Organic Chiral Charge Transfer Magnets

Abstract

In this work, through designing organic helix donor–acceptor complexes, one type of room-temperature chiral magnet was reported. Within these chiral charge transfer magnets, circularly polarized light could induce a larger saturation magnetization compared to linearly polarized light illumination with identical intensity. Moreover, the transmission light polarization from chiral magnets could be tuned via applying the magnetic field. Overall, room-temperature organic chiral magnets with optomagnetic effects will enhance the function of organic magnetochiral materials.

Strong Enhancement of π‐Electron Donor/Acceptor Ability by Complementary DD/AA Hydrogen Bonding

“…[8a, 25] Furthermore,t he latter two are enantiomorphic,w hich could give rise to intriguing optomagnetic effects,w hich are particularly relevant for the CT systems. [26] Theh ydrogen bonds in the co-crystals display ah igh directionality when docking IC with the o-quinones in the geometry predicted by gas-phase DFT calculations.T he complexes are mostly planar with minor translational and rotational distortions,m ost significant in IC-Diaza and the solvent-incorporating IC-Dioxin (Figure 4). Thea verage length of the hydrogen bonds (NÀH···O=C) in all co-crystals is between 2.00 and 2.11 ,which is slightly longer (by 0.03-0.12 )t han the DFT-predicted values of the individual complexes in the gas phase (Table S7), although this can be explained by the tendency of X-ray crystallography to underestimate N À Hb ond lengths.…”

Strong Enhancement of π‐Electron Donor/Acceptor Ability by Complementary DD/AA Hydrogen Bonding

“…Note that IC–PyD (space group Pc ), IC–PhenAnt (space group P 2 1 2 1 2 1 ), and IC–Diaza (space group C 2) are non‐centrosymmetric and therefore of potential interest for ferroelectric materials . Furthermore, the latter two are enantiomorphic, which could give rise to intriguing optomagnetic effects, which are particularly relevant for the CT systems …”

Organic magnetoelectric and optomagnetic couplings: perspectives for organic spin optoelectronics

“…Linear and circular indicate linear and circular polarization light excitation, respectively. Reproduced from Naaman and Waldeck 113 with permission from Annual Reviews, Inc., Wang et al 65 with permission from the American Physical Society and Gao et al 117 with permission from Wiley-VCH.…”