Design, Syntheses, Characterization And Property Studies Of Porous Complexes With Flexible Carboxylic Acid

Porous complexes have attracted increasing interests, because of their widely applications in the areas of magnetism, catalysis, separation, and non-linear optics. In our work, two series complexes with porous structure have been synthesized derived from flexible meso-2,3-dibromosuccinic acid and L-glutamate acid.By controlling the pH value of the reaction systems, six novel porous complexes have been designed and synthesized with meso-2,3- dibromosuccinic acid ligand: {[Cu(C₄H₂Br₂O₄)]1/2[Cu(C₄H₂Br₂O₄) (H₂O)2]1/2(C₆H₁2N₄)?(H₂O)3}n(1);{[Ni(C₄H₂Br₂O₄)]1/2[Ni(C₄H₂Br₂O₄) (H₂O)2]1/2(C₆H₁2N₄)?(H₂O)3}n(2); [Ni(C₄H₂Br₂O₄) (C₃H₃N₂)₂(H₂O)2]n(3); [Co(C₄H₂Br₂O₄)(C₃H₃N₂)₂(H₂O)2]n(4);[Zn(C₄H₂Br₂O₄)(C₃H₃N₂)₂]n(5); [Cd₂(C₄H₂Br₂O₄)2(C₃H₃N₂)4(H₂O)₄]n(6).By controlling the evaporation rate of the systems, two complexes with chairl porous structures derived from L-glutamate acid have been constructed, {[Ni(C₅H₇NO₄)(H₂O)]·(H₂O)} n (7) and {[Ni₃(C₁2H₁₀O₅N)₂ (C₁₀H₈N₂)₃] .5H₂O} n (8).All the complexes have been characterized by elemental analyses, IR spectra and X-ray diffraction analyses. Magnetic property studies indicate that there are strong antiferromagnetism between the metal ions in complexes 1, 2 and 4 wheres there is strong ferromagnetism in the complex 3 and 8. The thermal analyses shown that all of the complexes are thermal stable.