“…8 Among the various MFC organic emitters, small molecules with defined molecular structures have been deeply explored compared to polymeric molecules, which exhibit limitations in terms of their synthetic difficulties, reproducibility, purity, and ill-defined molecular structure. 9,10 Although a few comparative studies of compounds displaying MFC behavior have been reported, 11–14 the MIEE features of carboxylic acid and ester molecules have hardly been investigated. 15,16 The molecular packing motif in the solid state is primarily directed by inter/intramolecular H-bonding interactions.…”