Dynamic nuclear polarization by electron spins in the photoexcited triplet state: 1. Attainment of proton polarization of 0.7 at 105 K in naphthalene
Dynamic nuclear polarization by electron spins in the photoexcited triplet state: 1. Attainment of proton polarization of 0.7 at 105 K in naphthalene
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DOI：
10.1143/jpsj.73.2313
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发表时间：
2004-08-01
影响因子：
1.7
通讯作者：
Terao, T
中科院分区：
文献类型：
--
作者：
Takeda, K;Takegoshi, K;Terao, T
利用光激三态电子自旋的动态核极化，在0.32 T、105k条件下获得了高H-1极化0.7。在0.018 mol%掺五苯萘的单晶样品中，H-1极化被建立到该方法所能达到的极值，与热平衡极化相比，H-1极化增强了2.1 x 10(5)倍。讨论了该方法的实验策略和可能的应用以及扩展。
A high H-1 polarization of 0.7 is attained at 105 K in a 0.32 T field by dynamic nuclear polarization using electron spins in the photoexcited triplet state. In a single crystal sample of 0.018 mol% pentacene-doped naphthalene, the H-1 polarization is built up to the ultimate value attainable by this method, corresponding to a 2.1 x 10(5)-fold enhancement of H-1 polarization as compared to the thermal equilibrium polarization. The experimental strategies and possible applications as well as extensions of this approach are discussed.