4.6 Article

Corannulene-based donor-acceptor-type conjugated polymers with electrochromic properties

Journal

JOURNAL OF MATERIALS CHEMISTRY C
Volume 9, Issue 25, Pages 7919-+

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/d1tc01420j

Keywords

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Funding

  1. Program for Professor of Special Appointment (Eastern Scholar) at the Shanghai Institutions of Higher Learning
  2. Ministry of Education [110L9006]
  3. Ministry of Science and Technology in Taiwan [MOST 110-2634-F-002-043, 108-2113M-002-013-MY3]

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In this study, curved corannulene-based monomers with D and A moieties were synthesized and applied to drive color switching in pi-conjugated polymers. The absorption and emission properties of the conjugated polymers were tuned by inserting D and A moieties into the conjugated backbone. It was demonstrated that corannulene-based conjugated polymers exhibit stable electrochromic properties with a high optical contrast ratio and can be used for modern optoelectronic devices.
pi-Conjugated polymers have received increasing attention in electrochromic material research because their color change can be altered over a wide range by introducing electron-donor (D) and electron-acceptor (A) moieties. In this study, we have synthesized curved corannulene-based monomers with D and A moieties and applied them to prepare pi-conjugated polymers to drive color switching. The absorption and emission properties of our conjugated polymers can be tuned by inserting D and A moieties into the conjugated backbone. Through this study, it has been demonstrated that corannulene-based conjugated polymers exhibit stable electrochromic properties with a high optical contrast ratio. Furthermore, emissions in the solid state and reversible electrofluorescence switching are observed in these polymers. This might be due to the inhibition of aggregation-induced quenching through the incorporation of nonplanar corannulene in the pi-conjugated backbone. Based on these results, we consider corannulene-embedded pi-conjugated polymers as a new pi-conjugated system with versatile and tunable optical properties for application in modern optoelectronic devices.

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