molar ratio and the excitation wavelengh ([Eu(III)/Tb(III)] = 2:3, 340 nm) were determined to gain the nearly white light emission. Meanwhile, the magnetic properties of 4 -Gd, 5 -Dy, 6 -Ho, 8 -Yb, 9 -Er were also measured. [ABSTRACT FROM AUTHOR]