Molecular imprinting of azobenzene carboxylic acid on a TiO2 ultrathin film by the surface sol-gel process

Seung Woo Lee, Izumi Ichinose, Toyoki Kunitake

Research output: Contribution to journalArticle

150 Citations (Scopus)

Abstract

Ultrathin films of titanium oxide gel imprinted with 4-(4-propyloxyphenylazo)benzoic acid (C3AzoCC2H) were prepared by repeated immersion of a gold-coated quartz crystal microbalance (QCM) electrode or a quartz plate in solutions of C3AzoCO2H and titanium butoxide (Ti(O-nBu)4) in toluene/ethanol. Regular film growth was confirmed by frequency decrement in QCM measurements and by the appearance of the azobenzene absorption in UV-vis spectroscopy. The template molecule could be completely removed upon treatment with 1% aqueous ammonia. The resulting films showed saturation binding of the template molecule in acetonitrile in less than 1 min. Binding of the template molecule was greatest among aromatic carboxylic acids that are structurally related to the template. A related ester showed a significant reduction in the binding efficiency. The surface sol-gel process provides a powerful tool for molecular imprinting in ultrathin metal oxide films.

Original languageEnglish
Pages (from-to)2857-2863
Number of pages7
JournalLangmuir
Volume14
Issue number10
Publication statusPublished - May 12 1998

Fingerprint

Azobenzene
Ultrathin films
sol-gel processes
Carboxylic Acids
Carboxylic acids
carboxylic acids
Sol-gel process
templates
Quartz crystal microbalances
Molecules
quartz crystals
microbalances
Quartz
Benzoic Acid
Benzoic acid
Titanium oxides
Toluene
Film growth
Titanium
Ultraviolet spectroscopy

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

Cite this

Molecular imprinting of azobenzene carboxylic acid on a TiO2 ultrathin film by the surface sol-gel process. / Lee, Seung Woo; Ichinose, Izumi; Kunitake, Toyoki.

In: Langmuir, Vol. 14, No. 10, 12.05.1998, p. 2857-2863.

Research output: Contribution to journalArticle

Lee, SW, Ichinose, I & Kunitake, T 1998, 'Molecular imprinting of azobenzene carboxylic acid on a TiO2 ultrathin film by the surface sol-gel process', Langmuir, vol. 14, no. 10, pp. 2857-2863.
Lee, Seung Woo ; Ichinose, Izumi ; Kunitake, Toyoki. / Molecular imprinting of azobenzene carboxylic acid on a TiO2 ultrathin film by the surface sol-gel process. In: Langmuir. 1998 ; Vol. 14, No. 10. pp. 2857-2863.
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