Magnetic Resonance (Feb 2021)
Room-temperature hyperpolarization of polycrystalline samples with optically polarized triplet electrons: pentacene or nitrogen-vacancy center in diamond?
- K. Miyanishi,
- T. F. Segawa,
- T. F. Segawa,
- K. Takeda,
- I. Ohki,
- S. Onoda,
- S. Onoda,
- T. Ohshima,
- T. Ohshima,
- H. Abe,
- H. Abe,
- H. Takashima,
- S. Takeuchi,
- A. I. Shames,
- K. Morita,
- Y. Wang,
- F. T.-K. So,
- F. T.-K. So,
- D. Terada,
- D. Terada,
- R. Igarashi,
- R. Igarashi,
- R. Igarashi,
- A. Kagawa,
- A. Kagawa,
- A. Kagawa,
- M. Kitagawa,
- M. Kitagawa,
- N. Mizuochi,
- M. Shirakawa,
- M. Shirakawa,
- M. Negoro,
- M. Negoro,
- M. Negoro
Affiliations
- K. Miyanishi
- Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
- T. F. Segawa
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-Ku, Kyoto 615-8510, Japan
- T. F. Segawa
- Laboratory for Solid State Physics, ETH Zurich, 8093 Zurich, Switzerland
- K. Takeda
- Division of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
- I. Ohki
- Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
- S. Onoda
- Institute for Quantum Life Science, National Institutes for Quantum and Radiological Science and Technology, 4-9-1, Anagawa, Inage-Ku, Chiba 263-8555, Japan
- S. Onoda
- Takasaki Advanced Radiation Research Institute, National Institutes for Quantum and Radiological Science and Technology, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan
- T. Ohshima
- Institute for Quantum Life Science, National Institutes for Quantum and Radiological Science and Technology, 4-9-1, Anagawa, Inage-Ku, Chiba 263-8555, Japan
- T. Ohshima
- Takasaki Advanced Radiation Research Institute, National Institutes for Quantum and Radiological Science and Technology, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan
- H. Abe
- Institute for Quantum Life Science, National Institutes for Quantum and Radiological Science and Technology, 4-9-1, Anagawa, Inage-Ku, Chiba 263-8555, Japan
- H. Abe
- Takasaki Advanced Radiation Research Institute, National Institutes for Quantum and Radiological Science and Technology, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan
- H. Takashima
- Department of Electronic Science and Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
- S. Takeuchi
- Department of Electronic Science and Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
- A. I. Shames
- Department of Physics, Ben-Gurion University of the Negev, 8410501 Beer-Sheva, Israel
- K. Morita
- Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
- Y. Wang
- Division of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
- F. T.-K. So
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-Ku, Kyoto 615-8510, Japan
- F. T.-K. So
- Institute for Quantum Life Science, National Institutes for Quantum and Radiological Science and Technology, 4-9-1, Anagawa, Inage-Ku, Chiba 263-8555, Japan
- D. Terada
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-Ku, Kyoto 615-8510, Japan
- D. Terada
- Institute for Quantum Life Science, National Institutes for Quantum and Radiological Science and Technology, 4-9-1, Anagawa, Inage-Ku, Chiba 263-8555, Japan
- R. Igarashi
- Institute for Quantum Life Science, National Institutes for Quantum and Radiological Science and Technology, 4-9-1, Anagawa, Inage-Ku, Chiba 263-8555, Japan
- R. Igarashi
- Takasaki Advanced Radiation Research Institute, National Institutes for Quantum and Radiological Science and Technology, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan
- R. Igarashi
- JST, PRESTO, Kawaguchi, Japan
- A. Kagawa
- Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
- A. Kagawa
- JST, PRESTO, Kawaguchi, Japan
- A. Kagawa
- Center for Quantum Information and Quantum Biology, Institute for Open and Transdisciplinary Research Initiatives, Osaka University, 1-2 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
- M. Kitagawa
- Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
- M. Kitagawa
- Center for Quantum Information and Quantum Biology, Institute for Open and Transdisciplinary Research Initiatives, Osaka University, 1-2 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
- N. Mizuochi
- Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
- M. Shirakawa
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-Ku, Kyoto 615-8510, Japan
- M. Shirakawa
- Institute for Quantum Life Science, National Institutes for Quantum and Radiological Science and Technology, 4-9-1, Anagawa, Inage-Ku, Chiba 263-8555, Japan
- M. Negoro
- Institute for Quantum Life Science, National Institutes for Quantum and Radiological Science and Technology, 4-9-1, Anagawa, Inage-Ku, Chiba 263-8555, Japan
- M. Negoro
- JST, PRESTO, Kawaguchi, Japan
- M. Negoro
- Center for Quantum Information and Quantum Biology, Institute for Open and Transdisciplinary Research Initiatives, Osaka University, 1-2 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
- DOI
- https://doi.org/10.5194/mr-2-33-2021
- Journal volume & issue
-
Vol. 2
pp. 33 – 48
Abstract
We demonstrate room-temperature 13C hyperpolarization by dynamic nuclear polarization (DNP) using optically polarized triplet electron spins in two polycrystalline systems: pentacene-doped [carboxyl-13C] benzoic acid and microdiamonds containing nitrogen-vacancy (NV−) centers. For both samples, the integrated solid effect (ISE) is used to polarize the 13C spin system in magnetic fields of 350–400 mT. In the benzoic acid sample, the 13C spin polarization is enhanced by up to 0.12 % through direct electron-to-13C polarization transfer without performing dynamic 1H polarization followed by 1H−13C cross-polarization. In addition, the ISE has been successfully applied to polarize naturally abundant 13C spins in a microdiamond sample to 0.01 %. To characterize the buildup of the 13C polarization, we discuss the efficiencies of direct polarization transfer between the electron and 13C spins as well as that of 13C−13C spin diffusion, examining various parameters which are beneficial or detrimental for successful bulk dynamic 13C polarization.
