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When Light and Acid Play Tic-Tac-Toe with a Nine-State Molecular Switch
Clément Guerrin1, Youssef Aidibi2, Lionel Sanguinet2
1Université de Lille, CNRS, UMR 8516, LASIR , Laboratoire de Spectrochimie Infra-rouge et Raman , F-59000 Lille , France.
Journal of the American Chemical Society
|November 15, 2019
Summary
Researchers developed novel BiBox molecules with multiple switching functions. These molecules exhibit multiresponsive behaviors, controllable by chemical stimuli and light, enabling complex molecular systems.
Area of Science:
- Molecular Chemistry
- Supramolecular Chemistry
- Materials Science
Background:
- Developing molecules with multiple, independent switching functions is key for advanced molecular systems.
- Multiresponsive and multiaddressable molecular systems offer enhanced control and functionality.
Purpose of the Study:
- To design and synthesize novel molecular systems, termed BiBox, integrating two indolino-oxazolidine (Box) moieties.
- To investigate the multiaddressable and multiresponsive properties of BiBox systems through chemical and light stimuli.
Main Methods:
- Synthesis of BiBox molecules featuring Box moieties linked by ethylenic junctions to aromatic bridges.
- Characterization using Nuclear Magnetic Resonance (NMR) and UV-visible spectroscopy.
- Analysis of fluorescence properties via steady-state fluorescence spectroscopy.
Main Results:
- Successfully synthesized and characterized BiBox systems, demonstrating up to nine distinct commutation states.
- Confirmed chemical addressability of oxazolidine ring opening/closure and light-induced trans-to-cis isomerization of ethylenic junctions.
- Observed significant modulation of fluorescence emission properties based on the open/closed states of the Box moieties.
Conclusions:
- BiBox molecules represent a viable strategy for creating multiaddressable and multiresponsive systems.
- The interplay between chemical and photoresponsive switching offers precise control over molecular states and properties.
- These findings open avenues for designing sophisticated molecular devices with tunable optical characteristics.
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