Synthesis, redox and optical properties of low-bandgap platinum(II) polyynes with 9-dicyanomethylene-substituted fluorene acceptors

Wai Yeung Wong, Ka Ho Choi, Guo Liang Lu, Jian Xin Shi

Research output: Journal article publicationJournal articleAcademic researchpeer-review

88 Citations (Scopus)

Abstract

In view of the strong electron-with-drawing nature of the cyano substituent, a blue donor/acceptor-type organometallic polymer (trans-[-Pt(PBu3)2-C≡C-R-C≡C-]n (R = 9-dicyanomethylenefluorene-2,7-diyl)) was prepared in good yield by CuI-catalyzed polymerization involving the dehydrohalogenating coupling of trans-[Pt(PBu3)2Cl2] and H-C≡C-R-C≡C-H. The thermal, redox and photoconducting properties of the polymer are reported. Electronic absorption studies indicate that it has a bandgap of 1.58 eV which is the lowest among any of the metal polyyne polymer reported in the literature. The derivatization of the polymer backbone with electron deficient dicyano-substituted electron acceptor in the side chain is found to be effective to tune the bandgap of this class of materials while maintaining their solubility and processability.
Original languageEnglish
Pages (from-to)461-465
Number of pages5
JournalMacromolecular Rapid Communications
Volume22
Issue number6
DOIs
Publication statusPublished - 5 Apr 2001
Externally publishedYes

ASJC Scopus subject areas

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

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