Molecularly imprinted TiO(2) thin film using stable ground-state complex as template as applied to selective electrochemical determination of mercury.

Molecular recognition sites for mercury ions were imprinted in TiO(2) film using stable ground-state complex of 1-amino-8-naphtol-3,6-disodium sulfonate (ANDS) and mercury ions as template. The complex ratio between mercury ions and ANDS was estimated to be 2:1. Compared with the controlled and pure TiO(2) electrodes, the imprinted electrode revealed selectivity towards the imprinted ions. Linear calibration plots for mercury ions were obtained and the regression equation was I(p) (muA)=4.29x10(-7)+19.40 [Hg(2+)] with a detection limit of 3.06x10(-9)mol/l. The imprinted electrode could be used for more than 1 month. Recoveries were calculated at both high and low concentrations, with a mean recovery of 99.6%.

[1]  Klaus Mosbach,et al.  Drug assay using antibody mimics made by molecular imprinting , 1993, Nature.

[2]  Félix Sancenón,et al.  Fluorogenic and chromogenic chemosensors and reagents for anions. , 2003, Chemical reviews.

[3]  T. Bayer,et al.  Development of ion-sensitive field-effect transistor-based sensors for benzylphosphonic acids and thiophenols using molecularly imprinted TiO2 films , 2004 .

[4]  G. Wulff,et al.  Molekulares Prägen (Imprinting) in vernetzten Materialien mit Hilfe von Matrizenmolekülen – auf dem Weg zu künstlichen Antikörpern , 1995 .

[5]  T. Rao,et al.  Ion imprinted polymer particles: synthesis, characterization and dysprosium ion uptake properties suitable for analytical applications , 2003 .

[6]  Buddy D. Ratner,et al.  Template-imprinted nanostructured surfaces for protein recognition , 1999, Nature.

[7]  R. Yu,et al.  Selective electrochemical molecular recognition of benzenediol isomers using molecularly imprinted TiO2 film electrodes , 2004 .

[8]  Klaus Mosbach,et al.  Competitive amperometric morphine sensor based on an agarose immobilised molecularly imprinted polymer , 1995 .

[9]  Liang Feng,et al.  Molecularly imprinted TiO2 thin film by liquid phase deposition for the determination of L-glutamic acid. , 2004, Langmuir : the ACS journal of surfaces and colloids.

[10]  K. Mosbach,et al.  Molecularly imprinted polymers and their use in biomimetic sensors. , 2000, Chemical reviews.

[11]  Arturo J. Miranda-Ordieres,et al.  Electrochemical sensors based on molecularly imprinted polymers , 2004 .

[12]  R. S. Nicholson,et al.  Theory of Stationary Electrode Polarography. Single Scan and Cyclic Methods Applied to Reversible, Irreversible, and Kinetic Systems. , 1964 .

[13]  Huang-Hao Yang,et al.  Molecularly imprinted sol-gel nanotubes membrane for biochemical separations. , 2004, Journal of the American Chemical Society.

[14]  I. Willner,et al.  Tailored chemosensors for chloroaromatic acids using molecular imprinted TiO2 thin films on ion-sensitive field-effect transistors. , 2001, Analytical chemistry.

[15]  R. Thummel,et al.  Fluorescence Quenching by Pyridine and Derivatives Induced by Intermolecular Hydrogen Bonding to Pyrrole-Containing Heteroaromatics† , 2002 .

[16]  M. C. Blanco-López,et al.  Electrochemical sensing with electrodes modified with molecularly imprinted polymer films , 2004, Analytical and bioanalytical chemistry.

[17]  A novel electrosynthesized polymer applied to molecular imprinting technology. , 2003, Talanta.

[18]  M. Collinson,et al.  Template Recognition in Inorganic−Organic Hybrid Films Prepared by the Sol−Gel Process , 1998 .

[19]  Izumi Ichinose,et al.  Molecular Imprinting of Azobenzene Carboxylic Acid on a TiO2 Ultrathin Film by the Surface Sol-Gel Process , 1998 .

[20]  M. B. Saleh,et al.  Novel mercury (II) ion-selective polymeric membrane sensor based on ethyl-2-benzoyl-2-phenylcarbamoyl acetate. , 2000, Talanta.

[21]  K Mosbach,et al.  Assay system for the herbicide 2,4-dichlorophenoxyacetic Acid using a molecularly imprinted polymer as an artificial recognition element. , 1998, Analytical chemistry.

[22]  W. Wang,et al.  Building fluorescent sensors for carbohydrates using template-directed polymerizations. , 2001, Bioorganic chemistry.

[23]  C. Baggiani,et al.  Binding properties of 2,4,5-trichlorophenoxyacetic acid-imprinted polymers prepared with different molar ratios between template and functional monomer. , 2004, Talanta.

[24]  W. Rettig,et al.  Photoinduced intramolecular charge transfer in planar vs. twisted donor-acceptor terphenyls , 1997 .