Study The Synthesis And Characterization Of Novel Coordination Polymer Containing The Pyridine The Pyrazine Aromatic Heterocyclic Ligands

In this dissertation eight novel coordination polymers have been synthesized, which include the two-dimensional Co(II) coordination polymers [Co(μ1,3-SCN)(μ-L1)]n (2) and [Co(μ1,3-SCN)(μ-L2)]n (3) with 4-methylpyridine- N-oxide (4-methoxypyridine N-oxide) and thiocyanate as mixed bridged ligands; the three-dimensional Cd(II) coordination polymer [Cd(μ1,3-SCN)2- (μ-L3)]n (4) with 3, 5-dimethylpyridine N-oxide and thiocyanate as mixed bridged ligands; the one-dimensional Cd(II) coordination polymer[Cd(L1)(μ-I)I]n (1) with 4-methylpyridine N-oxide and iodic anion as mixed bridged ligands; the two-dimensional Cu(II) coordination polymer {[Cu(μ-L4)1.5(ClO4)2(H2O)]- ?(H2O)0.5}n (5) with pyrazine-1, 4-dioxide as bridged ligand; the one-dimensio- nal Mn(II) coordination polymer {[Mn(μ1,6-L5)(L6)2(H2O)2]?(ClO4)2}n (6) with 2, 5-dimethylpyrazine-1, 4-dixide as bridged ligand; the three-dimensional Cd(II) coordination polymer [Cd2(μ1,3-SCN)4(μ4-L7)]n (7) with 2, 3, 5, 6-tetramethyl- pyrazine-1, 4-dioxide and thiocyanate as mixed bridged ligands; the two- dimensional Cd(II) coordination polymer [Cd(μ1,6-L8)(μ1,3-SCN)2]n (8) with 3-(pyrazin-2-yl)pyridin-2-ol and thiocyanate as mixed bridged ligands. The eight coordination polymers were characterized with infrared spectra and their crystal structures determined by X-ray crystallography. For complexes (4), (7) and (8), fluorescence was studied. The results of this dissertation will benefit the design and synthesis of novel coordination polymers with derivatives of pyridine N-oxide and pyrazine-1, 4-dioxide and thiocyanate as bridged mixed ligands.