Chlorocholine Perchlorate is an Organic Ferroelectric with Two‐Step Ladder‐like Dielectric, Second Harmonic Generation Effects, and Ferroelectricity

Abstract

The organic salt chlorocholine perchlorate [ClCH 2 CH 2 N-(CH 3 ) 3 •ClO 4 ] (CCP) is found to be a molecular ferroelectric with a high theoretical spontaneous polarization (Ps) value up to 17.09 μC cm À 2 . CCP exhibits two successive order-disorder phase transition at 332 and 365 K with space groups changing from Cc to Cmc2 1 and then P6 3 /mmc, accompanied by unusual two-step ladder-like dielectric, SHG signal with obvious "on/off" contrasts. These findingings provides a further instance of exploring successive thermal-stimuli multi-responsive switching materials applied as switches and sensors.[a] D.

Enhancing Phase Transition Temperature in Novel Crown Inclusion Materials through Anion‐Substitution Engineering

“…The structural configuration of the host molecule enables it to specifically bind and envelop the guest molecule, resulting in the formation of a stable complex. [7][8] Host molecules play a role of framework or cage and the guest molecules inside are prone to experience an order-disorder phase change under external stimulus. [9][10][11] Crown ether is always a typical host molecule and used to design different phase change materials.…”