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Electrochemistry and electrocatalysis of hemoglobin in Nafion/nano-CaCO3 film on a new ionic liquid BPPF6 modified carbon paste electrode.
J Phys Chem B. 2007 May 03; 111(17):4560-7.JP

Abstract

Room temperature ionic liquid N-butylpyridinium hexafluorophosphate (BPPF6) was used as a binder to construct a new carbon ionic liquid electrode (CILE), which exhibited enhanced electrochemical behavior as compared with the traditional carbon paste electrode with paraffin. By using the CILE as the basal electrode, hemoglobin (Hb) was immobilized on the surface of the CILE with nano-CaCO3 and Nafion film step by step. The Hb molecule in the film kept its native structure and showed good electrochemical behavior. In pH 7.0 Britton-Robinson (B-R) buffer solution, a pair of well-defined, quasi-reversible cyclic voltammetric peaks appeared with cathodic and anodic peak potentials located at -0.444 and -0.285 V (vs SCE), respectively, and the formal potential (E degrees') was at -0.365 V, which was the characteristic of Hb Fe(III)/Fe(II) redox couples. The formal potential of Hb shifted linearly to the increase of buffer pH with a slope of -50.6 mV pH-1, indicating that one electron transferred was accompanied with one proton transportation. Ultraviolet-visible (UV-vis) and Fourier transform infrared (FT-IR) spectroscopy studies showed that Hb immobilized in the Nafion/nano-CaCO3 film still remained its native arrangement. The Hb modified electrode showed an excellent electrocatalytic behavior to the reduction of H2O2, trichloroacetic acid (TCA), and NaNO2.

Authors+Show Affiliations

College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China. sunwei@qust.edu.cnNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

17425353

Citation

Sun, Wei, et al. "Electrochemistry and Electrocatalysis of Hemoglobin in Nafion/nano-CaCO3 Film On a New Ionic Liquid BPPF6 Modified Carbon Paste Electrode." The Journal of Physical Chemistry. B, vol. 111, no. 17, 2007, pp. 4560-7.
Sun W, Gao R, Jiao K. Electrochemistry and electrocatalysis of hemoglobin in Nafion/nano-CaCO3 film on a new ionic liquid BPPF6 modified carbon paste electrode. J Phys Chem B. 2007;111(17):4560-7.
Sun, W., Gao, R., & Jiao, K. (2007). Electrochemistry and electrocatalysis of hemoglobin in Nafion/nano-CaCO3 film on a new ionic liquid BPPF6 modified carbon paste electrode. The Journal of Physical Chemistry. B, 111(17), 4560-7.
Sun W, Gao R, Jiao K. Electrochemistry and Electrocatalysis of Hemoglobin in Nafion/nano-CaCO3 Film On a New Ionic Liquid BPPF6 Modified Carbon Paste Electrode. J Phys Chem B. 2007 May 3;111(17):4560-7. PubMed PMID: 17425353.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Electrochemistry and electrocatalysis of hemoglobin in Nafion/nano-CaCO3 film on a new ionic liquid BPPF6 modified carbon paste electrode. AU - Sun,Wei, AU - Gao,Ruifang, AU - Jiao,Kui, Y1 - 2007/04/11/ PY - 2007/4/12/pubmed PY - 2007/7/31/medline PY - 2007/4/12/entrez SP - 4560 EP - 7 JF - The journal of physical chemistry. B JO - J Phys Chem B VL - 111 IS - 17 N2 - Room temperature ionic liquid N-butylpyridinium hexafluorophosphate (BPPF6) was used as a binder to construct a new carbon ionic liquid electrode (CILE), which exhibited enhanced electrochemical behavior as compared with the traditional carbon paste electrode with paraffin. By using the CILE as the basal electrode, hemoglobin (Hb) was immobilized on the surface of the CILE with nano-CaCO3 and Nafion film step by step. The Hb molecule in the film kept its native structure and showed good electrochemical behavior. In pH 7.0 Britton-Robinson (B-R) buffer solution, a pair of well-defined, quasi-reversible cyclic voltammetric peaks appeared with cathodic and anodic peak potentials located at -0.444 and -0.285 V (vs SCE), respectively, and the formal potential (E degrees') was at -0.365 V, which was the characteristic of Hb Fe(III)/Fe(II) redox couples. The formal potential of Hb shifted linearly to the increase of buffer pH with a slope of -50.6 mV pH-1, indicating that one electron transferred was accompanied with one proton transportation. Ultraviolet-visible (UV-vis) and Fourier transform infrared (FT-IR) spectroscopy studies showed that Hb immobilized in the Nafion/nano-CaCO3 film still remained its native arrangement. The Hb modified electrode showed an excellent electrocatalytic behavior to the reduction of H2O2, trichloroacetic acid (TCA), and NaNO2. SN - 1520-6106 UR - https://www.unboundmedicine.com/medline/citation/17425353/Electrochemistry_and_electrocatalysis_of_hemoglobin_in_Nafion/nano_CaCO3_film_on_a_new_ionic_liquid_BPPF6_modified_carbon_paste_electrode_ L2 - https://doi.org/10.1021/jp067933n DB - PRIME DP - Unbound Medicine ER -