A chemosensor-based chiral coassembly with switchable circularly polarized luminescence

Qiuhong Cheng, Aiyou Hao and Pengyao Xing ()
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Qiuhong Cheng: Shandong University
Aiyou Hao: Shandong University
Pengyao Xing: Shandong University

Nature Communications, 2021, vol. 12, issue 1, 1-11

Abstract: 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.

Date: 2021
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DOI: 10.1038/s41467-021-26700-2

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