Journal
JOURNAL OF MATERIALS CHEMISTRY C
Volume 1, Issue 34, Pages 5309-5314Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3tc30769g
Keywords
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Funding
- Jilin University, State Key Lab of Supramolecular Structure and Materials
- National Science Foundation of China [21072025]
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Methyl ketone has been designed as a switching unit for electrically addressable molecular colour switches. A newly proposed mechanism of electro-acid/base (radical ions)-induced intermolecular proton transfer for the colour switch is proven clearly by cyclic voltammetry (CV), X-ray photoelectron spectroscopy (XPS), infrared spectroscopy (IR) and in situ UV-Vis spectroscopy. A dramatic spectral absorption shift (about 291 nm) is observed during the switching, and blue, yellow and green colours are obtained by adjusting the substituents on the methyl ketone-bridged unit. The in situ electro-acid/base is far more convenient than the conventional chemical stimulus of acids or bases for the manipulation of the molecular switching properties. This new switching method and molecular structure manipulation will inspire and accelerate the further development of broad switching materials and applications in ultrathin flexible displays, etc.
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