Donor-Pi-Acceptor Fluorene Conjugates, Based on Chalcone and Pyrimidine Derivatives: an Insight into Structure-Property Relationship, Photophysical and Electrochemical Properties

Jamaluddin Mahar, Ghulam Shabir, Pervaiz Ali Channar, Aamer Saeed, Kevin D. Belfield, Madiha Irfan, Anwar Ul-Hamid

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

A small set of four new fluorenyl chromophores (5-5a-c) was accomplished by stepwise nucleophilic substitution, Friedel-Crafts acylation, Ullman coupling, aldol condensation and cyclization reactions. The fluorene moiety was substituted at 2,7,9 and 9′ positions with diverse groups. The synthesized derivatives were characterized by FTIR, 1H-NMR and 13C-NMR spectroscopic techniques. The optical properties were evaluated by by UV-VIS absorption and Fluorescence studies. HOMO and LUMO energy levels were evaluated by electrochemical studies and were found at −5.37-5.83 eV and − 2.47-2.94 eV respectively with band gap energy values 2.88 to 2.91 eV. The band gap energy values suggested that these synthesized molecules can be manipulated in the designing of blue and green OLEDS. [Figure not available: see fulltext.].

Original languageEnglish (US)
Pages (from-to)419-426
Number of pages8
JournalJournal of Fluorescence
Volume30
Issue number2
DOIs
StatePublished - Mar 1 2020

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Clinical Psychology
  • Social Sciences (miscellaneous)
  • Sociology and Political Science
  • Spectroscopy
  • Clinical Biochemistry
  • Law

Keywords

  • Band gap energy
  • Fluorene conjugates
  • HOMO and LUMO
  • OLEDS
  • Optoelectronic properties

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