A ferric guest inside a spin crossover ferrous helicate

Chem Commun (Camb). 2022 Apr 28;58(35):5375-5378. doi: 10.1039/d2cc00928e.

Abstract

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.