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title: Composite system based on chitosan and room-temperature ionic liquid: Direct electrochemistry and electrocatalysis of hemoglobin
author: Lu, XB;  Hu, JQ;  Yao, X;  Wang, ZP;  Li, JH
Issued Date: 2006
Abstract: A novel polymer/room-temperature ionic liquid (RTIL) composite material based on chitosan (Chi) and 1-butyl-3-methyl-imidazolium tetrafluoroborate (BMIMBF4) was explored. The composite system can be readily used as an immobilization matrix to entrap proteins and enzymes. Hemoglobin (Hb) was chosen as a model protein to investigate the composite system. A pair of well-defined quasireversible redox peaks of hemoglobin were obtained at the Chi-BMIMBF4-Hb composite-film-modified glassy carbon (GC) electrode by direct electron transfer between the protein and the GC electrode. Dramatically enhanced biocatalytic activity was exemplified at the Chi-BMIMBF4-Rb/GC electrode by the reduction of oxygen and trichloroacetic acid. Thermogravimetric analysis (TGA) suggests that the Chi-BMIMBF4-Hb composite has higher thermal stability than Chi-Hb itself. The Chi-BMIMBF4-Hb film was also characterized by UV-visible spectra, indicating excellent stability in solution and good biocompatibility for protein. The unique composite material based on polymer and ionic liquid can find wide potential applications in direct electrochemistry, biosensors, and biocatalysis.
Related URLs: 10.1021/bm050933t
Appears in Collections:文献共享_期刊论文

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全文许可: Creative Commons 署名-非商业性使用-相同方式共享 3.0

Recommended Citation:
Lu, XB,Hu, JQ,Yao, X,et al. Composite System Based On Chitosan And Room-temperature Ionic Liquid: Direct Electrochemistry And Electrocatalysis Of Hemoglobin[J]. Biomacromolecules,2006,7(3):975-980.

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