A series of transition metal-organic frameworks based on a bipyridinium carboxylate ligand: Syntheses, structures and photoluminescent properties

作者：Pei, Ru-Bo; Cao, Ming-Yang; Li, Lin-Ke^*; Dong, Xi-Yan^*; Zang, Shuang-Quan

来源：Journal of Molecular Structure, 2017, 1143: 72-83.

DOI：10.1016/j.molstruc.2017.04.075

• Bipyridinium carboxylate ligand
• Coordination polymers
• Structure
• Topology
• Photoluminescent properties

Based on a bipyridinium carboxylate ligand 1-(3,5-dicarboxy)-benzyl-1,2-di(pyridine-4-yl)ethylene chloride (H2L+Cl-), eight transition metal coordination polymers, namely, ([Zn(L)Cl]center dot 4H(2)O}(n) (1), {[Zn(L) H2O]center dot NO3 center dot 2H(2)O}(n) (2), ([Zn(L) (H2O)]center dot(NO3)(0.5)center dot(Cl)(0.5 center dot)2H(2)O}(n) (3), ([Cd(L)(H2O)(NO3)]center dot 2H(2)O}(n) (4), {[Cd-1.5(L) (Cl)(2)]center dot 2H(2)O}(n) (5), {[Cu(L)(H2O)]center dot NO3 center dot H2O}(n) (6), {[Cu(HL)(2)(H2O)(2)]center dot Cl-2 center dot 6H(2)O}(n) (7) and {[Ni(L)(H2O)Cl]center dot 4H(2)O}(n) (8) have been synthesized and characterized by single-crystal X-ray diffraction analyses. Complexes 1 and 8 display 2D wave-like layer structures with a 3-connected 6(3) topology. Complexes 2 and 6 demonstrate 3D 2-fold interpenetrating frameworks with uninodal, 3-connected (10,3)-d utp-topology. Another pair of 3D 2-fold interpenetrating frameworks 3 and 4 possess 3-connected, uninodal 10(3) ThSi2 (ths)-topology. Complex 5 shows a 2D layer structure based on the extending of trinuclear Cd(II) subunits. Complex 7 presents 1D double-chain structure, in which the central Cu(II) ions are connected by the partially deprotonated ligand HL. Additionally, powder X-ray diffractions (PXRD) and thermogravimetric analyses of complexes 1-8, as well as the solid-state luminescent properties of d(10) metal complexes 1-4 at room temperature have also been discussed.

• 出版日期2017-9-5
• 单位郑州大学; 河南理工大学