論文

査読有り
2019年9月12日

Ferroelectricity of a Tetraphenylporphyrin Derivative Bearing -CONHC<inf>14</inf>H<inf>29</inf> Chains at 500 K

Journal of Physical Chemistry C
  • Jianyun Wu
  • ,
  • Takashi Takeda
  • ,
  • Norihisa Hoshino
  • ,
  • Yasutaka Suzuki
  • ,
  • Jun Kawamata
  • ,
  • Tomoyuki Akutagawa

123
36
開始ページ
22439
終了ページ
22446
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1021/acs.jpcc.9b03866

© 2019 American Chemical Society. Optical properties of porphyrin derivatives were used to fabricate an artificial light-harvesting system. The introduction of a N-H···O= hydrogen-bonding alkylamide chain (-CONHCnH2n+1) into a functional π-system is among the useful approaches to design multifunctional supramolecular assemblies. The tetraphenylporphyrin derivative bearing four -CONHC14H29 chains (1) shows the successive and reversible phase transition behavior of S1-S2 at 338 K, S2-Colr at 444 K, and Colr-I (isotropic liquid) at 564 K, where a fluidic discotic rectangular columnar (Colr) liquid crystal phase was observed in a wide temperature range of 444-564 K before melting. The one-dimensional columnar molecular assembly of (1)∞ was constructed using a simultaneous operation of N-H···O= hydrogen-bonding and π-stacking interactions. Temperature (T)- and frequency (f)-dependent dielectric constants of 1 indicated characteristic dielectric enhancement at higher-T and lower-f conditions above 500 K because of the thermally activated motional freedom of the polar N-H···O= hydrogen-bonding unit in the Colr phase. The polarization-electric field (P-E) curves at f = 0.1 Hz clearly indicated ferroelectric hysteresis behavior with a remanent polarization (Pr) of 1 μC cm-2 and a coercive electric field (Ec) of 2 V μm-1 at 503 K. The stable operation of the high-T ferroelectrics at approximately 500 K facilitates the potential application of a memory device in a high-T environment.

リンク情報
DOI
https://doi.org/10.1021/acs.jpcc.9b03866
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000486360900064&DestApp=WOS_CPL
URL
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85072639807&origin=inward
ID情報
  • DOI : 10.1021/acs.jpcc.9b03866
  • ISSN : 1932-7447
  • eISSN : 1932-7455
  • SCOPUS ID : 85072639807
  • Web of Science ID : WOS:000486360900064

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