Syntheses,Structures And Properties Of Coordination Polymers Based On Fluorene And Dibenzofuran N-containing Ligands

In this paper,a fluorene-containing linear ligand,2,7-di（pyridin-4-yl）-9H-fluorene（DPFE）and two dibenzofuran-containing V-shaped ligands,2,8-di（pyridin-4-yl）dibenzo[b,d]furan（BPFP）,2,8-di（1H-imidazol-1-yl）dibenzo[b,d]furan（BPFI）,were employed to react with different transition matal ions in the presence of dicarboxylate ligands and successfully constructed twelve coordination polymers.The structure of compound was full characterized by single crystal X-ray,FT-IR spectroscopy,elemental analysis,thermogravimetric analysis and powder X-ray diffraction（PXRD）.In addition,the magnetic properties and the fluorescence properties of compounds were discussed.Two parts of this work are summarized as follows:1.Syntheses,structures and properties of coordination polymers based on fluorene-containing linear ligand.Seven compounds,namely,{[Co₃（DPFE）₂（sbda）₄（OH）₂]·（DPFE）（CH₃CN）}_n（1）,[Co₂（DPFE）（oba）₂]_n（2）,[Co（DPFE）（bpda）（H₂O）₂]_n（3）,[Mn（DPFE）（bpda）（H₂O）₂]_n（4）,[Cd（DPFE）（bpda）（H₂O）₂]_n（5）,[Cd（DPFE）（adpt）_0.5（NO₃）]_n（6）,[Cd（DPFE）（sbda）]_n（7）have been synthesized hydrothermally and structurally characterized,where DPFE was the main ligands.Compound 1 is an extremely rare example of a 1D pseudorotaxane chain.Compound 2 presents a homochiral 3D framework with right-handed 4₁ helix along the c axis.Compound 3-5 are isostructural and show unique2D bilayer structure.Compound 6 displays two-dimensional sql layer.Compound 7exhibits a 2-fold interpenetrated 3D framework.The magnetic properties of 1,2 and the fluorescence property of 5-7 are discussed.In addition,compound 5 as a fluorescent probe exhibits a highly sensing ability to Ag⁺ions and luminescent decay curve of 6 was investigated.2.Syntheses,structures and properties of coordination polymers based on dibenzofuran-containing V-shaped ligands.Five compounds,namely,{[Co₂（BPFP）（sbda）₂（H₂O）₂]·（H₂O）（CH₃CN）}_n（8）,{[Cd₂（BPFP）₄（sbda）₂]·（H₂O）}_n（9）,[Co₃（BPFP）₂（suc）₃（H₂O）₂]_n（10）,[Co₂（BPFP）₂（suc）₂]_n（11）,[Co（BPFI）（ndc）]_n（12）have beensynthesized hydrothermally and structurally characterized,where BPFP and BPFI were the main ligands.Compound 8 features a homochiral 2D net with right-handed 2₁ helix along the a axis.Compound 9 shows a parallel 2D+2D→2D interpenetration.Compound10 and Compound 11 have been synthesized by one-pot reaction.Compound 10retains 8-connected self-penetrating 3D framework.Compound 11 reveals a5-connected bnn topology 3D framework.Compound 12 is a unique 2D layer decorated with parallel double chains.In addition,the magnetic properties of 8,12and the fluorescence property of 9 are discussed.