Accessing three oxidation states of cobalt in M 6 L 3 nanoprisms with cobalt–porphyrin walls

Pt 2+ -linked M 6 L 3 nanoprisms with cobalt–porphyrin walls were prepared and their redox properties were evaluated, leading to the first time that cobalt–porphyrin nanocages have been characterized in Co I , Co II , and Co III states.