| According to different coordination environment, the flexible ligand can change itself conformation to form abundance novely structures.In this paper,we have used dca,KSCN,1,2-benzenedicarboxylic acid,1,4-benzenedicarboxylic acid,1,2,4,5-benzenetetracarboxylic acid,5-nitroisophthalic acid and 5-sulfoisophthalic acid as the secondary unit building to synthesize coordination polymers.The secondary unit buildings are used common in the coordination polymer's design in recent years. In the competition with the organic ligand, it can construct novel structures according to the different coordination environment.In the work, we reported ten coordination polymers using flexible ligands 1,2-bis(1H-1,2,4-triazol-1-ylmethyl)benzene (obbtz) and transition metal cations Zn(â…¡), Cd(â…¡),Co(â…¡),namely, [Cd(dca)2(obbtz)2]n (1), [Zn(dca)2(obbtz)2 (2),{[Cd(obbtz)2(H2O)2](SiF6)2}n (3),[Cd(obbtz)(NCS)2]n (4),{[Cd(obbtz)(1,2-bdc)](H2O)}n (5),[Cd(obbtz)(5-NO2-bdc)(H2O)]n (6),{[Cd3(obbtz)2(5-SO3-bdc)2(H2O)6](H2O)12}n (7), {[Zn(obbtz)(1,4-bdc)](H2O)4}n (8), {[Zn2(btec)(obbtz)2](H2O)}n (9), [Co(obbtz)(5NO2-bdc)]n (10). The ten compounds havebeen characterized by elemental analysis, IR Spectra, X-ray crystallography, luminescence analyses, thermogravi-metric analyses.It shows the flexible ligand usually function as bridge to connect two centers and form one-dimensional double-stranded chain, two-dimensional network structure, three-dimensional netwok to form stable complexes, the flexible ligand may change itself conformation. |
PDF Full Text Request