We describe the multinuclear detection of nuclear spin optical rotation (NSOR), an effect dependent on the hyperfine interaction between nuclear spins and electrons. Signals of ¹H and ¹⁹F are discriminated by frequency in a single spectrum acquired at sub-millitesla field. The simultaneously acquired optical signal along with the nuclear magnetic resonance signal allows the calculation of the relative magnitude of the NSOR constants corresponding to different nuclei within the sample molecules. This is illustrated by a larger NSOR signal measured at the ¹⁹F frequency despite a smaller corresponding spin concentration. Second, it is shown that heteronuclear J-coupling is observable in the NSOR signal, which can be used to retrieve chemical information. Multinuclear frequency and J resolution can localize optical signals in the molecule. Properties of electronic states at multiple sites in a molecule may therefore ultimately be determined by frequency-resolved NSOR spectroscopy at low field.

中文翻译：

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低场核自旋旋光的多核检测

我们描述了核自旋旋光（NSOR）的多核检测，这种效应取决于核自旋与电子之间的超精细相互作用。¹ H和¹⁹ F的信号通过在次毫特里斯拉场获得的单个频谱中的频率来区分。同时获取的光信号和核磁共振信号允许计算与样品分子内不同原子核相对应的NSOR常数的相对大小。尽管相应的自旋浓度较小，但在¹⁹ F频率下测得的较大NSOR信号说明了这一点。其次，表明异核J在NSOR信号中可以观察到-偶联，其可以用于检索化学信息。多核频率和J分辨率可以在分子中定位光信号。因此，分子中多个位点的电子态性质最终可以通过低场的频率分辨NSOR光谱法确定。