A new 3D POMOF with two channels consisting of Wells–Dawson arsenotungstate and {Cl4Cu10(pz)11} complexes: synthesis, crystal structure, and properties

Abstract

Herein, a new 3D POMOF [{Cl₄Cu₁₀(pz)₁₁}{As₂W₁₈O₆₂}]·1.5H₂O (pz = pyrazine) (1) has been synthesized using a hydrothermal reaction, and characterized by single-crystal X-ray diffraction analysis, elemental analysis, IR, TG, and UV-vis-NIR spectroscopy, XPS, BET analysis and XRD. Single crystal X-ray analysis reveals that compound 1 consists of the classical Wells–Dawson [As₂W₁₈O₆₂]⁶⁻ polyoxoanion and {Cl₄Cu₁₀(pz)₁₁} complexes. Compound 1 possesses two different channels which form a 3D topology framework with the Schläfli symbol of {3·4·5⁶·6⁷}²{3·4⁶·5³}²{3²·4²·5⁶·6⁵}. Additionally, compound 1 shows photoluminescence properties and excellent photocatalytic activity for the degradation of RhB dye under UV irradiation. The photocatalytic reaction kinetics and mechanism have been also investigated.