Sensitivity to NH 3 Vapor: Synthesis and Characterization of Five New Coordination Polymers Based on 2,2-Dimethylglutaric Acid and Bis(triazole)-Derived Ligands.

Five new coordination polymers (CPs) were obtained as a result of hydrothermal reactions of 2,2-dimethylglutaric acid (H 2 dmg) and 1,4-bis(1 H -1,2,4-triazol-1-ylmethyl)benzene ( pbtx )/1,2-bis(1 H -1,2,4-triazol-1-ylmethyl)benzene ( obtx ) ligands with some metal ions [Co(μ-dmg)(μ-obtx)] n ( 1 ), [Zn(μ-dmg)(μ-obtx)] n ( 2 ), [Cd(μ-dmg)(μ-obtx)] n ( 3 ), [Co 2 (μ-dmg) 2 (μ-pbtx) 2 ] n ( 4 ), and [Cd(μ-dmg)(H 2 O)(μ-pbtx)] n ( 5 ). All of the compounds were characterized by elemental analysis, FT-IR spectroscopy, single-crystal X-ray diffraction, powder X-ray diffraction, and thermal analysis techniques. The single-crystal X-ray studies show that all compounds exhibit 2D layer structures. To examine the ammonia sensing properties of five new coordination complexes ( 1-5 ), the absorption and emission spectra of CPs embedded in ethyl cellulose thin films were measured by exposure to different concentrations of ammonia (NH 3 ) vapor. The [Co 2 (μ-dmg) 2 (μ-pbtx) 2 ] n ( 4 )-based sensor agent was found to show promising sensor properties in detecting NH 3 vapor.