Polymorphism-Dependent and Mechanochromic Luminescent Molecules

Mechanofluorochromic Properties of an AIEE‐Active 2‐Phenylbenzoxazole Derivative: More than Meets the Eye?

“…Stimuli‐responsive organic materials that exhibit fluorescence emission changes upon mechanical stress, i. e. mechanofluorochromic (MFC) materials, have recently gained increasing attention both in the fundamental research field of solid photophysics and in the applied field of polymer stress sensors, security inks, data storage and memory devices . It is now widely acknowledged that the reversible emission colour transformation results from changes of solid‐state molecular interactions: the molecular packing is affected by grinding, pressing or shearing, and then restored to its original state by annealing or solvent fuming, in the absence of any chemical reaction .…”

Aggregation-induced emission enhancement (AIEE)-active tetraphenylethene (TPE)-based chemosensor for Hg2+ with solvatochromism and cell imaging characteristics

“…[28][29][30][31][32][33] Meanwhile, many stimuli-responsive materials have been reported, including photochromism, mechanochromism, and solvatochromism. [34][35][36][37][38][39][40][41][42][43][44][45][46] At present, the solvatochromism materials have been generally used in chemical and biological systems. 47 To date, many uorescent chemosensors for Hg 2+ have been reported.…”

Recent Advances in Mechanochromic Luminescence of Organic Crystalline Compounds

“…Since the MCL behaviors of crystalline compounds are highly dependent on their crystal structures, a good way to control the MCL properties of organic crystals is to prepare polymorphic or pseudopolymorphic (solvent-including) crystals. 64 Even within the past few years, a considerable number of polymorphic organic crystals have been reported to exhibit diverse MCL behaviors. 6575 To give an example, Fang and coworkers obtained three polymorphs (form-AC) of tetrahedral monoboron complex 31 (Figure 8a).…”