Fig. 1: Photochromic luminescent crystals with distinct PL colour change and proposed mechanism. | Nature Communications

Fig. 1: Photochromic luminescent crystals with distinct PL colour change and proposed mechanism.

From: Photochromic luminescence of organic crystals arising from subtle molecular rearrangement

Fig. 1

a Chemical structures of compounds studied in this work. b, c Luminescent photographs of colour transforming process of DMTPA (b) and MMTPA (c) crystals under 312 nm UV light. d Schematic illustration of proposed mechanism. UV light prompts subtle molecular rearrangement in crystals to a metastable state, which corresponds to lower energy gaps. Fluo., Phos. and Exc. represent fluorescence, phosphorescence and excitation, respectively.

Back to article page