= Barbara Procacci
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= B. Procacci
{c}
{synonym}
\b[Barbara Procacci] is a chemist whose work includes time-resolved <nuclear magnetic resonance> and <infrared spectroscopy> of photochemical reactions. Her University of York profile identifies mechanistic studies of light-induced transformations in metal complexes and development of NMR methods for following fast reactions.<Barbara Procacci profile at the University of York>[Research interests and Selected publications]{ref}
The experimental strategy couples an initiating event to a later structural probe. A light pulse can perturb a molecular system; a measurement at a controlled delay then asks which products or intermediates are present. Repeating the measurement over delays connects spectral assignments with a reaction time course. A single final spectrum would lose that ordering information.
Procacci coauthored the2022 <RNA hairpin> refolding paper, which combines an infrared <temperature jump> with delayed spectroscopic observations during melting and cooling.<Measuring RNA UNCG Tetraloop Refolding Dynamics Using Temperature-Jump Drop Infrared Spectroscopy by C. P. Howe and others>[Title-page byline; Abstract; experimental method]{ref}
Her contribution thus sits at the interface between a physical perturbation and a chemical interpretation of the response. An observed transient band must be related to a molecular change and to the measurement's timing; its occurrence after a pulse alone does not identify a unique reaction mechanism.
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