Two new polyoxomolybdate-based organic–inorganic hybrid compounds with copper ions and bridging ligands

Abstract

Two new polyoxomolybdate-based organic–inorganic hybrid compounds with copper ions and bridging ligands were prepared in a hydrothermal reaction system, and the chemical formulas are [Cu₂(L₁)₄S][Mo₆O₁₉] (1) and [Cu^IICu^I₂(L₂)₅][β-Mo₈O₂₆] (2) (L₁ = 1,2-bis(iminazole-1-ylmethyl)benzene, L₂ = 1,4-bis(1,2,4-triazol-1-ylmethyl)benzene). Complexes 1 and 2 were characterized by elemental analysis, IR spectra, TG analyses and single-crystal X-ray diffraction analyses. Compound 1 exhibits 2-D layers with honeycomb-like cavities, further stacking into a 3-D supramolecular framework with the [Mo₆O₁₉]^2- polyoxoanions as guest templates in the honeycomb-like cavities. Compound 2 possesses an overall 3D(2D/3D) framework constituted by the undulating 2-D motifs and the 3D sqp framework. The photocatalytic activities of 1 and 2 under UV light were investigated based on the degradation of methylene blue (MB). Both compounds exhibit efficient catalytic activity for the degradation of MB.

Keywords:

• Polyoxomolybdate
• organic–inorganic hybrid compound
• bridging ligand
• photocatalytic activity

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by National Natural Science Foundation of China (grant no. 21701120), Key Research and Development Program of Shanxi province (grant no. 202102090301026), the Natural Science Fund of Shanxi Province (grant no. 201601D202024) and Shanxi Key Laboratory of high value utilization of coal gangue (grant no. 202104010910004).