1 Laboratoire de Caractérisation Photophysique des Matériaux Conjugués, Département de Chimie, Université de Montréal, CP 6128, Centre-ville Montreal, QC, Canada.
Stable 2-aminobithiophenes were prepared using the Gewald reaction. The resulting push-pull bithiophenes exhibited both unprecedented high fluorescence yields and stability in addition to demonstrating fluorescence on-off properties.