文摘
A salicylaldehyde azine-based derivative, which exhibited switchable solid-state fluorescence in response to external thermal and mechanical grinding stimulus, was reported in this study. Diffuse reflectance solid-state spectroscopy, fluorescence spectroscopy, solid-state 13C and 1H NMR spectroscopy, single crystal XRD analyses, powder X-ray diffractometry, and differential scanning calorimetry were used for investigating the changes of molecular packing modes. The multistimuli fluorescence originated from two distinctive crystalline lattices via different 蟺鈥撓€ interactions. The local dipole coupling among molecules with donor鈥損lanar鈥揳cceptor structure was evidenced to be the essential factor for the effective solid luminescence-switching properties.