Dioctylfluorene-bithiophene

Not only limited to the PFO polymer, another fluorene-based polymer poly(9,9-dioctylfluorene-a/t-benzothiadiazole) (F8BT) is also able to discrimi-nately wrap SWNTs with larger diameters such as a (15,4) tube." It has been suggested that a stable exciplex between poly[(9,9-dioctyl-fluorenyl-2,7-diyl)-co-(bithiophene)] (F8T2) and SWNTs exists, in which the energy level matching between SWNTs and fluorene-based polymers is responsible for the chirality selectivity. 

An efficient green-emitting fluorene copolymer 65a was synthesized by Shim and co-workers via Suzuki coupling of 2,5-dibromothieno[3,2-fc]thiophene with 9,9-dioctylfluorene-2,7-diboronic acid bis(pinacol ester) [103]. The authors compared the EL properties of this copolymer with those of PEO and PEO-bithiophene copolymer 52a. The absorption and emission spectra of 65a are red shifted compared with PFO but slightly blue shifted compared with 52a. A PLED fabricated in the configuration ITO/PEDOT/ 65a/LiF/Al showed a pure green emission (CIE x = 0.29, y = 0.63) with a turn-on voltage as low... 

Levermore, P.A., Jin, R., Wang, X., De Mello, J.C., Bradley, D.D.C. Organic light-emitting diodes based on poly(9,9-dioctylfluorene-co- bithiophene) (F8T2). Adv. Funct. Mater. 19(6),... 

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