title: Synthesis of chiral dopants based on carbohydrates.
abstract: Chiral dopants based on carbohydrates for nematic liquid crystals were synthesized from D-glucose, and their helical twisting power (HTP) values were evaluated. The chiral dopants induced helices in the host nematic liquid crystals. An acetyl derivative having an ether-type glycosidic linkage between carbohydrate and a mesogenic moiety showed the highest HTP value of 10.4 μm(-1), while an acetyl derivative having an anomeric ester-type linkage did not show any HTP. It was surprising that this molecule had no HTP despite the presence of chirality in the molecule. A relationship between HTP and specific rotation was not observed in this study.
authors.affiliation: Division of Material Science, Graduate School of Science and Engineering, Saitama University, Sakura, Saitama 338-8570, Japan.
authors.forename: Toru
authors.initials: T
authors.lastname: Tsuruta
authors.affiliation: Division of Material Science, Graduate School of Science and Engineering, Saitama University, Sakura, Saitama 338-8570, Japan.
authors.forename: Tetsuo
authors.initials: T
authors.lastname: Koyama
authors.affiliation: Division of Material Science, Graduate School of Science and Engineering, Saitama University, Sakura, Saitama 338-8570, Japan.
authors.forename: Mikio
authors.initials: M
authors.lastname: Yasutake
authors.affiliation: Division of Material Science, Graduate School of Science and Engineering, Saitama University, Sakura, Saitama 338-8570, Japan.
authors.forename: Ken
authors.initials: K
authors.lastname: Hatano
authors.affiliation: Division of Material Science, Graduate School of Science and Engineering, Saitama University, Sakura, Saitama 338-8570, Japan. Electronic address: koji@fms.saitama-u.ac.jp.
authors.forename: Koji
authors.initials: K
authors.lastname: Matsuoka
mesh_terms: D002151:Calorimetry; D002241:Carbohydrates / Q000138:chemical synthesis* / Q000737:chemistry; D005947:Glucose / Q000737:chemistry; D050866:Liquid Crystals / Q000737:chemistry*; D015394:Molecular Structure; D012399:Rotation
chemical_list: D002241:Carbohydrates; D005947:Glucose
keywords: Carbohydrate; Chiral dopant; Glucose; HTP; Liquid crystal