Synthsis And Structural Studies Of Aza-aromatic Ligands And Their Coordination Polymers

Because of its unique structure and potential application in catalysis, gas adsorption,and nonlinear optical materials,coordination polymer is one of highlights in the field of functionalized material.In this thesis, eight aza-aromatic ligands including N-(pyridin-4-yl)isonicotinamide, 2'2-bipyridyl-4'4-dicarboxylic acid,3'-(pyridin-4-ylcarbamoyl)-2,2'-bipyridine-3-carboxylic acid,N²,N⁷-di(pyridin-2-yl)naphthalene-2,7-disulfonamide,p-phthalaldehyde-2-amino thiazole,salicylaldehyde-2-amino thiazole,salicylaldehyde-2-amino pyridine and melamine hexacetic acid have been synthesized,and the corresponding coordination polymers have been explored by hydrothermal method under different conditions.1,3-Di(4-bipyridyl)propane(bpp) with the flexible linker between two pyridine units has different coordination styles and naphthalene sulfonic anions can act as acceptor of hydrogen bonding interaction in coordination polymer.Here bpp used as neutral ligand and 1,6-naphthalene sulfonic anion used as balance ions,one crystal of Co(â…¡) cation has been obtained by solvothermal method.The structure has been determined by single crtstal X-ray diffraction.The results indicate molecular formule of the complex is[Co(bpp)₂(H₂O)₂]_n·n(1,6-nds)·7nH₂O and the crystal belongs to monoclinic system,P2₁/n space group with parameters a = 12.56800(10)(?),b = 19.7570(2)(?),c =17.0510(2)(?),α=90°,β=97.8230(4)°,γ=90°.In the crystal,1,6-naphthalene sulfonic anion acts as counter ion,and Co²⁺ coordinate four N atoms from different bpp ligands and two O atoms from water molecules in octahedron configuration.Similary,one crystal of Cd(â…¡) ion involving bpp ligand has been obtained as well.X-ray single crystal diffraction showed its molecular formule of the complex is[Cd₂(bpp)₃Cl₄]_n.nH₂O and the crystal belongs to triclintic system,P(?) space group with parameters a = 9.5040(3)(?),b =11.7820(3)(?),c = 18.3990(5)(?),α=92.9730(9)°,β=98.5090(9)°,γ=92.7320(10)°.In the crystal,Cd²⁺ coordinate four N atoms from different bpp ligands and two chloride ions in octahedron configuration.