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In this paper, we have prepared a stimuli-responsive luminophor£¨TPA-CO£©  consisting of benzophenone and arylamine that exhibits a weak luminescence with a quantumyield (FPL) of 0.4% due to its highly distorted structure. After grinding, the emission efficiency is increased to 12.3%. Its luminescence on¨Coff switching can be reversibly transformed by a grinding¨Cvapour process or by a pure thermal treatment, which is rarely observed in traditional mechanochromic materials.Moreover, based on the single-crystal structures and optical properties analysis, a new design strategy to explore stimuli-responsive materials with high contrast is proposed.

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