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Toward the Control of the Creation of Mixed Monolayers on Glassy Carbon Surfaces by Amine Oxidation
Author(s) -
Groppi Jessica,
Bartlett Philip N.,
Kilburn Jeremy D.
Publication year - 2016
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201503120
Subject(s) - osmium , amine gas treating , anthraquinone , glassy carbon , cyclic voltammetry , redox , monolayer , deprotonation , electrochemistry , chemistry , carbon fibers , photochemistry , polymer chemistry , inorganic chemistry , organic chemistry , materials science , electrode , catalysis , ion , biochemistry , composite material , composite number , ruthenium
A versatile and simple methodology for the creation of mixed monolayers on glassy carbon (GC) surfaces was developed, using an osmium–bipyridyl complex and anthraquinone as model redox probes. The work consisted in the electrochemical grafting on GC of a mixture of mono‐protected diamine linkers in varying ratios which, after attachment to the surface, allowed orthogonal deprotection. After optimisation of the deprotection conditions, it was possible to remove one of the protecting groups selectively, couple a suitable osmium complex and cap the residual free amines. The removal of the second protecting group allowed the coupling of anthraquinone. The characterisation of the resulting surfaces by cyclic voltammetry showed the variation of the surface coverage of the two redox centres in relation to the initial ratio of the linking amine in solution.