Chiral doping effect in the B2 phase of a bent-core liquid crystal: The observation of resonant X-ray satellite peaks assigned to the 5/10 layer periodic structure. (17th March 2015)

• Record Type: Journal Article
• Authors: Takanishi, Yoichi; Ohtsuka, Youko; Takahashi, Yumiko; Kang, Sungmin; Iida, Atsuo
• Is Part Of: Europhysics letters. Volume 109:Number 5(2015:Mar.)
• Publication Date: 2015-03-17
• Subjects: 61.30.-v -- 61.30.Eb -- 61.05.cf; Physics -- Periodicals; Electronic journals; 530.05
• DOI: 10.1209/0295-5075/109/56003
• Languages: English
• ISSNs: 0295-5075

Abstract

Abstract: We studied the details of a local layer structure in the B2 phase of bromo-containing bent-core liquid crystals mixed with a small amount of chiral molecules using microbeam resonant X-ray scattering. In this measurement, we detected the 1 ± 0.2 order satellite peaks, which suggest that the B2 phase of the mixture has a long-range periodic structure. Dielectric and electro-optic measurements indicate almost the same behavior as the antiferroelectric SmCA PA (B2) of pure bromo-containing bent-core liquid crystals, so that the B2 phase of the chiral mixture is also antiferroelectric, and it is concluded that the B2 phase of the chiral mixture forms a ten-layer periodic structure. Such a long-range periodic structure did not appear by mixing the racemate of the same compounds, which indicates the chiral effect on the long-range periodic structure.