Negoro Makoto, Kagawa Akinori, Tateishi Kenichiro, Tanaka Yoshiki, Yuasa Tomohiro, Takahashi Keigo, Kitagawa Masahiro
Graduate School of Engineering Science , Osaka University , Toyonaka, Osaka 560-8531 , Japan.
PRESTO, Japan Science and Technology Agency (JST) , Kawaguchi, Saitama 332-0012 , Japan.
J Phys Chem A. 2018 May 3;122(17):4294-4297. doi: 10.1021/acs.jpca.8b01415. Epub 2018 Apr 19.
Dissolution dynamic nuclear polarization (DNP) has recently gained attention as a method to enhance the sensitivity of liquid NMR spectroscopy and MRI. We demonstrate dissolution of the sample hyperpolarized by DNP using photoexcited triplet electrons in 0.38 T at room temperature. The achieved polarization of 0.8% is 6100 times as high as that at thermal equilibrium under the condition. The result is an important step for DNP using photoexcited triplet electrons to become widely used in chemical and biomedical research.
溶解动态核极化（DNP）作为一种提高液体核磁共振光谱和磁共振成像灵敏度的方法，最近受到了关注。我们展示了在室温下，利用光激发三线态电子在0.38 T磁场中实现了经DNP超极化的样品的溶解。在该条件下，实现的0.8%的极化率比热平衡时高6100倍。这一结果是利用光激发三线态电子的DNP在化学和生物医学研究中得到广泛应用的重要一步。
