Abstract
The supramolecular chiral recognition between rac-2a and several structured RNA leads to a distinct (19)F NMR signal splitting. The (19)F NMR analysis of the diastereomeric pairs formed upon binding of this racemic probe delivers a topological footprint of the RNA. This phenomenon can be exploited to investigate dynamic events involving structural equilibria, as demonstrated in a melting experiment. This work provides a proof of concept that small fluorinated moderate binders can act as external probes of RNA structures.
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