| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5281345 | Tetrahedron Letters | 2010 | 4 Pages |
Abstract
A series of diphenylamino-substituted phenylene-(poly)ethynylenes were successfully synthesized by a combination of Sonogashira coupling and double elimination protocol of β-substituted sulfones. When UV-light was irradiated, the amino-substituted phenylene-(poly)ethynylene emitted strong luminescence. The emission underwent a large bathochromic shift in polar solvent because of stabilization of their charge-separated excited states. Analyses of fluorescence life times of aminoacetylenes revealed that radiationless process was suppressed in the polar solvent CH2Cl2, resulting in high quantum yields.
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Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Jing-Kun Fang, De-Lie An, Kan Wakamatsu, Takeharu Ishikawa, Tetsuo Iwanaga, Shinji Toyota, Daisuke Matsuo, Akihiro Orita, Junzo Otera,