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
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- 巻
- 123
- 号
- 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
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- 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
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- DOI : 10.1021/acs.jpcc.9b03866
- ISSN : 1932-7447
- eISSN : 1932-7455
- SCOPUS ID : 85072639807
- Web of Science ID : WOS:000486360900064