Constructions of a Set of New Lanthanide-Based Coordination Polymers with Hatza Ligands (Hatza = 5-Aminotetrazole−1-Acetic Acid)

Reaction of LnCl<sub>3</sub>·6H<sub>2</sub>O with 5-aminotetrazole-1-acetic acid (Hatza) under the presence of KOH produced a set of new Ln(III)/atza complexes, [Ln(atza)<sub>2</sub>(CH<sub>3</sub>OH)(H<sub>2</sub>O)Cl][Ln = Pr (<b>1</b>), Nd (<b>2</b>), Sm (<b>3</b>)], [Ln(atza)<sub>2</sub> (H<sub>2</sub>O)<sub>3</sub>]Cl [Ln = Eu (<b>4</b>), Gd (<b>5</b>)], and [Tb(atza)<sub>2</sub>(H<sub>2</sub>O)<sub>4</sub>]Cl (<b>6</b>). These compounds were structurally characterized by elemental analysis, IR spectroscopy, and single-crystal X-ray diffraction. The complexes <b>1</b>−<b>3</b> are isostructural and display two-dimensional frameworks, the isostructural complexes <b>4</b>−<b>5</b> show one-dimensional (1D) structures, and complex <b>6</b> forms a 1D framework. Furthermore, the luminescence properties of <b>4</b> and <b>6</b> were investigated at room temperature in the solid state.