Azacalix[3]arene-carbazole conjugated polymer network ultrathin films for specific cation sensing

Chatthai Kaewtong, Guoqian Jiang, Yushin Park, Tim Fulghum, Akira Baba, Buncha Pulpoka, Rigoberto Advincula

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23 Citations (Scopus)

Abstract

Developing highly selective and sensitive chemical sensors is a challenge with respect to new materials for chemical recognition. In this study, a new conjugated polymer network precursor, hexahomotriazacalix[3]arene-carbazole has been synthesized and electrochemically cross-linked to form ultrathin films using cyclic voltammetry. The incorporation of hexahomotriazacalix[3]arene moiety as a neutral cation-binding receptor into a conjugated polycarbazole network facilitates high selectivity and sensitivity for Zn2+. The ultrathin films were characterized spectroscopically using UV-vis absorption and fluorescence spectroscopy. Surface morphology properties were examined by atomic force microscopy. Electrochemical deposition parameters and sensor transduction was studied by an electrochemical quartz crystal microbalance, surface plasmon resonance spectroscopy, and open-circuit potentiometry techniques. The results indicate that the high selectivity and sensitivity for Zn2+ compared to those of other cations is due to the combined size and dipole specificity of the azacalixarene unit and nonspecific ionic interaction with the redox couple of the conjugated polycarbazole units.

Original languageEnglish
Pages (from-to)4915-4924
Number of pages10
JournalChemistry of Materials
Volume20
Issue number15
DOIs
Publication statusPublished - 2008 Aug 12
Externally publishedYes

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ASJC Scopus subject areas

  • Materials Chemistry
  • Materials Science(all)

Cite this

Kaewtong, C., Jiang, G., Park, Y., Fulghum, T., Baba, A., Pulpoka, B., & Advincula, R. (2008). Azacalix[3]arene-carbazole conjugated polymer network ultrathin films for specific cation sensing. Chemistry of Materials, 20(15), 4915-4924. https://doi.org/10.1021/cm800284h