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| Type |
Poster Presentation |
| Area |
Organic Chemistry |
| Room No. |
Event Hall |
| Time |
4월 19일 (목요일) 11:00~12:30 |
| Code |
ORGN.P-401 |
| Subject |
Electrochromic Fluorescence Switching of Oligothiophene-based Dye in Liquid Crystal Phase |
| Authors |
Seung Han Nam, KyeongIm Hong, Woo-Dong Jang*
Department of Chemistry, Yonsei University, Korea
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| Abstract |
Dyes that can change their color of emission by external stimuli are currently receiving spotlight in optical device. In previous works, dyes having electrochromic property required metal or redox moieties in their system when electrochromic change occurred. In this research, we have synthesized electrochromic fluorescent dyes which has tunable optical properties in organic solvents or liquid crystal. The oligothiophene-based dyes showed electrochromic change upon electric potential application without any metal frames or co-redox complexes. Owing to the hydroxyl group and nitrogen atom in the oligothiophene-based dyes, fluorescent emission of the dyes have been greatly shifted. Dyes were mixed with liquid crystal such as 5CB and PCH5.
Absorption and emission spectra of each dyes can be controlled under electrical stimulus. In the presence of potential, absorption and emission spectra of each dyes moved toward long wavelength region and changes of their emission colors. The emission changes were recovered to original emission by removing electric potential. We could prepare a mixture of dye that showed white emission color under electric potential application. Moreover, we could maintain the emission color changes by rapid cooling process. The details will be discussed in this symposium.
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| E-mail |
namsh7498@gmail.com |
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121st General Meeting of the KCS