Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne, Batochime, Lausanne, Switzerland.
J Magn Reson. 2011 May;210(1):137-40. doi: 10.1016/j.jmr.2011.02.006. Epub 2011 Mar 9.
We report measurements of spin-lattice relaxation of carbon-13 as a function of the magnetic field ('relaxometry') in view of optimizing dissolution-DNP. The sample is temporarily lifted into the stray field above a high-resolution magnet using a simple and inexpensive 'shuttle'. The signals of arbitrary molecules can be observed at high field with high-resolution and sensitivity. During the dissolution process and subsequent 'voyage' from the polarizer to the NMR magnet, relaxation is accelerated by paramagnetic polarizing agents, but it can be quenched by using scavengers.
我们报告了碳-13 的自旋晶格弛豫随磁场变化的测量结果（弛豫测量），以优化溶解-DNP。使用简单且廉价的“穿梭器”将样品临时提升到高分辨率磁体上方的杂散场中。可以在高场中以高分辨率和灵敏度观察任意分子的信号。在溶解过程中和随后从极化器到 NMR 磁体的“航行”过程中，顺磁极化剂会加速弛豫，但可以使用清除剂来猝灭弛豫。
