A room-temperature nitrite-based hybrid bimetal molecular ferroelectric material: [(R)-3-quinuclidinol](2)[LiCo(NO2)(6)]

Organic-inorganic hybrid molecular ferroelectrics have attracted broad attention in the field of research of ferroelectric materials. Following the surge of stable candidates, hybrid bimetal molecular-based materials have been recently explored to achieve excellent ferroelectricity. However, rare hybrid bimetal molecular ferroelectrics were reported. Inspired by '' ferroelectrochemistry '', a chiral nitrite-based hybrid bimetal molecular ferroelectric material, [(R)-3-quinuclidinol](2)[LiCo(NO2)(6)] (1), was reported. The ferroelectricparaelectric phase transition (C2 <-> P321) behaviour of 1; was found at 343 K (Curie temperature, T-c) with a spontaneous electronic polarization (P-s) of 0.52 mu C cm(-2) and a coercive field (E-c) of 48 kV cm(-1) at 298 K. Various-temperature single crystal structural analysis and dielectric constant measurements reveal that the rapid rotation of the organic cation and slight order-disorder transition of the NO2- anion are the origin of the ferroelectricity. To our knowledge, 1 is the first example of a nitrite-based hybrid bimetal molecular ferroelectric material that is triggered by an external electric field. This finding establishes a clear stimulusstructure-response relationship in advanced hybrid ferroelectric materials.