Dynamic nuclear polarization with photo-excited triplet electrons using 6,13-diphenylpentacene

Kenichiro Tateishi; Makoto Negoro; Hiroshi Nonaka; Akinori Kagawa; Shinsuke Sando; Satoshi Wada; Masahiro Kitagawa; Tomohiro Uesaka

doi:10.1039/C9CP00977A

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Dynamic nuclear polarization with photo-excited triplet electrons using 6,13-diphenylpentacene

Kenichiro Tateishi,

*^ab Makoto Negoro,^cd Hiroshi Nonaka,

^f Akinori Kagawa,^cde Shinsuke Sando,

^f Satoshi Wada,^gh Masahiro Kitagawa^ce and Tomohiro Uesaka^ab

Author affiliations

* Corresponding authors

^a Cluster for Pioneering Research, RIKEN, Saitama 351-0198, Japan
E-mail: kenichiro.tateishi@riken.jp

^b Nishina Center for Accelerator-Based Science, RIKEN, Saitama 351-0198, Japan

^c Quantum Information and Quantum Biology Division, Institute for Open and Transdisciplinary Research Initiatives, Osaka University, Osaka 560-8531, Japan

^d JST, PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan

^e Graduate School of Engineering Science, Osaka University, Osaka 560-8531, Japan

^f Graduate School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan

^g Center for Advanced Photonics, RIKEN, Saitama 351-0198, Japan

^h Megaopto Co., Ltd., Saitama 351-0104, Japan

Abstract

Dynamic nuclear polarization with photo-excited triplet electrons (Triplet-DNP) is demonstrated using 6,13-diphenylpentacene (DPPentacene). DPPentacene is soluble in various organic solvents, while pentacene, which is used in most of the triplet-DNP experiments, has limited solubility. An enhancement factor of 81 is obtained for ¹H spins in the glass of ethanol-d₆ : water = 80 : 20 (w/w) doped with 0.1 mM DPPentacene at 90 K in 0.67 T.

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Article information

DOI: https://doi.org/10.1039/C9CP00977A
Article type: Communication
Submitted: 17 Jun 2019
Accepted: 21 Aug 2019
First published: 09 Sep 2019

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Phys. Chem. Chem. Phys., 2019,21, 19737-19741

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Dynamic nuclear polarization with photo-excited triplet electrons using 6,13-diphenylpentacene

K. Tateishi, M. Negoro, H. Nonaka, A. Kagawa, S. Sando, S. Wada, M. Kitagawa and T. Uesaka, Phys. Chem. Chem. Phys., 2019, 21, 19737 DOI: 10.1039/C9CP00977A

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Physical Chemistry Chemical Physics

Dynamic nuclear polarization with photo-excited triplet electrons using 6,13-diphenylpentacene

Abstract

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Dynamic nuclear polarization with photo-excited triplet electrons using 6,13-diphenylpentacene

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