Highest-T_c single-component homochiral organic ferroelectrics

Abstract

Organic single-component ferroelectrics with low molecular mass have drawn great attention for applications in organic electronics. However, the discovery of high-Tc single-component organic ferroelectrics has been very scarce. Herein, we...

Competing ferroelectric polarization: hydroxyl flip-flop versus proton-transfer mechanisms

“…It should be noted that this temperature is close to the highest Curie temperature observed among the single-component organic ferroelectrics (429 K for homochiral 10-camphorsulfonylimine). 20 The anomaly is split into two peaks, suggesting the presence of an intermediate phase with a very narrow temperature interval above the first order phase transition. It should be noted that the phase transitions were reversible and reproduced in the second run (Fig.…”

An unprecedented azobenzene-based organic single-component ferroelectric

“…2a ). Such a high T c is beyond that of most organic single-component molecular ferroelectrics such as thiourea (169 K), 8 2,2,6,6-tetramethyl-1-piperidinyloxy (287 K), 8 trichloroacetamide (355 K), 8 cyclohexan-1,1′-diacetic acid (397 K), 8 ( R )-3-quinuclidinol (400 K), 10 (−)-camphanic acid (414 K), 27 and R -10-camphorsulfonylimine (429 K), 28 and is even greater than that of the inorganic ferroelectric BaTiO 3 (393 K). 29 This high T c of APFA could be mainly attributed to the intramolecular hydrogen bonding interaction as well as the interlaminar π–π stacking interaction.…”

Enantiomeric Hydrogen-bonded Chains Driving Ferroelectric and Nonlinear Optical Behavior

“…The blue dots and the dark blue line are the experimental data and the fitting curve, respectively. (b) Diagram of comparison between different organic ferroelectrics. ,,− Note: MDABCO = N -methyl- N ′-diazabicyclo­[2.2.2]­octonium, 1 = di­(benzylamino)-substituted derivative of muconic acid, APFA = 2-amino-2′,4,4′,6,6′-penta-fuoroazobenzene. (c) Correspondence diagram of the SHG intensity and particle size of [HDABCO]­[ l -MA] at room temperature.…”