A novel chain structure constructed from copper complexes and dimers based on bi-capped Keggin clusters

Abstract

Abstract A new compound, [Cu(en) 2 ][Cu(en) 2 (H 2 O)] 2 [SiMo 8 V 6 O 42 ][Cu(en) 2 ]·1.5H 2 O ( 1 ) (en = ethylenediamine), has been hydrothermally synthesized and characterized by elemental analysis, IR, ESR spectrum, TG analysis and single-crystal X-ray diffraction analysis. Compound 1 represents a 1-D zigzag chain-like structure constructed from dimeric units of bi-capped polyoxoanions {[Cu(en) 2 ] 2 [Cu(en) 2 (H 2 O)] 2 [SiMo 8 V 6 O 42 ] 2 [Cu(en) 2 ]} 6− and transition metal coordination fragment [Cu(en) 2 ] 2 + . The adjacent chains are further interconnected into a 3-D supramolecular structure via hydrogen bonds. The magnetic susceptibility of 1 demonstrated the presence of antiferromagnetic interactions.