Merocyanine dyes exhibit fascinating chromic effects which make them good materials for undergraduate students to explore the fundamental knowledge of solvatochromic, thermochromics effects, and even aggregation and fluorescence of the conjugated compound. MOED (1-methyl-4-[(oxocyclohexadienylidene)-ethylidene]-1,4-dihydropyridine) has been noted for its solvatochromic effect, which means that the color of the solution will change when the compound is dissolved in solvents with different polarities. However, the long and complex synthesis steps have made MOED unavailable for undergraduates as a satisfactory organic chemistry lab experiment. This poster outlines a one-pot synthesis of MOED, which aims to shorten the time, save materials, and get a higher yield. Therefore, students could finish the experiment in a regular three-hour lab period. The modified experimental procedure has made the dyes easier to be synthesized without compromising its quality and yield.
Tianzi Zhang, ’15
Sponsor: Charles Liberko