ArticleNature communications2026
Rotational observation of kinetically hindered neutral radical pairs.
Article in Nature communications, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Probing the molecular structure of radical pairs has remained challenging because of their short lifetimes. Here we use the persistent nitroxyl radical 2,2,6,6-tetramethylpiperidin-1-oxyl (TEMPO) as model system, reporting the rotational characterization of its radical pairs in a supersonic molecular jet. The experiment employs isotopic-sensitive high-resolution microwave spectroscopy, revealing two distinct neutral pairing patterns avoiding electron transfer. In each radical pair the nitroxyl molecules establish non-covalent van der Waals interactions with N···O distances of 3.38 and 4.93 Å, respectively, as confirmed by
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