Dynamic Nuclear Polarization Using 3D Aromatic Boron Cluster Radicals.

ABSTRACT: A set of two dodecaborate [B₁₂(OR)₁₂]^1- radical cluster anions containing a dense layer of fluorinated end-groups provides nuclear spin hyperpolarization via the dissolution dynamic nuclear polarization (D-DNP) technique. We show that these clusters can enhance ¹⁹F nuclear magnetic resonance (NMR) signals. Importantly, given the inherent radical delocalization in dodecaborate-based clusters, these species are compatible with reactive compounds such as Lewis acids, providing ∼1000-2000 times of signal enhancement for B(C₆F₅)₃ in liquid state NMR spectroscopy experiments at 9.4 Tesla. This observation suggests that 3D aromatic radicals can provide advantages over the conventional radical species that are currently u

SUBMITTER: Kim Y 

PROVIDER: S-EPMC8078168 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature