Abstract
The potential use of prominent piezochromic materials in optical recording and mechanical sensors has sparked widespread interest. However, the luminescence quenching effect caused by the aggregation of photo-functional molecules and their disordered stacking have limited the development in piezochromic field. Here, perylene-3,4,9,10-tetracarboxylic diimide (PDI) was selected as the chromophore, layered double hydroxide (LDH) as the inorganic matrix, and polyvinyl alcohol (PVA) as the film-forming material to jointly construct the (PDI-LDH@PVA) film. The film shows a fluorescence sensitive response to the external pressure due to the changed interaction force between the three components. The confinement effect of LDH enables PDI molecules to form a highly ordered structure in a stretchable free space, giving pressure sensor a larger response range and good reversibility. This work provides design rules for the construction of pressure-sensitive systems, which will guide the development of advanced photo-functional materials.
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