Well defined dialkylfluorene/oligothiophene and dialkylfluorene/dithienylvinylene
alternating copolymers have been synthesized via the polycondensation
of 2,7-dibromo-(9,9-dialkylfluorene) with the appropriate
distannylated (oligo)thienylene component according to a Stille-type
coupling reaction using tetrakis(triphenylphosphine)palladium [Pd(PPh3)4] as
catalyst. The alternate incorporation of the thienylene building
blocks leads to the tunability of the photoluminescent properties
of the alternating copolymers. The long wavelength absorption and
photoluminescence maxima of the copolymers display a subsequent
bathochromic shift upon increasing the size of the (oligo)thienylene
building block.
fluorene - thiophene - polymers - condensation - photoluminescence - Stille reaction
