Fig. 5: Photoresponsive property of MMTPA and TPA crystals.
From: Photochromic luminescence of organic crystals arising from subtle molecular rearrangement
a Luminescent photographs of MMTPA and TPA crystals under and after ceasing the 312 nm UV irradiation with different exposure time. Φ is the quantum efficiency of total emission of the sample. b–d Prompt emission spectra (b), CIE coordinate diagram (c) and delayed (td = 1 ms) emission spectra (d) of PL colour transformation process of MMTPA crystals. e FTIR spectra of MMTPA crystals before and after 12 h of 312 nm UV irradiation. f Schematic fragmental molecular packing of TPA, MMTPA and DMTPA crystals. Source data are provided as a Source Data file.
