Coordination Polymers Based on Bis-Ligand-Containing Indole and 8-hydroxyquinoline Moieties

The novel bis-(bidentate)-ligand 5,5'-(3,3'-(phenyl methylene)bis(1H-indole-3,1-diyl)bis(methylene)diquinolin-8-ol) (PBIQ) was synthesized by condensation of 5-chloromethyl-8-hydroxyquinoline hydrochloride with 3,3'-(phenyl methanediyl) bis (1H-indole) in the presence of a base catalyst. Coordination polymers of this PBIQ bis-ligand were prepared with Cu(II), Ni(II), Co(II), Mn(II), and Zn(II) metal ions. All of these coordination polymers and the PBIQ parent ligand were characterized by elemental analyses, IR, NMR, diffuse reflectance and fluorescence spectral studies, number-average molecular weights [image omitted], magnetic susceptibilities, and by thermogravimetry. The microbicidal activity of all the samples has also been monitored against plant pathogens.