Ultrafast photoresponsive materials for all-optical light modulation by polymer thin films

Tomonori Ono, Kaoru Kawasaki, Keiji Tanaka, Toshihiko Nagamura

研究成果: ジャーナルへの寄稿記事

2 引用 (Scopus)

抄録

Ultrafast and single exponential responsive materials were achieved by encapsulating donor-acceptor linked molecules into cucurbitunitl[8], CB[8], as nanocavity hosts. Various aromatic groups were linked with various types of 4,4′-bipyridinium groups through propyloxy linker. They showed characteristic charge-transfer (CT) absorption with specific colors in aqueous solutions. Upon addition of CB[8], they showed remarkably different colors due to intramolecular CT complex formation in CB[8]. Upon femtosecond laser excitation of CT band extremely fast electron transfer occurred from a donor to an acceptor unit accompanying new absorption in the visible to near-infrared region due mainly to photoreduced bipyridinium derivatives. Thermal back electron transfer reactions in CB[8] were found to follow a single exponential decay with rate constants ranging more than two orders depending on the combination of a donor and an acceptor unit. Their rate constants vs. free energy changes for oxidized donors and reduced acceptors in linked molecules were expressed by the Marcus theory.

元の言語英語
ページ(範囲)523-533
ページ数11
ジャーナルpolymer
116
DOI
出版物ステータス出版済み - 5 5 2017

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Light modulation
Polymer films
Charge transfer
Thin films
Rate constants
Color
Molecules
Laser excitation
Electrons
Ultrashort pulses
Free energy
Infrared radiation
Derivatives

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

これを引用

Ultrafast photoresponsive materials for all-optical light modulation by polymer thin films. / Ono, Tomonori; Kawasaki, Kaoru; Tanaka, Keiji; Nagamura, Toshihiko.

:: polymer, 巻 116, 05.05.2017, p. 523-533.

研究成果: ジャーナルへの寄稿記事

Ono, Tomonori ; Kawasaki, Kaoru ; Tanaka, Keiji ; Nagamura, Toshihiko. / Ultrafast photoresponsive materials for all-optical light modulation by polymer thin films. :: polymer. 2017 ; 巻 116. pp. 523-533.
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