Amperometric nitric oxide sensor based on nanoporous platinum phthalocyanine modified electrodes.
Anal Chem
; 85(1): 107-13, 2013 Jan 02.
Article
em En
| MEDLINE
| ID: mdl-23173722
ABSTRACT
This article describes the fabrication of electropolymerized Metallo 4', 4â³, 4â´, 4'''' tetra-amine phthalocyanine (poly-MTAPc) modified electrodes for the detection of nitric oxide (NO) in phosphate-buffered saline (PBS) at pH 7.4. A two-step synthetic protocol using a laboratory microwave reactor was adopted to provide three MTAPc complexes bearing different metal centers (M = Cu(2+) CuTAPc, M = Zn(2+) ZnTAPc, and M = Pt(2+) PtTAPc). The MTAPc complexes and the intermediates were characterized by MALDI-TOF mass spectrometry, UV-vis spectroscopy, (1)H NMR spectroscopy, and elemental analysis. The MTAPc products were separately electropolymerized either onto a glassy carbon (GC) electrode as a thin-film or within the pores of Anodisc nanoporous alumina membrane as a densely packed array of poly-MTAPc nanotubes to produce two electrode systems. In the latter system, the surface area enhancement provided by the nanotube-arrayed morphology of the poly-MTAPc enabled a high faradaic (signal) to capacitative (background) current during NO electro-oxidation. Amperometric detection of NO using these two electrode systems shows that the sensitivity and linear ranges were insensitive to the metal centers (M = Cu(2+), Zn(2+), and Pt(2+)) of the poly-MTAPc material.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Platina
/
Técnicas Eletroquímicas
/
Indóis
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Óxido Nítrico
Idioma:
En
Revista:
Anal Chem
Ano de publicação:
2013
Tipo de documento:
Article
País de afiliação:
Singapura