Organic Ammonium Flexibility Modulated Phase-Transition Behaviour in 3D Perovskite-like Mixed-valence Iron Complexes

Abstract

By employing oxalate to modify the connectivity of formate perovskites, novel perovskite-like cai topological 3D antiferromagnets [A]2[FeIIIFeII2(HCOO)7(C2O4)] with different organic ammonium were synthesized. The reduction of π-conjugated systems in organic ammonium increase their structural freedom, adjusting the phase transition of these complex from zero-step to one- and two-step types.