Preparation and magnetic properties of nitroxide radical liquid crystalline physical gels. (13th April 2017)

• Record Type: Journal Article
• Authors: Takemoto, Yusa; Uchida, Yoshiaki; Shimono, Satoshi; Yamauchi, Jun; Tamura, Rui
• Is Part Of: Molecular crystals and liquid crystals. Volume 647(2017)
• Page Start: 279
• Page End: 289
• Publication Date: 2017-04-13
• Subjects: Magnetic liquid crystals -- liquid crystalline physical gels -- nitroxide radicals -- positive magneto-LC effects; Molecular crystals -- Periodicals; Liquid crystals -- Periodicals; Liquid crystals; Molecular crystals; Periodicals; 548
• DOI: 10.1080/15421406.2017.1289611
• Languages: English
• ISSNs: 1542-1406

Abstract

ABSTRACT: Liquid crystalline physical gels which consist of a chiral racemic nitroxide radical compound (±)-1 showing a nematic phase and a diamagnetic, chiral organic gelator ( R, R )-2 were prepared to investigate the effects of the gelator on the "positive magneto-LC effects" observed in the nematic phase of (±)-1 and the molecular alignment of (±)-1 in the resulting nematic gels. With the increasing amount of the gelator which decreased the domain size, the molecular reorientation by a magnetic field (0.34 T) was considerably restricted in the nematic gel phase and the intermolecular magnetic interactions (positive magneto-LC effects) increased in the fine and random nematic polydomain structure formed by self-assembled fibers of organic gelator molecules.