Thickness-shear-mode acoustic wave sensor for acetone vapour coated with C-ethylcalix[4]resorcinarene and C-H⃛π interactions as a molecular recognition mechanism

Zhong Cao, Kazutaka Murayama, Katsuyuki Aoki

研究成果: Article査読

41 被引用数 (Scopus)

抄録

The frequency response characteristics for 21 organic vapours by piezoelectric thickness-shear-mode (TSM) acoustic wave sensors coated with four calixarenes have been investigated. The results reveal that C-ethylcalix[4]resorcinarene (CECRA) is the most efficient adsorptive material for acetone. The decreased frequency values of the TSM sensor are linearly correlated to the concentration of acetone vapour in the 0-2280 ppm range with the detection limit of 1.25 ppm when the coating mass of CECRA is 18.5 μg. The adsorption and desorption response kinetics have been examined in detail, and the polynomial curve equations for the different processes have been obtained by data fitting with the least square regression method. The proposed sensor exhibits good reversibility, reproducibility, and stability for the determination of acetone vapour. No significant interference is observed from organic hydrophobic molecules such as alkanes, halohydrocarbons and aromatic hydrocarbons. By comparison with the gas chromatography method, the proposed sensor can be used for the determination of acetone vapour in air with the recovery of 96.8-104.2%. X-ray single crystal structure analyses of three complexes formed between CECRA and acetone molecules suggest a recognition mechanism in which an acetone molecule is captured as a guest in the cavity of a CECRA host molecule through C-H···π interactions between the methyl groups of acetone and the phenyl rings of CECRA.

本文言語English
ページ(範囲)47-59
ページ数13
ジャーナルAnalytica Chimica Acta
448
1-2
DOI
出版ステータスPublished - 2001 12 3
外部発表はい

ASJC Scopus subject areas

  • 分析化学
  • 生化学
  • 環境化学
  • 分光学

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