Electrogenerated chemiluminescence of N,N-dimethylamino functionalized tetrakis(phenylethynyl)pyrenes

Yeon Ok Lee, Tuhin Pradhan, Kihang Choi, Dong Hoon Choi, Joung Hae Lee, Jong Seung Kim

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


The synthesis of star-shaped molecules, comprising a pyrene core with tetrakis(phenylethynyl) arms substituted with N,N-dimethylamino and propyl groups (1-5), is reported. The electrochemical and photophysical properties of 1-5 depend on the number of N,N-dimethylamino groups on the tetrakis(phenylethynyl)pyrene framework. In electrogenerated chemiluminescence (ECL) studies, the spectra of 4 and 5 show red-shifts and band broadening; in contrast, 1 exhibits a typical high-intensity pyrene ECL emission. It was confirmed that the ECL spectra arise from the intramolecular charge transfer (ICT) induced by the annihilation of radical ions owing to the presence of a strong donor.

Original languageEnglish
Pages (from-to)5908-5912
Number of pages5
Issue number29
Publication statusPublished - 2013 Jul 22

Bibliographical note

Funding Information:
This work was supported by the CRI project (20120000243) (J.S.K.) and Priority Research Centers Program (20120005860) of Research Institute for Natural Sciences from NRF of Korea (K.C. and D.H.C.).


  • Intramolecular charge transfer (ICT)
  • Radical stability
  • Substitution N,N-dimethylamino group
  • Tetrakis(phenylethynyl)pyrene

ASJC Scopus subject areas

  • Biochemistry
  • Drug Discovery
  • Organic Chemistry


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