State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Center for Magnetic Resonance, Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, Wuhan 430071, China.
J Magn Reson. 2010 Oct;206(2):269-73. doi: 10.1016/j.jmr.2010.07.009. Epub 2010 Jul 17.
We show that the S-RESPDOR NMR method can be used to measure distances between spin-1/2 and half-integer quadrupolar nuclei, and that a general analytical formula describes its dephasing curve for all spin values. We demonstrate the method on the C4-O4 spin pair of L-tyrosine·HCl, with 13C natural abundance and 30% 17O enrichment, using a moderate magnetic field (9.4 T), a moderate 17O rf-field (40 kHz) and a fast spinning speed (22 kHz). It is shown that S-RESPDOR is much more robust and accurate than previous methods.
我们表明，S-RESPDOR NMR 方法可用于测量自旋-1/2 和半整数 quadrupolar 核之间的距离，并且一般分析公式可描述其所有自旋值的退相曲线。我们使用中等磁场（9.4 T）、中等 17O rf 场（40 kHz）和快速旋转速度（22 kHz），在 L-酪氨酸·HCl 的 C4-O4 自旋对上，用 13C 天然丰度和 30% 17O 富集，证明了该方法。结果表明，S-RESPDOR 比以前的方法更稳健、更准确。
