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Oberflächenmodifikation von Kohlenstoff‐Elektroden durch Zweikomponenten‐Polymere, aufgebaut aus Epoxidharzen und einem Derivat von Vitamin B 12
Author(s) -
Ruhe Annette,
Walder Lorenz,
Scheffold Rolf
Publication year - 1985
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19850680525
Subject(s) - chemistry , electrosynthesis , monomer , polymer chemistry , polymer , electrochemistry , iodide , epoxy , amine gas treating , electrode , inorganic chemistry , organic chemistry
Surface Modification of Carbon Electrodes by Polymers Consisting of Epoxy Resins and a Derivative of Vitamin B 12 A derivative of vitamin B 12 containing a 3,5‐diaminobenzoyl group in the c side‐chain has been synthesized. It was used as the amine component in the formation of an optically active cross‐linked epoxy‐polymer. Surface modification of carbon electrodes (basal plane graphite and carbon felt) has been achieved by impregnating them with solutions of the monomers followed by thermal curing at 120°C. Electrochemical responses of the Co(II)/Co(I) redox system from sub‐mono to multilayer coverages have been observed. The polymer exhibits catalytic activities typical for monomeric vitamin B 12 as shown by spectroscopic and electrochemical techniques. Polymermodified electrodes with large specific surfaces have been used in organic electrosynthesis, i.e. the exclusive formation of valeronitrile by reductive cross‐coupling of ethyl iodide and acrylonitrile.