Syntheses,Structures And Properties Of Metal-Organic Framework Complexes Based On N,N'-Bis(3-pyridyl) Benzenedicarboxamides

The combine of N-containing ligands with semi-rigid bis-pyridyl-bis-amide ligands and aromatic carboxylates is a novel and efficient way to construct metal-organic frameworks(MOFs)complexs.In this paper,we choose N,N,-bis(3-pyridyl)-1,3-benzenedicarboxamide(BPBD1)and N,N,-bis(3-pyridyl)-1,4-benzenedicarboxamide(BPBD2)as the N-containing ligands and tetrakis(4-carboxyphenyl)silane(H4TCPS)as a silicon-based rigid letrahedron polyoxometalate-containing auxiliary ligand to act with different transition metal ions[Fe(?),Co(?),Ni(?),Mn(?),Zn(?)and Cd(?)]by adopting solution method leading to the formation of twelve metal-organic coordination polymers.The preparation methods and structural characteristics of these new coordination polymers are described and some related properties are preliminarily studied.The suactates of the tweive compounds were detemined by Xiay single crystal diffraction.Meanwhile,the physical characterization tests of powder X-ray diffraction and IR were also carried out.The fluorescence properties of Zn(?)and Cd(?)MOFs materials were studied.The electrochemical catalytic properties of Co(?)and Ni(?)MOFs materials were investigated.1.N,N'-bis(3-pyrndyl)-1,3-benzenedicarboxamide and tetrakis(4-carboxyphenyl)silane reacted with transition metal ions(Ni2+/Cd2+/Zn2+)to produce four novel complexes:Ni2.5(BPBD1)(TCPS)(HCOO)·2H2O(1),Cd(BPBD1)(TCPS)(2),Zn2(BPBD1)(TCPS)·H2O(3),Zn(BPBD1)(TCPS)05·H2O(4).The electrocatalytic activity of urea oxidation of 1 and Fluorescence detection of 2 and 3 were studied.2.N,N'-bis(3-pyridyl)-1,4-benzenedicarboxamide and tetrakis(4-carboxyphenyl)silane reacted with transition metal ions(Fe2+/Ni2+/Co2+)to afford three novel complexes:Fe(BPBD2)(TCPS)H2O(5),Ni(BPBD2)(TCPS)H2O(6)and Co(BPBD2)(TCPS)H20(7).The three complexes have the same structure mode.The electrochemical test UOR of complex 6 indicated that the current density of complex 6 was higher than that of OER at the same sweep number,showing the electrocatalytic performance of urea oxidation.This material has potential application value in the held of electrocatalytic urea oxidation.3.N,N'-bis(3-pyrndyl)-1,4-benzenedicarboxamide,tetrakis(4-carboxyphenyl)si lane and transition metal ions reacted to give five novel complexes:Ni2(BPBD2)2(TCPS)·2H2O(8),Mn4(BPBD2)(TCPS)2(DMA)H2O(9),CO4(BPBD2)(TCPS)2(DMA)·H2O(10),Zn(BPBD2)(TCPS)(11),Cd2(BPBD2)(TCPS)·H2O(12).The alkaline OER electrochemical test of complex 10 has been earied out.The material has potential application value in water electro-oxidation.The fluorescence of complexes 11 and 12 were also studied.