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ABSTRACT
A new chiral liquid crystalline nitroxide radical with a terminal trifluoromethoxy group exhibits not only chiral nematic and chiral smectic A phases but also a twist grain boundary phase in the cooling process. The layer order induced by the trifluoromethoxy group seems frustrated with the helical order.
GRAPHICAL ABSTRACT
Acknowledgments
The authors thank Professor Rui Tamura, Kyoto University, for experimental support, including X-ray diffraction measurements.
Disclosure statement
No potential conflict of interest was reported by the authors.
Additional information
Funding
This work was supported in part by the Japan Science and Technology Agency (JST) “Precursory Research for Embryonic Science and Technology (PRESTO)” for a project on “Molecular technology and creation of new function” and by the Japan Society for the Promotion of Science (JSPS) KAKENHI (Grant numbers JP17H04896 and JP20K21226). T. A. is grateful to the JSPS Research Fellowships for Young Scientists JP16J05585. We appreciate Mr. S. Nakagami, Mr. K. Hanada and Mr. Y. Inukai for their experimental support.