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Published on: June 10, 2021
Mechanofluorochromism and self-recovery of alkylsilylpyrene-1-carboxamides
Yuichi Hirai1, Anna Wrona-Piotrowicz2, Janusz Zakrzewski2
1National Institute for Materials Science (NIMS) 1-1 Namiki Tsukuba 3050044 Japan hirai.yuichi@nims.go.jp.
Abstract:
A family of (alkylsilyl)pyrene-1-carboxamides exhibits similar mechanofluorochromic responses upon grinding. However, their spontaneous fluorescence recovery processes are distinct despite their similarity in chemical structures and crystal packings. Fluorescence spectroscopy, crystallography, and nanomechanical tests revealed that the chromic direction is dominated by the packing motif, while the fluorescence recovery is driven by the intermolecular interactions and the reversibility of deformation.
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