One-dimensional zinc phosphates with linear chain structure

Abstract

Three one-dimensional zinc phosphates, [C₅N₂H₁₄][Zn(HPO₄)₂], I, [C₁₀N₄H₂₆][Zn(HPO₄)₂].2H₂O II, and [C₄N₂H₆]₂[Zn(HPO₄)], III, have been prepared employing hydro/solvothermal methods in the presence of organic amines. While I and II consist of linear chains of corner-shared four-membered rings, III is a polymeric wire where the amine molecule is directly bonded to the metal center. The wire, as well as the chain in these structures, are held together by hydrogen bond interactions involving the amine and the framework oxygens. The polymeric zinc phosphate with wire-like architecture, III, is only the second example of such architecture. Crystal data: I, monoclinic, P2₁/c (no. 14), a=8.603(2), b=13.529(2), c=10.880(1) Å, β=94.9(1)°, V=1261.6(1) ų, Z=4, ρ_calc.=1.893 gcm⁻³, μ(MoKα)=2.234 mm⁻¹, R₁=0.032, wR₂=0.086, [1532 observed reflections with I>2σ(I)], II, orthorhombic, Pbca (no. 61), a=8.393(1), b=15.286(1), c=22.659(1) Å, V=2906.9(2) ų, Z=8, ρ_calc.=1.794 gcm⁻³, μ(MoKα)=1.957 mm⁻¹, R₁=0.055, wR₂=0.11, [1565 observed reflections with I>2σ(I) and III, monoclinic, P2₁/c (no. 14), a=8.241(1), b=13.750(2), c=10.572(1) Å, β=90.9(1)°, V=1197.7(2) Å3, Z=4, ρ_calc.=1.805 gcm⁻³, μ(MoKα)=2.197 mm⁻¹, R₁=0.036, wR₂=0.10, [1423 observed reflections with I>2σ(I)].