Molecular design for the highly-sensitive piezochromic fluorophores with tri-armed framework containing triphenyl-quinoline moiety

Full-color tunable mechanofluorochromism and excitation-dependent emissions of single-arm extended tetraphenylethylenes

“…S3, ESI †). [52][53][54] It is a The concentration of THF solution is 1 Â 10 À5 mol L À1 . b Fluorescence quantum yield.…”

A donor–acceptor cruciform π-system: high contrast mechanochromic properties and multicolour electrochromic behavior

“…In most cases, the MC phenomenon is mainly attributed to the change of intermolecular interactions and molecular arrangement in the condensed state, 1a however the unusual large shi of chromism in this case seems to reside mostly in the D-A cruciform module for its lower degree of crystallinity. A proposed explanation for the enhanced MC properties is that the distorted molecules, especially the TPA donors with large torsion angles, are subjected to conformational change and rotate to a position more parallel to the coplanar under external pressure, 7f leading to extended conjugation 18 and subsequent planar intramolecular charge transfer (PICT). 7d The ICT delocalization in DMCS-TPA molecules will be greatly strengthened, resulting in remarkable red-shi of emission and decrease of uorescent intensity.…”

Achieving tricolor luminescence switching from a stimuli-responsive luminophore based on a bisarylic methanone derivative

“…Consequently, the twisting strain of molecules in the crystal lattice is released, resulting in the planarization of the molecular conformation. The planarization of the molecular conformation will result in the extension of the molecular π-conjugate length, 30 which further enhances ICT, resulting in the planar intramolecular charge transfer (PICT) phenomenon. 1 e ,31 Moreover, in the amorphous phase, the molecules are packed in close proximity through π–π stacking interactions to form an aggregate.…”