Abstract
Fluorescent chemosensors represent fast response to analytes with pronounced luminescent variations. They are promising as potential candidates in controlling luminescence and chiroptical activities of self-assembled chiral systems, which however have not been accomplished to date. We present a coassembled multiple component system that could respond to SO2 derivatives, giving rise to dynamic aggregation behaviors and switchable luminescence as well as circularly polarized luminescence (CPL). Cholesteryl-naphthalimide and coumarin derivatives coassemble into vesicles and nanohelices under the solvent strategy, behaving as energy transfer donor and accepter respectively. Energy transfer enables CPL transition from green to red depending on the molar fraction. After the addition of SO2 derivatives, hypochromic shifts occur to CPL due to the nucleophilic addition reaction to coumarin domain, hindering energy transfer and allow for the emergence of pristine luminescence. Here, we show a protocol to control over luminescence and chiroptical features of supramolecular chiral self-assemblies using fluorescent chemosensors.
Highlights
Fluorescent chemosensors represent fast response to analytes with pronounced luminescent variations
Chiroptical switch refers to the reversible variation of chiroptical signals such as circular dichroism (CD), circularly polarized luminescence (CPL), and vibrational circular dichroism (VCD) responding to specific stimuli
We assume that the introduction of fluorescent chemosensor into multiple component coassemblies would facilitate the fabrication of switchable luminescence and the corresponding chiroptical properties including Cotton effects and CPL
Summary
Fluorescent chemosensors represent fast response to analytes with pronounced luminescent variations They are promising as potential candidates in controlling luminescence and chiroptical activities of self-assembled chiral systems, which have not been accomplished to date. 1234567890():,; As one of the most intriguing properties of chiral species, chiroptical activity represents polarized optical features, which normally include circular dichroism (CD), circularly polarized luminescence (CPL), vibrational circular dichroism (VCD), and Raman optical activity (ROA)[1,2,3,4,5,6]. Starting from this work, more functional sensor-based chiral systems are expected under switchable and smart control manners
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