Affiliation:
1. Shanghai Jiao Tong University
Abstract
Abstract
Photo-responsive colour-changing luminescent materials play an increasingly significant role in intelligent applications for their programmability. Nevertheless, current research mainly focuses on photochemical processes, while the photoluminescence (PL) transformation is scarcely accomplished by uniformly adjusting the aggregation mode. Here we show an impressive photo-luminochromism phenomenon from organic crystals (e.g. dimethyl terephthalate crystals) with PL varying from dark blue to purple and then to bright orange. This change is attributed to the subtle molecular rearrangement prompted by light irradiation. The through-space π-π interactions and moderate short contacts between ester groups are vital to enable this process. Furthermore, while the irradiated crystals own outstanding stability, the PL transformation is reversible with sufficient relaxation. These materials show promising applications in information storage and smart optoelectronic devices. These findings provide a new venue to the construction of smart photo-luminochromic materials with remarkable PL colour changes through molecular rearrangement.
Publisher
Research Square Platform LLC
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