Metal ion-dependent structural phase transition and impact of the Jahn–Teller effect in two organic–inorganic hybrid compounds

Abstract

Two new molecule-based organic–inorganic hybrid compounds, (H₂dabco)[M(H₂O)₆][SiF₆]₂ (dabco = 1,4-diazabicyclo [2.2.2] octane, M = Mn²⁺ & Cu²⁺), affected by the different metal ions and Jahn–Teller effect of Cu²⁺, exhibit metal ion-dependent structural phase transitions, large dielectric response, second harmonic generation (based on Mn²⁺) and ferroelasticity (based on Cu²⁺). This work provides an effective method to utilize Jahn–Teller distortion to design functional materials.