2004年8月
Dynamic nuclear polarization by electron spins in the photoexcited triplet state: II. High polarization of the residual protons in deuterated naphthalene
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
- ,
- ,
- 巻
- 73
- 号
- 8
- 開始ページ
- 2319
- 終了ページ
- 2322
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1143/JPSJ.73.2319
- 出版者・発行元
- PHYSICAL SOC JAPAN
Experiments of dynamic nuclear polarization by electron spins in the photoexcited triplet state were made using single crystal and polycrystalline samples of 99.21%-deuterated naphthalene doped with 0.015 mol% pentacene. In the single crystal sample, the polarization of the residual protons was built up to 0.7 at 105 K, reaching the ultimate polarization equal to the photo-induced electron spin polarization. A doublet due to the two protons which happen to be adjacent to each other in a deuterated naphthalene molecule was observed in the single crystal under deuteron double-quantum decoupling; it exhibits polarization-induced asymmetry when observed by a small-tip angle pulse. In the polycrystalline sample the resultant H-1 polarization was 0.033. The H-1 NMR lineshape under deuteron decoupling in the single crystal and the inhomogeneous H-1 distribution in a deuterated naphthalene molecule are discussed.
- リンク情報
- ID情報
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- DOI : 10.1143/JPSJ.73.2319
- ISSN : 0031-9015
- CiNii Articles ID : 110001954972
- Web of Science ID : WOS:000223630900046