Direct Electrochemistry and Electrocatalysis of Hemoglobin Immobilized in a Polymeric Ionic Liquid Film |
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| Authors: | Qian Zhang Xue Lv Yun Qiao Ling Zhang Da‐Liang Liu Wei Zhang Guang‐Xi Han Xi‐Ming Song |
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| Institution: | 1. Liaoning Provincial Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials, Liaoning University, Shenyang 110036, P.?R. China;2. College of Chemistry, Liaoning University, Shenyang 110036, P.?R. China;3. College of Chemistry and Life Science, Shenyang Normal University, Shenyang 110034, P.?R. China |
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| Abstract: | A polymer film based on polymeric ionic liquid, which was poly(1‐vinyl‐3‐butylimidazolium chloride) (poly(ViBuIm+Cl?)for short), was firstly used as matrix to immobilize hemoglobin (Hb). FTIR and UV‐vis spectra demonstrated that the native structure of Hb was well preserved after entrapped into the polymer film. The Hb immobilized in the poly(ViBuIm+Cl?) film showed a fast direct electron transfer for the Hb‐FeIII/FeII redox couple. Based on the direct electron transfer of the immobilized Hb, polyvinyl alcohol (PVA)/Hb/poly(ViBuIm+Cl?)/GC electrode displayed good sensitivity and wide linear range for the detection of H2O2. The linear range of the PVA/Hb/poly(ViBuIm+Cl?)/GC electrode to H2O2 is from 3.5 to 224 μM with a limit of detection of 1.17 μM. Such an avenue, which integrated polymeric ionic liquid and redox protein via a simple method, may provide a novel and efficient platform for the fabrication of biosensors, biofuel cells and other bioelectrochemical devices. |
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| Keywords: | Polymeric ionic liquid Hemoglobin Direct electrochemistry Electrocatalysis Biosensors |
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