Insertion of a [Fe-II(pyimH)(3)](2+) [pyimH=2-(1H-Imidazol-2-yl)pyridine] Spin-Crossover Complex Inside a Ferromagnetic Lattice Based on a Chiral 3D Bimetallic Oxalate Network

摘要

The insertion of the [Fe-II(pyimH)(3)](2+) [pyimH = 2-(1H-imidazol-2-yl)pyridine] spin-crossover complex into a ferromagnetic bimetallic oxalate network affords the hybrid compound [Fe-II(pyimH)(3)][(MnCrIII)-Cr-II(ox)(3)](2)X (ox = C2O42-). This spin-crossover complex templates the growth of crystals formed by a chiral 3D oxalate network. The magnetic properties of this hybrid magnet show the coexistence of long-range ferromagnetic ordering at 4.5 K and a spin crossover of the intercalated [Fe-II(pyimH)(3)](2+) complex above 250 K. The compound presents a light-induced excited spin-state trapping (LIESST) effect below 60 K although with limited photoconversion (less than 8%).