Sequential Synthesis of Heterometallic Complex Based on the C-Shaped Molybdovanadate: Synthesis, Crystal Structure and Magnetic Properties

A new molybdovanadate-based heterometallic complex, (NH₄)_17.5[Co_0.5Na_0.5(H₂O)₃]₂[Co(H₂O)₄]₂[(Cu₆(H₂O)₂(OH)₂V₉Mo₂₃O₁₀₈)]·23.5H₂O (1), was synthesized through the sequential-synthetic method and fully characterized. Structural analysis reveals that compound 1 exhibits a two-dimensional (2D) framework constructed from the C-shaped {V₉Mo₂₃Cu₆} anions connected by [Co(H₂O)₄]²⁺ and [Co_0.5Na_0.5(H₂O)₃]^1.5+ units. Compound 1 has a columnar structure with a smooth surface, sharp fringes, and an average size of 40 nm. Photophysical studies show that compound 1 has a band gap of ca. 2.13 eV. Magnetic studies reveal the presence of strong antiferromagnetic interactions in compound 1.

A new molybdovanadate-based heterometallic complexes constructed from the C-shaped {V₉Mo₂₃Cu₆} clusters linked with [Co(H₂O)₄]²⁺ and [Co_0.5Na_0.5(H₂O)₃]^1.5+ units has been synthesized. Compound 1 has a band gap value of ca. 2.13 eV and exhibits the dominant antiferromagnetic behavior.