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Excited-State Dynamics of Pentacene Derivatives with Stable Radical Substituents^†

Dr. Akitaka Ito

Division of Molecular Materials Science, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585 (Japan)

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Akihiro Shimizu,

Akihiro Shimizu

Division of Molecular Materials Science, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585 (Japan)

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Noriaki Kishida,

Noriaki Kishida

Division of Molecular Materials Science, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585 (Japan)

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Yusuke Kawanaka,

Yusuke Kawanaka

Division of Molecular Materials Science, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585 (Japan)

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Dr. Daisuke Kosumi,

Dr. Daisuke Kosumi

OCARINA, Osaka City University (Japan)

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Prof. Dr. Hideki Hashimoto,

Prof. Dr. Hideki Hashimoto

OCARINA, Osaka City University (Japan)

Division of Mathematics and Physics, Osaka City University (Japan)

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Prof. Dr. Yoshio Teki,

Corresponding Author

Prof. Dr. Yoshio Teki

[email protected]

Division of Molecular Materials Science, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585 (Japan)

Division of Molecular Materials Science, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585 (Japan)Search for more papers by this author

Dr. Akitaka Ito,

Dr. Akitaka Ito

Division of Molecular Materials Science, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585 (Japan)

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Akihiro Shimizu,

Akihiro Shimizu

Division of Molecular Materials Science, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585 (Japan)

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Noriaki Kishida,

Noriaki Kishida

Division of Molecular Materials Science, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585 (Japan)

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Yusuke Kawanaka,

Yusuke Kawanaka

Division of Molecular Materials Science, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585 (Japan)

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Dr. Daisuke Kosumi,

Dr. Daisuke Kosumi

OCARINA, Osaka City University (Japan)

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Prof. Dr. Hideki Hashimoto,

Prof. Dr. Hideki Hashimoto

OCARINA, Osaka City University (Japan)

Division of Mathematics and Physics, Osaka City University (Japan)

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Prof. Dr. Yoshio Teki,

Corresponding Author

Prof. Dr. Yoshio Teki

[email protected]

Division of Molecular Materials Science, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585 (Japan)

Division of Molecular Materials Science, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585 (Japan)Search for more papers by this author

First published: 30 April 2014

https://doi.org/10.1002/anie.201310291

Citations: 48

^†

This work was partly supported by a Grant-in-Aid from the Japan Society for the Promotion of Science (JSPS) for Scientific Research (B) under Grant Number 24350076 (to Y.T.).

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Graphical Abstract

The state of play: Enhanced intersystem crossing (ISC) and singlet fission have been shown to occur in pentacene (Pn) derivatives with stable radical substituents. These effects result in the ultrafast formation of a triplet excited state in the pentacene moiety from a photoexcited singlet state, even in dilute solution. The excited-state dynamics of the derivatives were evaluated in detail through transient absorption measurements.

Abstract

The excited-state dynamics of pentacene derivatives with stable radical substituents were evaluated in detail through transient absorption measurements. The derivatives showed ultrafast formation of triplet excited state(s) in the pentacene moiety from a photoexcited singlet state through the contributions of enhanced intersystem crossing and singlet fission. Detailed kinetic analyses for the transient absorption data were conducted to quantify the excited-state characteristics of the derivatives.

Supporting Information

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Volume53, Issue26

June 23, 2014

Pages 6715-6719

Excited-State Dynamics of Pentacene Derivatives with Stable Radical Substituents^†

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Excited-State Dynamics of Pentacene Derivatives with Stable Radical Substituents†

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Excited-State Dynamics of Pentacene Derivatives with Stable Radical Substituents^†