12-Metal 36-membered ring based WV–CoII layers showing spin-glass behavior

Abstract

The present study describes the designed synthesis, X-ray structures, and magnetic properties of two 2D cyano bridged heterobimetallic W^V–Co^II networks, {[W(CN)₈]₂[Co(phpy)₄]₃}·2CH₃OH·2H₂O (1) and {[W(CN)₈]₂[Co(4-spy)₄]₃}·6H₂O (2) (phpy = 4-phenylpyridine, 4-spy = 4-styrylpyridine). Both compounds consist of cyano-bridged 12-metal 36-membered ring units, Co₆W₆(CN)₁₂, joined by organic linkers into a 2D plane. The layer presents a corrugated configuration in compound 1 and a plane configuration in compound 2 due to different π–π stacking interactions. Magnetic measurements reveal that both 1 and 2 have a transition to the spin glass-like phase due to competitive magnetic interactions.