Structural diversity of four coordination polymers based on 5-nitro-1,2,3-benzenetricarboxylic acid (H3nbta): Solvothermal syntheses, structural characterizations and properties

Sensitivity to NH3 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 (H2dmg) and 1,4-bis(1H-1,2,4-triazol-1-ylmethyl)benzene (pbtx)/1,2-bis(1H-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), [Co2(μ-dmg)2(μ-pbtx)2]n (4), and [Cd(μ-dmg)(H2O)(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 (NH3) vapor. The [Co2(μ-dmg)2(μ-pbtx)2]n (4)-based sensor agent was found to show promising sensor properties in detecting NH3 vapor.

The crystal structure of poly[diaqua-(μ3-5-nitrobenzene-1,2,3-tricarboxylato-κ 3 O:O′:O′)-(μ2-4,4′-dipyridylamine-κ 2 N:N′)copper(II)], C38H30Cu3N8O20

C38H30Cu3N8O20, triclinic, P 1 ‾ $P\bar{1}$ (no. 2), a = 7.2659(3) Å, b = 11.7245(3) Å, c = 12.6837(4) Å, α = 77.466(3)°, β = 73.915(3)°, γ = 75.794(3)°, V = 993.50(6) Å3, Z = 1, R gt (F) = 0.0334, wR ref (F 2) = 0.0842, T = 291 K.

Synthesis and crystal structures of Zn(II) and Cd(II) coordination polymers derived from the flexible N-(4-carboxyphenyl)iminodiacetic acid and auxiliary ligands

Two coordination polymers [Cd3(CPIDA)2(bib)(H2O)2] n 1 and {[Zn6(CPIDA)4(bix)3]·8H2O} n 2 (H3CPIDA = N-(4-carboxyphenyl) iminodiacetic acid, bib = 1,4-bis(N-imidazolyl)butane, bix = 1,4-bis(imidazol-1-ylmethyl)benzene), have been hydrothermally synthesized and characterized by analytical and IR spectroscopic data. Compound 1 displays an interesting 3D framework with trinodal (4,5)-connected topology, consisting of (4,4) rectangular grid double layers linked by trans-bib ligands. In 2, the corrugated nets with couples of central symmetrical chains constructed by CPIDA3− and bridging trans-bix ligands are pillared by infinite tubes made from CPIDA3− and cis-bix ligands to build a new 3D porous framework with parallelogram-shaped channels, exhibiting a pentanodal (3,4)-connected topology. Moreover, compounds 1 and 2 show intense solid state fluorescence at room temperature.