Department of Physics, The City College of New York, CUNY, 138th Street and Convent Avenue, New York, New York 10031, USA.
J Chem Phys. 2010 Oct 21;133(15):154505. doi: 10.1063/1.3502484.
We report on the use of optical Faraday rotation to monitor the nuclear-spin signal in a set of model (19)F- and (1)H-rich fluids. Our approach integrates optical detection with high-field, pulsed NMR so as to record the time-resolved evolution of nuclear-spins after rf excitation. Comparison of chemical-shift-resolved resonances allows us to set order-of-magnitude constrains on the relative amplitudes of hyperfine coupling constants for different bonding geometries. When evaluated against coil induction, the present detection modality suffers from poorer sensitivity, but improvement could be attained via multipass schemes. Because illumination is off-resonant i.e., the medium is optically transparent, this methodology could find extensions in a broad class of fluids and soft condensed matter systems.
我们报告了使用光学法拉第旋转来监测一组富（19）F 和（1）H 模型流体中的核自旋信号。我们的方法将光学检测与高场、脉冲 NMR 集成在一起，以便记录射频激发后核自旋的时间分辨演化。对化学位移分辨共振的比较使我们能够对不同键合几何形状的超精细耦合常数的相对幅度进行数量级约束。与线圈感应相比，目前的检测模式灵敏度较差，但通过多通方案可以提高灵敏度。由于照明是非共振的，即介质是光学透明的，因此这种方法可以在广泛的流体和软凝聚态系统中得到扩展。
