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Title
Japanese: 
English:Heat-Triggered Crystallization of Liquid Crystalline Macrocycles Allowing for Conductance Switching through Hysteretic Thermal Phase Transitions 
Author
Japanese: Takahiro Muraoka, Tatsuya Shima, 梶谷 孝, Norihisa Hoshino, Estelle Morvan, Axelle Grélard, Eric J. Dufourc, 福島 孝典, 芥川 智行, Kota Nabeya, Kazushi Kiinbara.  
English: Takahiro Muraoka, Tatsuya Shima, Takashi Kajitani, Norihisa Hoshino, Estelle Morvan, Axelle Grélard, Eric J. Dufourc, Takanori Fukushima, Tomoyuki Akutagawa, Kota Nabeya, Kazushi Kiinbara.  
Language English 
Journal/Book name
Japanese: 
English:Chemistry - An Asian Journal 
Volume, Number, Page Volume 14    Issue 1    Page 141-148
Published date Oct. 29, 2018 
Publisher
Japanese: 
English: 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
Official URL https://onlinelibrary.wiley.com/doi/10.1002/asia.201801372
 
DOI https://doi.org/10.1002/asia.201801372
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 highly‐ordered 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 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.

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