Synthesis and Mechanofluorochromism of 4-[Bis(4-methylphenyl)amino]acetophenone

Abstract

In order to create a new mechanofluorochromic material, title compound (BMAAP) was designed and synthesized. BMAAP was found to readily form an amorphous glass with a glass transition temperature of 9 °C and exhibit solvatofluorochromism in solution. BMAAP was also found to exhibit fluorescence both in crystalline state and in amorphous one and the fluorescence color in amorphous state was different from that in crystalline state. Finally, we have found that BMAAP exhibited mechanofluorochromism and the phenomenon was suggested to be caused by morphological change from crystalline state to amorphous one by mechanical grinding.