‡Next-generation Imaging Team, RIKEN-CLST, Kobe-shi, Hyogo 650-0047, Japan.
§Advanced Elements Chemistry Research Team and Elements Chemistry Laboratory, RIKEN-CSRS, Wako-shi, Saitama 351-0198, Japan.
J Am Chem Soc. 2015 May 27;137(20):6436-9. doi: 10.1021/jacs.5b00877. Epub 2015 May 14.
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, cis-ABPX01(0), 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.
机械变色有机分子（MOMs）在两种状态之间表现出较大的荧光波长差异，具有重要的潜在应用，但已知的此类化合物很少。在这里，我们报告了一种新的 MOM，cis-ABPX01(0)，它表现出可切换的近红外和蓝色荧光响应。详细的分光光度和单晶 X 射线分析表明，近红外荧光归因于晶体中滑移堆积二聚体结构的荧光，而蓝色荧光归因于单体的荧光。通过机械研磨和溶剂蒸气熏处理响应，两种分子堆积排列之间的动态结构互变来实现两种荧光之间的切换。
