H2-decoupling-accelerated H1 spin diffusion in dynamic nuclear polarization with photoexcited triplet electrons

Negoro, M.; Nakayama, K.; Tateishi, K.; Kagawa, A.; Takeda, K.; Kitagawa, M.

doi:https://doi.org/10.1063/1.3493453

H2-decoupling-accelerated H1 spin diffusion in dynamic nuclear polarization with photoexcited triplet electrons

Negoro, M.; Nakayama, K.; Tateishi, K. et al.

Journal of Chemical Physics, 2010, 133(15), 154504

Number of Access:874（2025-09-07 23:17 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/77650

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Title	H2-decoupling-accelerated H1 spin diffusion in dynamic nuclear polarization with photoexcited triplet electrons
Creator	NRID 1000070611549 1000070611549 researchmap permalink DNPne56 DNPne56 Scopus Author ID 36553027400 36553027400 CreatorName Negoro, M.
	NRID 1000090596652 1000090596652 CreatorName Nakayama, K.
	NRID 1000080709220 1000080709220 CreatorName Tateishi, K.
	NRID 1000070533701 1000070533701 Scopus Author ID 8326938500 8326938500 CreatorName Kagawa, A.
	NRID 1000020379308 1000020379308 CreatorName Takeda, K.
	NRID 1000020252629 1000020252629 ORCID 0000-0002-7434-6472 0000-0002-7434-6472 researchmap permalink read0079549 read0079549 Scopus Author ID 8326938600 8326938600 CreatorName Kitagawa, M.
Description	This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in M. Negoro, K. Nakayama, K. Tateishi, A. Kagawa, K. Takeda, and M. Kitagawa, J. Chem. Phys. 133, 154504 (2010) and may be found at https://doi.org/10.1063/1.3493453.
Abstract	In dynamic nuclear polarization (DNP) experiments applied to organic solids for creating nonequilibrium, high H1 spin polarization, an efficient buildup of H1 polarization is attained by partially deuterating the material of interest with an appropriate H1 concentration. In such a dilute H1 spin system, it is shown that the H1 spin diffusion rate and thereby the buildup efficiency of H1 polarization can further be enhanced by continually applying radiofrequency irradiation for deuterium decoupling during the DNP process. As experimentally confirmed in this work, the electron spin polarization of the photoexcited triplet state is mainly transferred only to those H1 spins, which are in the vicinity of the electron spins, and H1 spin diffusion transports the localized H1 polarization over the whole sample volume. The H1 spin diffusion coefficients are estimated from DNP repetition interval dependence of the initial buildup rate of H1 polarization, and the result indicates that the spin diffusion coefficient is enhanced by a factor of 2 compared to that without H2 decoupling.
Publisher	AIP Publishing
Source Title	Journal of Chemical Physics
Volume (Issue)	133(15)
Page	154504
Date of Issued	2010-10-21
Language	English
Handle URL	https://hdl.handle.net/11094/77650
PISSN	00219606
eISSN	10897690
NCID	AA00694991
Relation.isIdenticalTo	DOI (Publisher Version) https://doi.org/10.1063/1.3493453
Access Rights	open access
oaire:version	Version of Record
Category	学術雑誌論文 Journal Article

Resource Type	journal article
Local Type	Journal Article
DCMI Type	Text
DCTERMS.bibliographicCitation	Journal of Chemical Physics. 2010, 133(15), p. 154504
DC.title	H2-decoupling-accelerated H1 spin diffusion in dynamic nuclear polarization with photoexcited triplet electrons
DC.creator	Negoro, M.
	Nakayama, K.
	Tateishi, K.
	Kagawa, A.
	Takeda, K.
	Kitagawa, M.
DC.publisher	AIP Publishing
DC.language' scheme='DCTERMS.RFC1766	English
DC.type' scheme='DCTERMS.DCMIType	Text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2010-10-21
DC.identifier	https://doi.org/10.1063/1.3493453
DC.description	This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in M. Negoro, K. Nakayama, K. Tateishi, A. Kagawa, K. Takeda, and M. Kitagawa, J. Chem. Phys. 133, 154504 (2010) and may be found at https://doi.org/10.1063/1.3493453.
DCTERMS.abstract	In dynamic nuclear polarization (DNP) experiments applied to organic solids for creating nonequilibrium, high H1 spin polarization, an efficient buildup of H1 polarization is attained by partially deuterating the material of interest with an appropriate H1 concentration. In such a dilute H1 spin system, it is shown that the H1 spin diffusion rate and thereby the buildup efficiency of H1 polarization can further be enhanced by continually applying radiofrequency irradiation for deuterium decoupling during the DNP process. As experimentally confirmed in this work, the electron spin polarization of the photoexcited triplet state is mainly transferred only to those H1 spins, which are in the vicinity of the electron spins, and H1 spin diffusion transports the localized H1 polarization over the whole sample volume. The H1 spin diffusion coefficients are estimated from DNP repetition interval dependence of the initial buildup rate of H1 polarization, and the result indicates that the spin diffusion coefficient is enhanced by a factor of 2 compared to that without H2 decoupling.
DC.format	77650
citation_title	H2-decoupling-accelerated H1 spin diffusion in dynamic nuclear polarization with photoexcited triplet electrons
citation_author	Negoro, M.
	Nakayama, K.
	Tateishi, K.
	Kagawa, A.
	Takeda, K.
	Kitagawa, M.
citation_publisher	AIP Publishing
citation_language	English
citation_date	2010-10-21
citation_journal_title	Journal of Chemical Physics
citation_volume	133
citation_issue	15
citation_firstpage	154504
citation_doi	https://doi.org/10.1063/1.3493453
citation_public_url	https://hdl.handle.net/11094/77650

H2-decoupling-accelerated H1 spin diffusion in dynamic nuclear polarization with photoexcited triplet electrons

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