An Unprecedented M–O Cluster Constructed from Nanosized {[C5NH5]9[H31MoV12O24CoII12(PO4)23(H2O)4]}2– Anions Exhibiting Interesting Nonlinear-Optical Properties

A novel high-nuclear nanosized cluster modified by conjugated organic ligands (pyridine and imidazole), [C 5 NH 5 ] 8 [C 3 H 5 N 2 ] 2 {[C 5 NH 5 ] 9 [H 31 Mo 12 O 24 Co 12 (PO 4 ) 23 (H 2 O) 4 ]}·12H 2 O ( 1 ), has been successfully isolated under hydrothermal conditions and structurally characterized. Compound 1 consists of 12 Co II and 12 Mo V ions linked by 23 {PO 4 } groups, exhibiting unprecedented nanosized ship-shaped clusters. The magnetic measurements reveal that compound 1 exhibits dominant antiferromagnetic interactions. Additionally, pyridine and imidazole ligands enhance the delocalized electron effects of clusters, and the third-order nonlinear-optical response of compound 1 is excellent.