A novel 2-D structure constructed from copper complexes and bi-capped tungsten-based Keggin clusters

• New bi-capped tungsten-based Keggin anion [VVWVI6.5WV3VIV4.5O42]7 −
• 2-D layer structure formed by bi-capped tungsten-based Keggin anions and TMCs.
• Compound 1 shows antiferromagnetic interactions.

A new compound, [Cu(en)2(H2O)]{[Cu0.5(en)]3[VVW6.5VIW3VV4.5IVO42Cu(en)2]}·3.5H2O (1) (en = ethylenediamine), has been hydrothermally synthesized and characterized by elemental analysis, IR, ESR, XPS, TG analysis and single-crystal X-ray diffraction analysis. Compound 1 exhibits a novel 2-D structure linked by 1-D infinite left- and right-handed helical chains and transition metal coordination fragments. Adjacent layers are further interconnected into a 3-D supramolecular structure via hydrogen bonds. The magnetic susceptibility of compound 1 demonstrated the presence of antiferromagnetic interactions.

[Cu(en)2(H2O)]{[Cu0.5(en)]3[VVW6.5VIW3VV4.5IVO42Cu(en)2]}∙3.5H2O (1) (en = ethylenediamine) exhibits a novel 2-D structure containing unusual 1-D infinite left- and right-handed helical chains linked by transition metal fragments. Adjacent layers are further interconnected into a 3-D supramolecular structure via hydrogen bonds.Figure optionsDownload as PowerPoint slide