Hydrothermal Synthesis And Properties Studies Of Coordination Polymer By Using Organic Ligands Containing Pyridyl Group

Hydrothermal synthesis of metal coordination polymers has aroused a great deal of interest. This thesis was focused on the hydrothermal synthesis of construction polymers by using transition metal (such as Cd²⁺,Zn²⁺ et al) as metal center and x-Hpytz (x-Hpytz = 3,5- di(x-pyridyl)-1,2,4-triazole, x=2,3,4) as ligands. Following 10 novel complexes were obtained, [Cd(2-pytz)Cl]_∞(1) (1D zig-zag chains),Fe₂(2-pytz)₂(SCN)₂·4H₂O (2) (Dinuclear),[Cd₂(2-Hpytz)(SO₄)]_∞(3) (1D ladder- like), [Zn(3-pytz)(OH)Cl₂]_∞(5) (1D ladder- like) , [Zn(3-Hpytz)(SO₄)·7.5H₂O]_∞(6) (1D zig-zag chains) ,[Cd(3-Hpytz)(SO₄)]_∞(7) (3D hole frame),[Ag(4-pytz)]_∞(10) (2D T-shape network ),[Zn(4-pytz)Cl]_∞(11) (3D hole frame) , [Cd(4-H₂pytz)(SCN)₂·3H₂O]_∞(12) (3D diamondoid net),[Zn₂(4-pytz)(SO₄)(OH)]_∞(13) (3D porous framework)。Experiment temperatures, reactant ratio and pH value and the addition of second ligand affected the reaction. Three new complexes were obatined by normal hydroponic method, [Cd(2-Hpytz)(SO₄)]∞(4) (1D zig-zag chains),[Cd(3-Hpytz)(SO₄)·5H₂O]_∞(8) (1D zig-zag chains),[Ag(3-pytz) (BF₄)]_∞(9) (2D T-shape). Introduction of second ligand affected the structure effectively.Another ligand--4,4'-dipyridyl sulfide (dps) containing pyridyl group was utilized to self assembly with transition metals (such as Cd²⁺,Fe²⁺), 2 novel 1D chains coordination polymers were obtained, [Fe(dps)₂(SCN)₂(H₂O)₂]_∞(14) , [Cd(dps)₂ (SCN)₂(H₂O)₂]_∞(15).