Design and synthesis of efficient blue thermally activated delayed fluorescence molecules bearing triarylborane and 10,10-dimethyl-5,10-dihydrophenazasiline moieties

Yuichi Kitamoto, Taketo Namikawa, Takatsugu Suzuki, Yasuo Miyata, Hiroshi Kita, Tetsuo Sato, Shuichi Oi

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

With the aim of tuning and generating blue emission from boron-based thermally activated delayed fluorescence (TADF) molecules, new luminescent molecules having an electron-donating 10,10-dimethyl-5,10-dihydrophenazasiline unit and an electron-accepting 10H-phenoxaborin unit (1a) or dimesitylborane unit (1b) were designed and synthesized. Compounds 1a and 1b in toluene solution showed deep blue and pure blue emissions at 296 K. The investigation of the photoluminescence properties revealed that the molecules possessed intramolecular charge transfer and TADF characteristics. Compounds 1a and 1b also exhibited high photoluminescence quantum yields of 81%.

Original languageEnglish
Pages (from-to)4914-4917
Number of pages4
JournalTetrahedron Letters
Volume57
Issue number44
DOIs
Publication statusPublished - 2016

Keywords

  • Dihydrophenazasiline
  • Intramolecular charge transfer compound
  • Thermally activated delayed fluorescence
  • Triarylborane

ASJC Scopus subject areas

  • Biochemistry
  • Drug Discovery
  • Organic Chemistry

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