Cross polarization from 1H to quadrupolar 6Li nuclei for dissolution DNP

Abstract

Cross polarization from protons to quadrupolar ⁶Li nuclei is combined with dynamic nuclear polarization of protons at 1.2 K and 6.7 T using TEMPOL as a polarizing agent followed by rapid dissolution. Compared to direct ⁶Li DNP without cross-polarization, a higher nuclear spin polarization P(⁶Li) can be obtained in a shorter time. A double resonance ¹H–⁶Li probe was designed that is equipped for Longitudinally Detected Electron Spin Resonance.