Coordination polymers of cadmium with (4-carbomethoxy-naphthalen-1-yloxy) acetic acid derivatives

Three cadmium coordination polymers derived from the dianions of (4-carboxymethoxy-naphthalen-1-yloxy) acetic acid (LH₂) and (4-carboxymethoxy-2,3-bis-arylsulfanyl naphthalene-1-yloxy) acetic acid (L₁H₂), in which the dianions of the corresponding acids act as a spacer to cadmium nodes, have been prepared and characterized. The coordination polymer of the dianion of (4-carboxy-methoxy-2,3-bis-arylsulfanylnaphthalene-1-yloxy) acetic acid with cadmium is a 3-D coordination polymer, whereas the dimensionality of the coordination polymer of the dianion of (4-carboxymethoxy-naphthalen-1-yloxy) acetic acid is dependent on the ancillary ligand. The presence of the chelating ligand 1,10-phenanthroline gave a 1-D polymer of the dicarboxylate anion L, but in the absence of a chelating ligand a 2-D coordination polymer encapsulating hexa–aquacadmium(II) ions was obtained. The latter two coordination polymers show fluorescence emission in the solid state.