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The Stability Study of Pentacyano(4‐mercaptopyridine)ruthenate(II) Self‐Assembled Monolayer onto Gold Surface
Author(s) -
Diógenes Izaura Cirino Nogueira,
Nart Francisco Carlos,
Temperini Márcia Laudelina Arruda,
de Sousa Moreira Ícaro
Publication year - 2002
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/1521-4109(200201)14:2<153::aid-elan153>3.0.co;2-m
Subject(s) - monolayer , chemisorption , electrode , moiety , self assembled monolayer , chemistry , materials science , electrochemistry , analytical chemistry (journal) , photochemistry , nanotechnology , stereochemistry , organic chemistry , adsorption
The stability of the SAM formed by 4‐mercaptopyridine (pyS) coordinated to the [Ru(CN) 5 ] 3− moiety (RupyS) has been evaluated by SERS and LSV as function of the electrode immersion time in the modifier solution. The cathodic shift observed for the potential assigned to the RS–Au reductive electrode reaction of the RupySAu, comparatively to the pySAu, hints that the π back‐bonding effect enhances the chemisorption process. Contrary to that observed for the SAM of pyS on gold, the SERS spectra profiles acquired for the RupyS monolayer formed onto gold after longer immersion times indicated the absence of the structural conversion process.