Studies on two coordination polymers [M(μ4-pz25dc)]n (M = Cd or Zn, pz25dc = pyrazine-2,5-dicarboxylato) with three-dimensional pillared-layer three-nodal framework: Synthesis, structural characterization, strong optical non-linearities and optical l

Two isomorphous coordination polymer candidates for nonlinear optical (NLO) materials have been synthesized hydrothermally and characterized crystallographically as pillared-layer three-nodal frameworks. Both polymers have large hyperpolarizability γ and limiting threshold values. The heavy atom effect plays important role in the enhancement of optical non-linearities and optical limiting properties.