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- W4385494186 abstract "Liquid single crystal elastomers (LSCEs) containing organic fluorophores within their polymeric network are attractive materials to detect forces with simple spectroscopic measurements. Hitherto, all mechanoluminescent LSCEs decrease their emission intensity upon mechanical stimulation; that is, they display negative mechanofluorescence. Such behavior is governed by the mechanically induced approximation of the quenching mesogenic units and the fluorophores. In this work, we propose the integration of fluorescent molecular rotors (FMRs), whose luminescence is not quenched by the mesogens, in LSCEs as a valuable strategy to conceive elastomeric materials programmed with exactly the opposite behavior, i.e., their fluorescence increases upon deformation (positive mechanofluorescence). Specifically, carbazole-indolenine dyes are interesting candidates for this purpose since their luminescence depends mainly on the degree of intramolecular rotation allowed by the local environment. On this basis, the uniaxial deformation of an LSCE, along its anisotropic direction, incorporating such FMRs will place the fluorophores in a more restricted medium, leading to the desired enhanced emission at the macroscale." @default.
- W4385494186 created "2023-08-03" @default.
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- W4385494186 date "2023-08-02" @default.
- W4385494186 modified "2023-10-18" @default.
- W4385494186 title "Programming Positive Mechanofluorescence in Liquid Crystalline Elastomers" @default.
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- W4385494186 doi "https://doi.org/10.1021/acsapm.3c01050" @default.
- W4385494186 hasPublicationYear "2023" @default.
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