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Mechanochromic (MC) luminogens in response to external stimulus have shown promising applications as pressure sensors and memory devices. While, research on their underlying mechanism is still in the initial stage. Here, three pyridinium-functionalized tetraphenylethylenes bearing <i>n</i>-pentyloxy group, hydrogen, nitro group, namely TPE-OP, TPE-H and TPE-NO, are designed to systematically investigate the influence of push-pull electronic effect and molecular conformation on MC luminescence.doi:10.26434/chemrxiv.12703073 fatcat:73woxeuxnbg2hoxvlrsde6kfdm