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Highly Reversible Electrofluorochromism from Electrochemically Decoupled but Electronically Coupled Molecular Dyads

Title
Highly Reversible Electrofluorochromism from Electrochemically Decoupled but Electronically Coupled Molecular Dyads
Authors
Kim, SinheuiYou, Youngmin
Ewha Authors
유영민
SCOPUS Author ID
유영민scopus
Issue Date
2019
Journal Title
ADVANCED OPTICAL MATERIALS
ISSN
2195-1071JCR Link
Citation
ADVANCED OPTICAL MATERIALS vol. 7, no. 15
Keywords
electrofluorochromismmolecular dyadstwisted intramolecular charge transfer
Publisher
WILEY-V C H VERLAG GMBH
Indexed
SCIE; SCOPUS WOS
Document Type
Article
Abstract
Although electrofluorochromism enables unique optoelectronic applications, its utility has been limited by poor reversibility. It is demonstrated that high reversibility in electrofluorochromism is obtainable from molecular dyads having a redox-stable acceptor and an aromatic or antiaromatic donor. The structural control aims to generate excited-state conjugation that produces twisted intramolecular charge-transfer fluorescence, while suppressing the ground-state conjugation in order to confine electrochemical processes exclusively within the acceptor unit. Overpotential-free electrofluorochromism can be achieved with a high fatigue resistance against repeated electrochemical cycles. The electrofluorochromism is investigated using structural, spectroscopic, electrochemical, spectroelectrochemical, and quantum chemical techniques. The studies reveal that electrochemical gating of intramolecular charge transfer is the key mechanism underlying the improved electrofluorochromism performance. The study will provide novel insights into the future development and applications of electrofluorochromic devices.
DOI
10.1002/adom.201900201
Appears in Collections:
엘텍공과대학 > 화학신소재공학전공 > Journal papers
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