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A series of linear and X-shaped oligo(para-phenylene) derivatives functionalized with fluorene ethynylenes 1,3 and 4 were synthesized through sequent Sonogashira coupling and Suzuki-Miyaura reaction in high yield.The electron-donating group-OCH_3 and electron-withdrawing counterparts-CF_3 were introduced to tune the spectra properties of compounds 3 and 4.The detail investigation of their photophysical properties in solution and film indicated that the introduction of both -OCH_3 and -CF_3 makes maximum emission distinct red-shift in comparison with parent compound 1,but the latter more prominently.
A series of linear and X-shaped oligo (para-phenylene) derivatives functionalized with fluorene ethynylenes 1,3 and 4 were synthesized through sequent Sonogashira coupling and Suzuki-Miyaura reaction in high yield. Electron-donating group-OCH_3 and electron-withdrawing counterparts-CF_3 were introduced to tune the spectra properties of compounds 3 and 4. The detail investigation of their photophysical properties in solution and film indicated that the introduction of both -OCH_3 and -CF_3 makes maximum emission distinct red-shift in comparison with parent compound 1, but the latter more prominently.