Partial charge transfer of poly(vinylferrocene)-coated latex particles adsorbed on pyrolytic graphite electrode |
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| Institution: | 1. Otto-von-Guericke University Magdeburg, Process Systems Engineering, Universitätsplatz 2, D-39106 Magdeburg, Germany;2. Max Planck Institute for Dynamics of Complex Technical Systems, Process Systems Engineering, Sandtorstrasse 1, D-39106 Magdeburg, Germany;1. Department of Mechanical Engineering, Indian Institute of Technology Palakkad, Kerala 678557, India;2. Mikrotools Pte Ltd, Block-1002, Jalan Bukit Merah, Singapore 159456, Singapore;1. College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China;2. School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, China;3. Department of Mechanical & Electrical Engineering, Xiamen University, Xiamen 361005, China |
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| Abstract: | As a model of an electrode reaction of a big particle, vinylferrocene immobilized on polystyrene latex particles were synthesized by copolymerization with styrene sulfonate and styrene. They had almost mono-dispersed spheres with 1.2 μm in diameter, and each had 3.1 × 107 ferrocene units. The particles adsorbed on pyrolytic graphite electrode (PGE) showed the redox activity for the ferrocene unit in NaBF4 aqueous solution. Particles without the sulfonate group had no electroactivity, and hence the electroactivity needs ionic micro-environment around the ferrocene unit. From the faradaic charge of the ferrocene unit, the electroactive sites per particle were estimated to be about 8% of the whole immobilized ferrocene units. A model of this partial charge transfer was proposed, in which the particles are adsorbed in hollows of the rough surface of the PGE. |
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