Synthesis, photoluminescence and electrochemical properties of 2,7-diarylfluorene derivatives

Journal of Chemical Sciences

N Periasamy2¹  Pabitra K Nayak¹  Neeraj Agarwal¹ 

[1] Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400 005$$

关键词: Fluorene;    DFT calculation;    blue emitters;    HOMO level and OLED.;   

DOI  :  

来源: Indian Academy of Sciences

【 摘 要 】

A new class of highly fluorescent 9,9'-bis-(alkyl)-2,7-diarylfluorene having electron withdrawing or electron donating groups on the 𝑝-phenyl positions were synthesized and characterized. The highly luminescent fluorene derivatives, 1-6 showed blue emission (376-416 nm), narrow FWHM (∼ 50 nm), high quantum yield (𝜙F = 0.12-0.87) and short fluorescence lifetimes, 𝜏F = 0.23-1.14 ns. The HOMO levels of 9,9'-bis-(alkyl)-fluorene were tuned by the p-substituents at 2,7-phenyl group. Hammett correlation with 𝐸HOMO of these new molecules provides an effective tool to predict the HOMO level of similar molecules prior to the synthesis. These data indicate that they are useful as emitting materials for organic light emitting devices, OLEDs.

【 授权许可】

Unknown