New base-dopable well-defined poly-2,7-fluorene derivatives
Well-defined poly(2,7-fluorene) derivatives have been prepared through palladium-catalyzed couplings; using this versatile synthetic method, processable polyfluorenes have been obtained in good yields. In solution, these yellow polymers exhibit blue emission around 410 nm with high quantum yields. Moreover, novel acidic polyfluorene derivatives have been synthesized (e.g., poly(2,7{prime}-(pentyl 9,9-dioctyl-7,2{prime}-bifluorene-9{prime}-carbonyl))) which show, upon base-doping, electrical conductivities of 10{sup {minus}2}--10{sup {minus}3} S/cm. This new doping method for conjugated polymers could open the way to the preparation of air-stable electron-injecting electrodes. Polyfluorene derivatives show their potential to play a double function in the fabrication of LEDs, i.e., as n-type electrode and luminescent polymeric materials.
- Research Organization:
- Univ. de Montreal, Quebec (CA)
- Sponsoring Organization:
- Natural Sciences and Engineering Research Council of Canada
- OSTI ID:
- 20034163
- Country of Publication:
- United States
- Language:
- English
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