Methylated B-type Anderson heteropolymolybdate: synthesis, structure, and magnetic properties

Abstract

Anderson-type hexamolybdochromates [Co^Ш(bpy)₃][CrMo₆(OH)₅ (OCH₃)O₁₈]·12H₂O (1) and [Co^Ш(bpy)₃][CrMo₆(OH)₆O₁₈]·15H₂O (2) were synthesized and characterized by elemental analysis, IR spectroscopy, thermal gravimetric analysis, and single-crystal X-ray diffraction. Compound 1 shows the first example that the B-type Anderson polyanion is functionalized by methyl through dehydration between a nonacidic proton and hydroxyl group of methanol. When the pH changed, 2 has been obtained and contains two types of [Cr(OH)₆Mo₆O₁₈]^3- anions with different Cr − O bond lengths. The synthesis of 1 indicates that B-type Anderson polyanions can be functionalized by methyl group under proper reaction conditions; this suggests a new route to functionalize polyoxometalates to form organic-inorganic hybrids.

Graphical Abstract

Keywords:

• Polyoxometalates
• functionalization
• methylated
• nonacidic proton

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

The authors are thankful for the financial support from the National Natural Science Foundation of China [Grant No. 21671035].