Author/Authors :
Fang، نويسنده , , Jing-Kun and An، نويسنده , , De-Lie and Wakamatsu، نويسنده , , Kan and Ishikawa، نويسنده , , Takeharu and Iwanaga، نويسنده , , Tetsuo and Toyota، نويسنده , , Shinji and Matsuo، نويسنده , , Daisuke and Orita، نويسنده , , Akihiro and Otera، نويسنده , , Junzo، نويسنده ,
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.
