Fluorine-substituted TPE isomers with different triboluminescent behavior

摘要： Three isomers of fluorine-substituted tetraphenylethenes (TPE) demonstrate totally different triboluminescence (TL) behavior, as the results of their ignorable structural difference. Photophysical properties, packing model, single-crystal structure and density functional theory (DFT) calculations confirmed that bright TL emission is attributed to the high emission, intense intermolecular interaction and large dipole moments in solid state, indicating the introduction of fluorine atoms as an effective approach for realizing and modifying the TL performance.