title: Potentiometric pH sensors based on chemically modified electrodes with electropolymerized metal-tetraaminophthalocyanine.
abstract: Potentiometric pH sensors based on polymer film were prepared by electropolymerization of the monomer nickel(II)-4,4',4'',4'''-tetraaminophthalocyanine (NiTAPc) or copper(II)-4,4',4'',4'''-tetraaminophthalocyanine (CuTAPc) on glassy carbon (GC) electrodes. The polymer of metal tetraaminophthalocyanine (p-MTAPc) film coated electrodes show a slope of 55 +/- 1 mV/pH (at 20 degrees C) and nearly Nernstain potentiometric response to pH over the range of pH 1-13. The electrodes possess good potential reproducibility and high selectivity, and are useful sensing devices in pH determination and end-point indication of acid-base potentiometric titration.
authors.affiliation: Department of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, People's Republic of China.
authors.forename: T F
authors.initials: TF
authors.lastname: Kang
authors.forename: Z Y
authors.initials: ZY
authors.lastname: Xie
authors.forename: H
authors.initials: H
authors.lastname: Tang
authors.forename: G L
authors.initials: GL
authors.lastname: Shen
authors.forename: R Q
authors.initials: RQ
authors.lastname: Yu