Abstract
The interactions of ascorbic acid (AA) with nicotinamide (NA) were investigated by cyclic voltammetry (CV), 1H nuclear magnetic resonance (1H NMR), density functional theory (DFT) and atoms in molecules (AIM) analysis. Changes in the anodic peak potential of AA and the 1H NMR chemical shifts of NA indicated the formation of hydrogen bonding between AA and NA. The DFT and AIM results confirmed the mainly interaction sites are the hydrogen atoms on enediol of AA, and the nitrogen atom on the pyridine ring and the carbonyl oxygen atom on the amide group of NA.
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