Regioselective imprinting of anthracenecarboxylic acids onto TiO 2 gel ultrathin films: An approach to thin film sensor

Seung Woo Lee, Do Hyeon Yang, Toyoki Kunitake

研究成果: Contribution to journalArticle査読

50 被引用数 (Scopus)

抄録

Ultrathin films of titanium oxide gel were imprinted with aromatic carboxylic acids, e.g. 4-(4-propyloxyphenylazo)-benzoic acid (C 3AzoCO2H) and anthracenecarboxylic acids (2-AnCO 2H and 9-AnCO2H), by repeatedly immersing a gold-coated quartz crystal microbalance (QCM) electrode or a quartz plate in a mixed solution of given carboxylic acids and titanium-n-butoxide (Ti(O- nBu)4) in toluene/ethanol. Regular film growth was confirmed by frequency shifts of QCM measurement and by appearance of the absorption for aromatic moieties in UV-visible spectroscopy. The template molecules were completely removed upon treatment with 1% ammonia solution. The resulting films showed sensitive mass increases for guest binding of various carboxylic acids, and the isomeric structure of the two anthracenecarboxylic acids (2- and 9-isomers) was discriminated by the imprinted films. Together with our previous results, major molecular selectivities - functional selectivity, structural selectivity, regioselectivity, and enantioselectivity - are all achieved by imprinted TiO2 gel films.

本文言語英語
ページ(範囲)35-42
ページ数8
ジャーナルSensors and Actuators, B: Chemical
104
1
DOI
出版ステータス出版済み - 1 3 2005

All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 器械工学
  • 凝縮系物理学
  • 表面、皮膜および薄膜
  • 金属および合金
  • 電子工学および電気工学
  • 材料化学

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