Synthesis and fluorescence properties of carbazole and fluorene-based compounds |
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| Authors: | Hongxia Shao |
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| Institution: | Department of Chemistry, Zhejiang University, Hangzhou 310027, PR China |
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| Abstract: | Three donor-acceptor (D-A) conjugated compounds consisted of carbazole and fluorene (Scheme 1) were synthesized via Wittig-Horner, Ullmann or Sonogashira reaction. Their photoluminescence properties were investigated in solution and solid state, respectively. Luminescence in various solvents revealed the intramolecular charge transfer (ICT) process exists in these D-A molecules. Correlation between the Stokes’ shifts and solvent polarity parameters indicated that moderate large dipole moments exist in the excited states. |
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| Keywords: | Carbazole Fluorene Donor-acceptor ICT Stoke shift Lippert-Mataga equation Dipole moment |
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