Dynamical Nuclear Polarization by Pulsed EPR Spectroscopy

T.S.教授林书豪得到了 物理化学实验应用程序 脉冲电子顺磁共振谱 这 技术将被用来研究自旋的机制 从电子自旋到核自旋的极化转移 （动态核极化过程），调用 有机固体的光激发三重态。 三个方面 将调查：共振极化转移通过 集成固体效应，通过 自旋锁定实验和电子-核交叉 水平反交叉区的极化动力学。 的 这些研究的结果预计将提供 信息，这将允许制定的理论， 共振极化转移和交叉极化 过程一般。 %%% 质子核磁共振信号的增强 在某些有机固体中， 与正常信号相比。 如此大的进步， 质子信号的强度可以使研究 在这些低浓度的客体分子的结构 晶体

Professor T.S. Lin is supported by a grant from the Experimental Physical Chemistry Program for the application of pulsed electron paramagnetic resonance spectroscopy. This technique will be used to study the mechanisms of spin polarization transfer from electron spins to nuclear spins (Dynamic Nuclear Polarization processes) which invoke the photo-excited triplet states of organic solids. Three aspects will be investigated: resonance polarization transfer via the integrated solid effect, coherent polarization transfer via the spin locking experiment, and electron-nuclear cross polarization dynamics at the level anticrossing region. The results of these studies are expected to provide the information which will allow formulation of a theory of the resonance polarization transfer and the cross polarization processes in general. %%% The enhancement of the proton nuclear magnetic resonance signal in some organic solids can be as high as a factor of 15,000 compared to the normal signal. Such a large improvement in the intensities of the proton signals could allow the studies of structures of guest molecules at low concentrations in these crystals.