Coordination polymers of manganese(II), cobalt(II), nickel(II) and cadmium(II) decorated with rigid pyrazine-2,3-dicarboxylic acid linker: Synthesis, structural diversity, DFT study and magneto-luminescence properties

Single crystal diffraction analysis shows the formation of four new coordination polymers (CPs), viz. {[Mn(Pyzdc)(H2O)2]·2H2O}n (1), [Co(Pyzdc)(H2O)2]n (2), [Ni(Pyzdc)(H2O)2]n (3) and [Cd(Pyzdc)]n (4) (where Pyzdc2− stands for the fully-deprotonated pyrazine-2,3-dicarboxylic acid), by the solvothermal self-assembly of the four titled metal(II) nitrates with rigid pyrazine-2,3-dicarboxylic acid. CP 1 crystallizes in the monoclinic P21/c space...