A ferric guest inside a spin crossover ferrous helicate.
Leoní A BarriosRosa DiegoMohanad D DarawshehJesús I MartínezOlivier RoubeauGuillem AromíPublished in: Chemical communications (Cambridge, England) (2022)
A designed dimetallic Fe(II) helicate made with biphenylene-bridged bispyrazolylpyridine ligands and exhibiting a process of spin crossover at temperatures above ambient is shown to encapsulate an S = 5/2 tris-oxalato Fe(III) ion. The spin relaxation dynamics of this guest are strongly reduced upon encapsulation.