Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Carbon Monoxide Sensor Based on a B2HDDT-doped PEDOT:PSS Layer

  • Memarzadeh, R. (Department of Materials Science & Engineering, Shiraz University) ;
  • Noh, Hui-Bog (Department of Chemistry and Institute of BioPhysio Sensor Technology, Pusan National University) ;
  • Javadpour, S. (Department of Materials Science & Engineering, Shiraz University) ;
  • Panahi, F. (Department of Chemistry, College of Sciences, Shiraz University) ;
  • Feizpour, A. (Department of Chemistry and the Photonics Center, Boston University) ;
  • Shim, Yoon-Bo (Department of Chemistry and Institute of BioPhysio Sensor Technology, Pusan National University)
  • Received : 2013.04.24
  • Accepted : 2013.05.07
  • Published : 2013.08.20
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Abstract

An efficient carbon monoxide (CO) sensor was developed based on poly(3,4-ethylenedioxy)thiophenepoly(styrenesulfonate) (PEDOT:PSS) modified with a new pyrimidine-fused heterocyclic compound, bis(2-hydroxyphenyl)dihydropyrido[2,3-d:6,5-d]dipyrimidine-tetraone (B2HDDT). B2HDDT remains stable in the polymer matrix through interactions with functional groups of the polymer. It created prominent sites that captured CO gas, and the experimental parameters, including the amount of doped B2HDDT in the PEDOT:PSS film, were optimized. The sensor probe was also examined to verify its reliability for detecting CO in the presence of atmospheric gases in a discriminating manner. NMR, AFM, and FT-IR spectra were obtained to evaluate the structure and morphology of the B2HDDT-doped PEDOT:PSS (PEDOT:PSS/B2HDDT) film. The content of 35 vol % B2HDDT (7.0 mM) in PEDOT:PSS provided the largest response factor (${\Delta}R/R_o$) for the CO gas. The sensor response was reproducible, with a relative standard deviation < 5% (n = 5). The detection limit was determined to be $0.44{\pm}0.05$ vol %.

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