Synthesis, Luminescent Properties of aza-Boron-Diquinomethene Difluoride Complexes and Their Application for Fluorescent Security Inks

Long Gu, Rui Liu, Hong Shi, Qiang Wang, Guangliang Song, Xiaolin Zhu, Shidong Yuan, Hongjun Zhu

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Two aza-boron-diquinomethene (aza-BODIQU) complexes bearing phenyl and carbazyl substituents were synthesized and characterized. Their photophysical properties were investigated systematically via spectroscopic and theoretical methods. Both complexes exhibit strong 1π-πtransition absorptions (λ abs = 400-540 nm) and intense fluorescent emissions (λ em = 440-600 nm, Φ PL = 0.93 and 0.78) in CH2Cl2 solution and in solid state at room temperature. Compared to the complex with phenyl groups, the complex bearing carbazyl groups shows significant bathochromic shift in both absorption and emission. This could be attributed to the larger π-electron conjugation of the carbazole unit and intramolecular charge transfer feature from carbazole to aza-BODIQU component. In addition, the complexes exhibit intense photoluminescence and good stability on antacid, anti-alkali and stability in printing ink samples, which makes them potential dopants for the application of fluorescent security inks.

Original languageEnglish (US)
Pages (from-to)407-412
Number of pages6
JournalJournal of Fluorescence
Volume26
Issue number2
DOIs
StatePublished - Mar 1 2016
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Spectroscopy
  • Clinical Biochemistry

Keywords

  • Aza-boron-diquinomethene
  • Carbazole
  • Difluoride complex
  • Fluorescent security ink
  • Photoluminescence
  • Synthesis

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