Polarization-induced nanohelixes of organic cocrystals from asymmetric components with dopant-induced chirality inversion

Abstract

Supramolecular chirality is highly required for functional material development. In this study, we report the synthesis of charge-transfer (CT) complex-based twisted nanobelts using self-assembled cocrystallization from asymmetric component. An asymmetric...

Polar Organic Charge-Transfer Complex of the Asymmetrical Component for Flexible Piezoelectric Energy Harvesting and Self-Powered Wearable Sensors

“…The surface charges originated from the asymmetric arrangement (dipole ordering) of DBCz molecules could induce the twisting of micro/nanoscale ribbons via the exceeding electrostatic repulsion over the elastic energy. 40 Figure 1b illustrates the polarization hysteresis curves for the DBCz−TCNQ cocrystal under different applied voltages using the Radiant LC II ferroelectric tester. At room temperature, the clear polarization−electric field (P−E) hysteresis loops manifested the ferroelectricity, with a saturation polarization P s value of ∼1.23 μC/cm 2 and remnant polarization P r of ∼0.85 μC/cm 2 at an electric field of ∼1900 V/cm and the frequency (f) of 1 kHz.…”

Organic Charge‐Transfer Complex based Microstructure Interfaces for Solution‐Processable Organic Thin‐Film Transistors toward Multifunctional Sensing

“…Very recently, we reported that the DBCz/TCNQ co‐crystal belonged to a polar P c space group with a mixed‐stacking packing mode. [ 21 ] The noncentrosymmetric alignment generated polar ± (102) facets with accumulated charges. Meanwhile, the electrostatic repulsion caused the polarization‐induced twisting of free‐standing nanobelts.…”

Self-assembled stereomutation with supramolecular chirality inversion

“…Recently, Zhang et al revealed that the addition of achiral dopants can influence the chirality transfer and even induce the helicity inversion of the resultant micro-/ nano-structured co-crystals assembled from the charge-transfer complex of chiral 7H-dibenzo[c,g]-carbazole and achiral 7,7,8,8tetracyano-quinodimethane. 58 Two-component assembled gels, based on the helical co-association of co-gelators with diverse chemical structures and physical functions, offer multiple noncovalent interactions and various stimuli to regulate the asymmetrical arrangement of co-gelators and endow the resulting supramolecular assemblies with tunable handedness. Liu and Feng found that the exchange of achiral bipyridines can induce the SMCI of twocomponent hydrogels, which was collectively confirmed by a combination of CD, vibrational circular dichroism (VCD), and SEM measurements (Fig.…”

“…Recently, Zhang et al revealed that the addition of achiral dopants can influence the chirality transfer and even induce the helicity inversion of the resultant micro-/nano-structured co-crystals assembled from the charge-transfer complex of chiral 7 H -dibenzo[ c , g ]-carbazole and achiral 7,7,8,8-tetracyano-quinodimethane. 58…”