Electrodeposition of enantioselective inherently chiral electrode surfaces: from traditional media to RTILs
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Data di Pubblicazione:
2013
Citazione:
Electrodeposition of enantioselective inherently chiral electrode surfaces: from traditional media to RTILs / F. Sannicolò, S. Arnaboldi, V. Bonometti, M. Magni, P.R. Mussini, W. Kutner, K. Noworyta, T. Benincori, S. Rizzo, R. Cirilli, M. Panigati, S. Abbate, G. Longhi, E. Castiglioni. ((Intervento presentato al convegno GEI Giornate dell’Elettrochimica Italiana tenutosi a Pavia nel 2013.
Abstract:
Thiophene-based inherently chiral conducting films, under development in our
research group, have very high and stable chiral activity, depending on a tailored
torsion of the whole conducting backbone rather than on attached chiral pendants;
accordingly, such chirality is modulable by the amount of injected charge (reducing
the torsion angle to achieve better system conjugation), a phenomenon which
suggested us the image of a breathing system.
Perfectly specular electrode surfaces have been prepared by electrodeposition cycles,
starting from the corresponding inherently chiral oligomers. To finely discriminate
among the racemate and enantiomer film properties, and above all to achieve enantioselective
electrode surfaces for applications in the electroanalysis and electrocatalysis
domains, reproducibility is a necessary but hard task. In this context, preliminary
literature studies [1,2] point to room temperature ionic liquids RTIL, both as such and
as co-solvents, significantly improving the regularity and the mechanical and morphological
properties of electrodeposited conducting molecular films. In this frame,
we have carried out an extensive study aimed to the rationalization of the conducting
film features obtained in different conditions (i.e., RTILs vs non polar and polar VOCs,
on various electrodes), both on model starting monomers (EDOT and EDOP) and on
our newly developed inherently chiral ones. In particular, enantiomer film deposition
from RTILs on screen-printed electrodes afforded reproducible and repeatable
enantiorecognition ability of the specular electrode surfaces towards specular probes.
Tipologia IRIS:
14 - Intervento a convegno non pubblicato
Elenco autori:
F. Sannicolò, S. Arnaboldi, V. Bonometti, M. Magni, P.R. Mussini, W. Kutner, K. Noworyta, T. Benincori, S. Rizzo, R. Cirilli, M. Panigati, S. Abbate, G. Longhi, E. Castiglioni
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