Structures, fluorescence and magnetism of a series of coordination polymers driven by a tricarboxypyridine ligandt

In this study, a tricarboxypyridine ligand 3-((5-carboxypyridin-3-yl)oxy)phthalic acid (H(3)cppa) that combines three distinct types of functional groups (COOH, O-ether and N-pyridyl) was used to construct metal complexes by a hydrothermal reaction, and eight new complexes were constructed, namely, [Zn(mu(3)-Hcppa)center dot 2H(2)O](n) (1), [Cd(mu(4)-Hcppa)center dot H2O](n) (2) [Cd(mu(2)-H(2)cppa)(2)center dot 2H(2)O](n) (3). [Mn(mu(2)-Hcppa)center dot(phen)center dot H2O] (4), [Co-3(mu(3)-cppa)(2)center dot 19H(2)O](n) (5), [Co(mu(2)-H(2)cppa)(2)center dot 2H(2)O](n) (6), [Co(mu(3)-Hcppa)center dot(phen)center dot 2H(2)O](n) (7), and [Fe(mu(2)-H(2)cppa)(2)center dot 2H(2)O](n) (8). The complexes were all characterized at room temperature by single crystal X-ray diffraction, infrared analysis and elemental analysis in the solid state; structure analyses reveal that complexes 1 and 2 have 2D network structures, complexes 3, 5, 6, 7, and 8 have a 1D chain structure and complex 4 has a OD structure. In addition, luminescence behavior of complexes 1-3 was investigated and magnetic properties of complexes 4-8 were studied. The fluorescence test results show that the fluorescence intensities of complexes 1, 2 and 3 are lower than that of the ligand; the magnetic results indicate antiferromagnetic interactions in complexes 4, 5, 6, and 7 and weak ferromagnetic interactions in complex 8.