Homometallic Intervalence Charge Transfer Band of Co(II/III) Induced by Phase Transitions in a Heterometallic Co-W Charge Transfer Photomagnet.

ABSTRACT: A photomagnet, Co₈[W(CN)₈]₅Cl·(pyrazine)₁₁·21H₂O, exhibiting Class II mixed valency due to homometallic intervalence charge transfer (IVCT) between Co^II and Co^III centers, is synthesized. The compound features a 3D cyanido-bridged CoW coordination network composed of two crystallographically independent Co sites (Co1 and Co2) and one W site. Rectangular tubular structures formed by Co1-W bridges are further crosslinked by the Co2 sites. Defects in the [W(CN)₈] sites enable the formation of pyrazine bridges between the Co1 sites. Upon cooling, the compound undergoes a two-step thermal phase transition, attributed to heterometallic charge-transfer-induced spin transitions between high- and low-spin electr

SUBMITTER: Nakamura K 

PROVIDER: S-EPMC12825454 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature