Issue 2, 2012
From the journal:

Analyst

Effect of hydrophilicity of room temperature ionic liquids on the electrochemical and electrocatalytic behaviour of choline oxidase

Parvaneh Rahimi,ab   Hedayatollah Ghourchian*a  and  Sharareh Sajjadia  

* Corresponding authors

a Laboratory of Microanalysis, Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
E-mail: hadi@ibb.ut.ac.ir
Fax: +98 21 66404680
Tel: +98 21 66408920

b Center of Excellence in Electrochemistry, Faculty of Chemistry, University of Tehran, Tehran, Iran

Abstract

In the present report, six different nano-composites contaning the same amine functionalized multi-walled carbon nanotubes (NH2-MWCNTs) but different room temperature ionic liquids (RTILs) were prepared. Then, the efficiency of these nano-composites as supporting materials for studying the electrochemistry and electrocatalysis of choline oxidase (ChOx) as a model enzyme were compared. The corresponding cyclic voltammetric and amperometric data showed that the electrocatalytic activity and the electroanalytical performance of immobilized ChOx depends on the degree of hydrophilicity of RTILs used in the applied nano-composite. The higher stability (180 days), higher enzyme loading (6.56 mol cm−2), lower detection limit (3.85 μM) and wider linear range (0.005–0.8 mM) was obtained for the most hydrophilic RTIL (1-allyl-3-methylimidazolium bromide).

Graphical abstract: Effect of hydrophilicity of room temperature ionic liquids on the electrochemical and electrocatalytic behaviour of choline oxidase

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Article information

DOI
https://doi.org/10.1039/C1AN15732A
Article type
Paper
Submitted
10 Aug 2011
Accepted
07 Nov 2011
First published
02 Dec 2011

Analyst, 2012,137, 471-475

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Effect of hydrophilicity of room temperature ionic liquids on the electrochemical and electrocatalytic behaviour of choline oxidase

P. Rahimi, H. Ghourchian and S. Sajjadi, Analyst, 2012, 137, 471 DOI: 10.1039/C1AN15732A

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