The article presents a study about enhancements on the photochromism of 2-(2,4 dinitrobenzyl) pyridine (α-DNBP) using molecular imaging, nuclear magnetic resonance imaging spectrometry and photo- and solvent-bleaching. It was found out that the syntheses of these compounds were much simpler than any other commercially available photochromic compound. The experiment further showed that the light-induced evolution of the tautomers coming from α-dinitrobenzylpyridine can be traced by molecular representation, which is significant for the photochromism of the compounds.