Abstract
A series of anthrylene-substituted phenyleneethynylene dyes having amino/cyano group(s) were prepared by repeating Sonogashira coupling between aryl halides and terminal acetylenes. In UVvis absorption spectra, the 9,10-anthrylene-substituted dyes showed a strong absorption band of which λmax was located from 502 to 521 nm and ε was more than 5.2 × 10 4L mol- 1 cm- 1 indicating a highly expanded π-system in comparison with 1,5-anthrylene dye (λmax = 431 nm, ε= 2.6 × 10 4L mol- 1 cm- 1). LippertMataga plots demonstrated that the amino- and cyano-substituted dyes underwent larger charge separation in the excited states. These acetylenic dyes served as sensitizers of dye-sensitized solar cell to achieve 5.0% of photo-to-current energy conversion efficiency.
Original language | English (US) |
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Pages (from-to) | 687-697 |
Number of pages | 11 |
Journal | Bulletin of the Chemical Society of Japan |
Volume | 85 |
Issue number | 6 |
DOIs | |
State | Published - 2012 |