Light-harvesting ytterbium(III)-Porphyrinate-BODIPY conjugates: Synthesis, excitation-energy transfer, and two-photon-induced near-infrared-emission studies

Tao Zhang, Xunjin ZHU*, Rick W K WONG, Hoi Lam TAM, Wai Yeung WONG

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

43 Citations (Scopus)

Abstract

Based on a donor-acceptor framework, several conjugates have been designed and prepared in which an electron-donor moiety, ytterbium(III) porphyrinate (YbPor), was linked through an ethynyl bridge to an electron-acceptor moiety, boron dipyrromethene (BODIPY). Photoluminescence studies demonstrated efficient energy transfer from the BODIPY moiety to the YbPor counterpart. When conjugated with the YbPor moiety, the BODIPY moiety served as an antenna to harvest the lower-energy visible light, subsequently transferring its energy to the YbPor counterpart, and, consequently, sensitizing the YbIII emission in the near-infrared (NIR) region with a quantum efficiency of up to 0.73 % and a lifetime of around 40 μs. Moreover, these conjugates exhibited large two-photon-absorption cross-sections that ranged from 1048-2226 GM and strong two-photon-induced NIR emission.

Original languageEnglish
Pages (from-to)739-748
Number of pages10
JournalChemistry - A European Journal
Volume19
Issue number2
DOIs
Publication statusPublished - 7 Jan 2013

Scopus Subject Areas

  • Catalysis
  • Organic Chemistry

User-Defined Keywords

  • BODIPY
  • energy transfer
  • near-infrared emission
  • porphyrinoids
  • ytterbium

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