Molecularly Imprinted Polypyrrole for Sensor Design
Keywords:
polymer chemistry, molecular recognition, qualitative analysis, electrochemistry, surface science, caffeine, nanotechnology.Abstract
design of chemical sensor sensitive to caffeine. Electrochemical potential pulls technique has been applied for synthesis of molecularly imprinted polypyrrole (mPpy) and its deposition on electrode surface. Caffeine was used as a template for molecular imprinting of polypyrrole. Pulsed amperometric detection (PAD) was applied for the control of dedoping/redoping of mPpy by caffeine and detection of caffeine binding to the mPpy. The evaluation of analytical signals and dedoping of molecularly imprinted polypyrrole has been tested and correspondingly described by exponential decay and exponential increase to maximum equations. The dependence of analytical signal on concentration of caffeine in the sample can be successfully described by hyperbola equation. The sensor was applied for detection of caffeine in diluted coffee samples.
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