Synthesis, crystal structure, supramolecular assembly, and thermal stability of two new lanthanide coordination polymers based on α-naphthoxyacetate

Two new lanthanide coordination polymers [Ln(noa)(3)(H(2)O)(2)] [Ln = Pr (1) and Nd (2), noa = alpha-naphthoxyacetate] have been synthesized under hydrothermal conditions and characterized by X-ray crystallography, IR spectra, and thermal analysis. In the crystal structure, adjacent Ln(III) ions were connected each other by tridentate bridging noa anions to form a one-dimensional (1D) chain-like structure. Moreover, the 1D chains were further linked together via hydrogen bonds and pi-pi attractions, resulting in an extended two-dimensional (2D) supramolecular network. The noa ligands adopted two different coordination modes, namely, chelating and tridentate bridging.