Potentiometric and Fiber Optic Sensors for pH Based on an Electropolymerized Cobalt Porphyrin

John R. Allen; Leonidas G. Bachas; Sylvia Daunert; Timothy L. Blair

doi:10.1021/ac00063a039

Potentiometric and Fiber Optic Sensors for pH Based on an Electropolymerized Cobalt Porphyrin

John R. Allen, Leonidas G. Bachas, Sylvia Daunert, Timothy L. Blair

Research output: Contribution to journal › Article › peer-review

70 Scopus citations

Abstract

Potentiometric and fiber optic sensors based on polymer films were prepared by electrodeposition of the ion-carrier monomer cobalt(II) tetrakis (p-hydroxyphenyl)porphyrin, [Co(p-OH)TPP]. Fiber optic sensors were developed by electropolymerization of the porphyrin on the surface of indium(tin) oxide glass slides. The optical sensors were highly selective to pH, presenting minimal interferences from anions. They had a linear response from pH 8 to 12. Potentiometric sensors were prepared from porphyrin films electrode-posited on glassy-carbon disk electrodes. These electrodes gave a near-Nernstian response to pH from pH 2 to 12 with minimal interferences.

Original language	English (US)
Pages (from-to)	2155-2158
Number of pages	4
Journal	Analytical Chemistry
Volume	65
Issue number	15
DOIs	https://doi.org/10.1021/ac00063a039
State	Published - Aug 1 1993
Externally published	Yes

ASJC Scopus subject areas

Analytical Chemistry

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title = "Potentiometric and Fiber Optic Sensors for pH Based on an Electropolymerized Cobalt Porphyrin",

abstract = "Potentiometric and fiber optic sensors based on polymer films were prepared by electrodeposition of the ion-carrier monomer cobalt(II) tetrakis (p-hydroxyphenyl)porphyrin, [Co(p-OH)TPP]. Fiber optic sensors were developed by electropolymerization of the porphyrin on the surface of indium(tin) oxide glass slides. The optical sensors were highly selective to pH, presenting minimal interferences from anions. They had a linear response from pH 8 to 12. Potentiometric sensors were prepared from porphyrin films electrode-posited on glassy-carbon disk electrodes. These electrodes gave a near-Nernstian response to pH from pH 2 to 12 with minimal interferences.",

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AU - Blair, Timothy L.

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