2,3,4,5-tetraphenylsilole-based conjugated polymers: Synthesis, optical properties, and as sensors for explosive compounds

Li Hong Zhang, Tao Jiang, Lian Bin Wu, Jun Hua Wan, Chih Hsien Chen, Yong Bing Pei, Hua Lü, Yuan Deng, Gao Feng Bian, Hua Yu Qiu, Guo Qiao Lai

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)

Abstract

A series of linear 2,5-tetraphenylsilole-vinylene-type polymers were successfully synthesized for the first time. The tetraphenylsilole moieties were linked at their 2,5-positions through a vinylene bridge with p-dialkoxybenzenes to obtain polymer PSVB and with 3,6-carbazole to obtain polymer PSVC. For comparison, 2,5-tetraphenylsilole-ethyne-type polymer PSEB was also synthesized, in which the vinylene bridge of PSVB was replaced with an ethyne bridge. Very interestingly, the bridging group (vinylene or ethyne) had a significant effect on the photophysical properties of the corresponding polymers. The fluorescence peak of PSEB at 504 nm in solution originated from the emission of its silole moieties, whereas PSVB and PSVC emitted yellow light and no blueish-green emission from the silole moieties was observed, thus demonstrating that the emissions of PSVB and PSVC were due to their polymer backbones. More importantly, the 2,5-tetraphenylsilole-ethyne polymer exhibited a pronounced aggregation-enhanced emission (AEE) effect but the 2,5-tetraphenylsilole- vinylene polymer was AEE-inactive. Moreover, both AEE-active 2,5-tetraphenylsilole-ethyne polymer and AEE-inactive 2,5-tetraphenylsilole- vinylene polymers were successfully applied as fluorescent chemosensors for the detection of explosive compounds.

Original languageEnglish
Pages (from-to)1583-1593
Number of pages11
JournalChemistry - An Asian Journal
Volume7
Issue number7
DOIs
Publication statusPublished - 2012 Jun 1

Keywords

  • aggregation
  • explosive materials
  • fluorescence
  • polymers
  • sensors

ASJC Scopus subject areas

  • Biochemistry
  • Organic Chemistry

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