@article{add0e349166c435eb30365b6e8384f6c,
title = "Heat-Triggered Crystallization of Liquid Crystalline Macrocycles Allowing for Conductance Switching through Hysteretic Thermal Phase Transitions",
abstract = "A polymesomorphic thermal phase-transition of a macrocyclic amphiphile consisting of aromatic groups and oligoethylene glycol (OEG) chains is reported. The macrocyclic amphiphile exists in a highly-ordered liquid crystal (LC) phase at room temperature. Upon heating, this macrocycle shows phase-transition from columnar-lamellar to nematic LC phases followed by crystallization before melting. Spectroscopic studies suggest that the thermally induced crystallization is triggered by a conformational change at the OEG chains. Interestingly, while the macrocycle returns to the columnar-lamellar phase after cooling from the isotropic liquid, it retains the crystallinity after cooling from the thermally-induced crystal. Thanks to this bistability, conductance switching was successfully demonstrated. A different macrocyclic amphiphile also shows an analogous phase-transition behavior, suggesting that this molecular design is universal for developing switchable and memorizable materials, by means of hysteretic phase-transition processes.",
keywords = "amphiphiles, isomerization, liquid crystals, macrocycles, polymorphisms",
author = "Takahiro Muraoka and Tatsuya Shima and Takashi Kajitani and Norihisa Hoshino and Estelle Morvan and Axelle Gr{\'e}lard and Dufourc, {Erick J.} and Takanori Fukushima and Tomoyuki Akutagawa and Kota Nabeya and Kazushi Kinbara",
note = "Funding Information: We thank Prof. A. Muramatsu (Tohoku Univ.) and Prof. K. Kanie (Tohoku Univ.) for their support in POM, DSC, SAXS measurements and fruitful discussion. The synchrotron XRD experiments were performed at the BL45XU in the SPring-8 with the approval of the RIKEN SPring-8 Center (proposal no. 20160027). This work was partially supported by Grant-in-Aid for Scientific Research on Innovative Areas ?Molecular Engine (No.8006)? (18H05419 and 18H05418 to KK), Grant-in-Aid for Scientific Research B (16H04129 to KK), Grant-in-Aid for Scientific Research on Innovative Areas ??-System Figuration (No.2601)? (26102001 to TM, TF and TA), Grant-in-Aid for Young Scientists A (17H04885 to TM), JST PRESTO program ?Molecular Technology and Creation of New Functions? (to TM), and the Management Expenses Grants for National Universities Corporations from MEXT. This work was performed under the Cooperative Research Program of ?Network Joint Research Center for Materials and Devices.? Funding Information: We thank Prof. A. Muramatsu (Tohoku Univ.) and Prof. K. Kanie (Tohoku Univ.) for their support in POM, DSC, SAXS measurements and fruitful discussion. The synchrotron XRD experiments were performed at the BL45XU in the SPring-8 with the approval of the RIKEN SPring-8 Center (proposal no. 20160027). This work was partially supported by Grant-in-Aid for Scientific Research on Innovative Areas “Molecular Engine (No.8006)” (18H05419 and 18H05418 to KK), Grant-in-Aid for Scientific Research B (16H04129 to KK), Grant-in-Aid for Scientific Research on Innovative Areas “p-System Figuration (No.2601)” (26102001 to TM, TF and TA), Grant-in-Aid for Young Scientists A (17H04885 to TM), JST PRESTO program “Molecular Technology and Creation of New Functions” (to TM), and the Management Expenses Grants for National Universities Corporations from MEXT. This work was performed under the Cooperative Research Program of “Network Joint Research Center for Materials and Devices.” Publisher Copyright: {\textcopyright} 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim",
year = "2019",
month = jan,
day = "4",
doi = "10.1002/asia.201801372",
language = "English",
volume = "14",
pages = "141--148",
journal = "Chemistry - An Asian Journal",
issn = "1861-4728",
publisher = "John Wiley and Sons Ltd",
number = "1",
}