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• W4319981892 endingPage "119752" @default.
• W4319981892 startingPage "119752" @default.
• W4319981892 abstract "Three cyanostilbene isomers DCSB-In, DCSB-IO and DCSB-Ou with different cyano positions have been designed and synthesized. The –CN regio-isomerization in this system results in distinct aggregation-induced optical properties, mechano- and piezochromic luminescent properties. By shifting –CN unit from β to α position, molecules convert from a typical ACQphore (DCSB-Ou) to AIEEgen (DCSB-In). It is noteworthy that DCSB-Ou with β-CN groups exhibits an obvious mechanochromic (MC) property, whereas no photoluminescent (PL) shift is observed from DCSB-In upon grinding though accompanied with the crystalline-amorphous phase transition like most reported MC materials. Moreover, all isomers show piezochromic (PC) properties, and the PL of both DCSB-In and DCSB-IO red-shifts consistently and almost linearly dependent on the increased hydrostatic pressures, whereas DCSB-Ou experiences two stages of fluorescent change with more than 200 nm of wavelength shift. With only regio-isomerization but varied MC and PC performances, these cyanostilbene analogues as the model molecules provide a platform to explore the distinct MC and PC mechanisms. Photophysical properties, structural analysis, theoretical calculations and in-situ tests were comparatively studies to establish the origin of MC and PC phenomenon. The subtle modulation of –CN position could significantly influence the intermolecular interaction, thus control the π-stacking mode in solid-state, and endow molecules with different stimuli dependent fluorescent properties." @default.
• W4319981892 created "2023-02-11" @default.
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• W4319981892 date "2023-05-01" @default.
• W4319981892 modified "2023-09-27" @default.
• W4319981892 title "Realization of distinct mechano- and piezochromism by regio-isomerization of cyanostilbene isomers" @default.
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• W4319981892 doi "https://doi.org/10.1016/j.jlumin.2023.119752" @default.
• W4319981892 hasPublicationYear "2023" @default.
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