Related Experiment Video
Updated: Jun 11, 2026

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal
Published on: October 31, 2019
Anisotropic and inhomogeneous magnetic interactions observed in all-organic nitroxide radical liquid crystals
Yoshiaki Uchida1, Katsuaki Suzuki, Rui Tamura
1Graduate School of Human and Environmental Studies, Kyoto University, Kyoto 606-8501, Japan. Yoshiaki.Uchida@h02.mbox.media.kyoto-u.ac.jp
Abstract:
An anisotropic and inhomogeneous magnetic interaction (the average spin-spin interaction constant (-)J > 0) was observed in the various liquid crystalline (LC) phases of racemic and nonracemic all-organic radical LC compounds 1a and 1b. We discussed how the LC superstructures induced the magnetic interaction to operate in the LC phases in terms of spin-spin dipole and exchange interactions by means of VT-EPR spectroscopy. The magnitude of the magnetic interaction depended on the type of LC phase, or the superstructure. Furthermore, these radical LC droplets floating on water were commonly attracted to a permanent magnet and moved freely under the influence of this magnet, whereas the crystallized particles of the same compounds never responded to the magnet. The response of the LC droplets to the magnet also varied depending on the type of LC phase, that is, the extent of the magnetic interaction.
Related Concept Videos
π Electron Effects on Chemical Shift: Overview
ortho–para-Directing Activators: –CH3, –OH, –⁠NH2, –OCH3
Electron Paramagnetic Resonance (EPR) Spectroscopy: Organic Radicals
Structure of Amines
Radical Reactivity: Nucleophilic Radicals
Structural Isomerism
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can be...

