A new 1-D chain based on the trivacant monocapped Keggin arsenomolybdate and the copper complex linker: synthesis, crystal structure, and ESI-MS analyses

Abstract

A new organic–inorganic hybrid (H₂en)₂[[Cu(en)₂]As^IIIAs^VMo^VI₉O₃₄]·6H₂O (1), containing a 1-D helical chain based on the trivacant monocapped Keggin arsenomolybdate and the copper complex linker {[Cu(en)₂][As^IIIAs^VMo^VI₉O₃₄]}_n⁴ⁿ⁻ (en = ethylenediamine), has been synthesized and characterized by IR spectra, TG analyses, single-crystal X-ray diffraction, and high-resolution electrospray ionization mass spectrometry (ESI-MS). Large voids are observed and a 1-D chain containing repeated (H₂O)₈ water units from lattice water molecules is formed along the a axis in the crystal structure. The high-resolution ESI-MS shows that the intact framework [Cu(en)₂][As^IIIAs^VMo^VI₉O₃₄]⁴⁻ exists in solution.

Graphical Abstract

Keywords:

• Polyoxometalate
• Organic–inorganic hybrid
• Water cluster
• 1-D chain
• ESI-MS

Funding

This work was supported by the National Natural Science Foundation of China [Grant number 21373159] and Funded projects of Independent Innovation of Northwest University Postgraduates [Grant number YZZ12034].