Two three-dimensional coordination polymers of lead(II) with iminodiacetate and naphthalene-dicarboxylate anions: Synthesis, characterization and luminescence behavior

• 1 is a trinuclear complex of Pb(II) growing to 3D network via weak interactions.
• In 1, layers of (4,4) rhomboidal topology are identified.
• In 2, the ndc anion adopts interesting bis-(bidentate bridging) coordination.
• In 2, network is reinforced by C–H…π-ring interactions between the ndc rings.

Two lead(II) compounds [Pb3(idiac)3(phen)2(H2O)]·2(H2O) (1) and [Pb(ndc)]n (2), where H2idiac=iminodiacetic acid, phen=1,10-phenanthroline and H2ndc=naphthalene-2,6-dicarboxylic acid, have been synthesized and structurally characterized. Single crystal X-ray diffraction analysis showed that compound 1 is a discrete trinuclear complex (of two-fold symmetry) which evolves to a supramolecular 3D network via π–π interactions, while in compound 2 the naphthalene dicarboxylate anion act as a linker to form a three dimensional architecture, where the anion adopts a bis-(bidentate bridging) coordination mode connecting four Pb(II) centers. The photoluminescence property of the two complexes has been studied.

graphical abstractTwo new topologically different 1D coordination polymers formed by Pb4 clusters have been synthesized and characterized by x-ray analysis. The luminescence and thermal properties have been studied.Figure optionsDownload as PowerPoint slide