10.1021/jacs.5b00877.s005 Masaru Tanioka Masaru Tanioka Shinichiro Kamino Shinichiro Kamino Atsuya Muranaka Atsuya Muranaka Yousuke Ooyama Yousuke Ooyama Hiromi Ota Hiromi Ota Yoshinao Shirasaki Yoshinao Shirasaki Jun Horigome Jun Horigome Masashi Ueda Masashi Ueda Masanobu Uchiyama Masanobu Uchiyama Daisuke Sawada Daisuke Sawada Shuichi Enomoto Shuichi Enomoto Reversible Near-Infrared/Blue Mechanofluorochromism of Aminobenzopyranoxanthene American Chemical Society 2015 exhibit fluorescence wavelength Mechanofluorochromism AminobenzopyranoxantheneMechanochromic switchable arrangement monomer interconversion Switching application Reversible molecule compound analyses fluorescence responses dimeric crystal 2015-05-27 00:00:00 Dataset https://acs.figshare.com/articles/dataset/Reversible_Near_Infrared_Blue_Mechanofluorochromism_of_Aminobenzopyranoxanthene/2163802 Mechanochromic organic molecules (MOMs) that exhibit a large difference of fluorescence wavelength between two states have important potential applications, but few such compounds are known. Here, we report a new MOM, <i>cis</i>-ABPX01<sup>0</sup>, which shows switchable near-IR and blue fluorescence responses. Detailed spectrophotometric and single-crystal X-ray analyses revealed that the near-IR fluorescence is attributable to fluorescence from slip-stacked dimeric structures in crystals, while the blue fluorescence is attributable to fluorescence from the monomer. Switching between the two is achieved by dynamic structural interconversion between the two molecular packing arrangements in response to mechanical grinding and solvent vapor-fuming.