Intermolecular Interactions between Eosin Y and Caffeine Using 1H-NMR Spectroscopy
Figure 7
An overlay of 1H-NMR spectra of 12.5 mM caffeine, 20 mM eosin Y, and a mixture of 10 mM eosin Y and 6.25 mM caffeine showing the region 3.1–4.0 ppm. The upfield shifts of the N-methyl proton peaks for caffeine in presence of eosin Y are evident.
