title: Broad temperature range of cubic blue phase present in simple binary mixture systems containing rodlike Schiff base mesogens with tolane moiety.
abstract: Four simple rodlike Schiff base mesogens with tolane moiety were synthesized and applied to stabilize cubic blue phases (BPs) in simple binary mixture systems for the first time. When the chiral additive or was added into a chiral salicylaldimine-based compound, the temperature range of the cubic BP could be extended by more than 20 °C. However, when the chiral Schiff base mesogen was blended with chiral dopant possessing opposite handedness, , BPs could not be observed. Interestingly, the widest temperature range of the cubic BPs (∼35 °C) could be induced by adding the rodlike chiral dopant or into the rodlike racemic Schiff base mesogen with hydroxyl group. On the basis of our experimental results and molecular modeling, the appearance and temperature range of the BPs are affected by the dipole moment and the biaxiality of the molecular geometry. Accordingly, we demonstrated that the hydroxyl group and the methyl branch in this type of Schiff base mesogen play an important role in the stabilization of BPs.
authors.affiliation: Department of Chemical Engineering, Tatung University, Taipei 104, Taiwan. chchhuang@ttu.edu.tw.
authors.forename: Chiung-Cheng
authors.initials: CC
authors.lastname: Huang
authors.affiliation: Department of Chemical Engineering, Tatung University, Taipei 104, Taiwan. chchhuang@ttu.edu.tw.
authors.forename: Yu-Hao
authors.initials: YH
authors.lastname: Chen
authors.affiliation: Department of Chemical Engineering, Tatung University, Taipei 104, Taiwan. chchhuang@ttu.edu.tw.
authors.forename: Sheng-Yen
authors.initials: SY
authors.lastname: Chen
authors.affiliation: Department of Chemical Engineering, Tatung University, Taipei 104, Taiwan. chchhuang@ttu.edu.tw.
authors.forename: Yi-Zeng
authors.initials: YZ
authors.lastname: Sun
authors.affiliation: Department of Chemical Engineering, Tatung University, Taipei 104, Taiwan. chchhuang@ttu.edu.tw.
authors.forename: Zong-Ye
authors.initials: ZY
authors.lastname: Wu
authors.affiliation: Department of Chemical Engineering, Tatung University, Taipei 104, Taiwan. chchhuang@ttu.edu.tw.
authors.forename: Mei-Ching
authors.initials: MC
authors.lastname: Yu
authors.affiliation: Department of Molecular Science and Engineering, National Taipei University of Technology, Taipei 106, Taiwan. ijuihsu@ntut.edu.tw.
authors.forename: Bo-Hao
authors.initials: BH
authors.lastname: Chen
authors.affiliation: Department of Molecular Science and Engineering, National Taipei University of Technology, Taipei 106, Taiwan. ijuihsu@ntut.edu.tw.
authors.forename: I-Jui
authors.initials: IJ
authors.lastname: Hsu
authors.affiliation: National Synchrotron Radiation Research Center of Taiwan, Hsinchu 300, Taiwan.
authors.forename: Lai-Chin
authors.initials: LC
authors.lastname: Wu
authors.affiliation: National Synchrotron Radiation Research Center of Taiwan, Hsinchu 300, Taiwan.
authors.forename: Jey-Jau
authors.initials: JJ
authors.lastname: Lee