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

Tomonori Ono, Kaoru Kawasaki, Keiji Tanaka, Toshihiko Nagamura

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)523-533
Number of pages11
Journalpolymer
Volume116
DOIs
Publication statusPublished - May 5 2017

Fingerprint

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

Cite this

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

In: polymer, Vol. 116, 05.05.2017, p. 523-533.

Research output: Contribution to journalArticle

Ono, Tomonori ; Kawasaki, Kaoru ; Tanaka, Keiji ; Nagamura, Toshihiko. / Ultrafast photoresponsive materials for all-optical light modulation by polymer thin films. In: polymer. 2017 ; Vol. 116. pp. 523-533.
@article{a89485da53ba426c891cc3aba4bc191e,
title = "Ultrafast photoresponsive materials for all-optical light modulation by polymer thin films",
abstract = "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.",
author = "Tomonori Ono and Kaoru Kawasaki and Keiji Tanaka and Toshihiko Nagamura",
year = "2017",
month = "5",
day = "5",
doi = "10.1016/j.polymer.2017.02.051",
language = "English",
volume = "116",
pages = "523--533",
journal = "Polymer",
issn = "0032-3861",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - Ultrafast photoresponsive materials for all-optical light modulation by polymer thin films

AU - Ono, Tomonori

AU - Kawasaki, Kaoru

AU - Tanaka, Keiji

AU - Nagamura, Toshihiko

PY - 2017/5/5

Y1 - 2017/5/5

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85014042591&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85014042591&partnerID=8YFLogxK

U2 - 10.1016/j.polymer.2017.02.051

DO - 10.1016/j.polymer.2017.02.051

M3 - Article

AN - SCOPUS:85014042591

VL - 116

SP - 523

EP - 533

JO - Polymer

JF - Polymer

SN - 0032-3861

ER -