Synthesis, Characterization and Photophysical Properties of Metallopolyynes and Metallodiynes of Platinum(II) with Dibenzothiophene Derivatives

Cheuk Lam HO*, Suk Yue Poon, Pik Kwan Lo, Ricky M S WONG, Wai Yeung WONG

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Soluble, thermally stable, and easily processable platinum(II) polyyne polymers of the form trans-[-Pt(PBu3)2C≡CRC≡C-]n (R = 2,8-disubstituted dibenzothiophene, 2,8-disubstituted and 3,7-disubstituted dibenzothiophene-S,S-dioxide units) have been prepared in good yields by CuI-catalyzed polymerization involving the dehydrohalogenating coupling of trans-[PtCl2(PBu3)2] and HC≡CRC≡CH. We report their optical absorption and photoluminescence spectra and compare the results with the monomeric model complexes trans-[Pt(Ph)(PEt3)2C≡CRC≡CPt(Ph)(PEt3)2]. The different electronic properties and linkage geometry of the central R group lead to new organometallic materials with distinct photophysical traits. The polymer with more conjugated 3,7-disubstituted dibenzothiophene-S,S-dioxide mainly displays fluorescence band, while its isomer with less conjugated 2,8-disubstituted spacer effectively enhances the intersystem crossing rate and strong phosphorescence emission can be detected even at room temperature.

Original languageEnglish
Pages (from-to)206-215
Number of pages10
JournalJournal of Inorganic and Organometallic Polymers and Materials
Volume23
Issue number1
DOIs
Publication statusPublished - Jan 2013

Scopus Subject Areas

  • Polymers and Plastics
  • Materials Chemistry

User-Defined Keywords

  • Acetylide
  • Dibenzothiophene
  • Photoluminescence
  • Platinum
  • Sulfone

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