In the frame of our research activity on covalent anchoring of functional molecules on Si oriented surfaces, we report here on the hybrid species resulting from the reaction of ethynylferrocene with H-Si(100) either in a single, direct step, or after production of a self-assembled alpha,omega-bifunctional alkyl monolayer. In the former approach, a short Si-C covalent bond is established through visible-light activation of the unsaturated side arm of ethynylferrocene via an extra-mild approach. In the latter case, an azide-alkyne Huisgen cycloaddition reaction ("click" chemistry) is induced between the C C group of the molecule and the -N-3 terminations of undecyl hydrocarbon chains pre-assembled onto H-Si(100). These two routes lead to electroactive monolayers wherein the ferrocene head groups are respectively located close to or far from the Si surface. This allows for a fine tuning of the properties of the resulting hybrids on Si, in terms of distinct redox potentials, electron transfer rate constants, oxidation resistance. The different reaction steps have been monitored with X-ray Photoelectron Spectroscopy (XPS), in order to evaluate the presence and the chemical nature of the anchored species, while electrochemical measurements have evidenced reversible redox responses of the resulting SAMs.

Molecular and electronic properties transferred to silicon via wet-chemistry surface nanofunctionalization / Zanoni, Robertino; Boccia, A.; Cattaruzza, F.; Cossi, M.; Decker, F.; Iozzi, M. F.; Marrani, Andrea Giacomo; Lanzilotto, V.. - 10:4(2008), pp. 2901-2907. (Intervento presentato al convegno .2nd International Conference on Advanced Nano Materials (ANM 2008) tenutosi a Aveiro; Portugal nel 22-25/06/2008).

Molecular and electronic properties transferred to silicon via wet-chemistry surface nanofunctionalization

ZANONI, Robertino;MARRANI, Andrea Giacomo;V. LANZILOTTO
2008

Abstract

In the frame of our research activity on covalent anchoring of functional molecules on Si oriented surfaces, we report here on the hybrid species resulting from the reaction of ethynylferrocene with H-Si(100) either in a single, direct step, or after production of a self-assembled alpha,omega-bifunctional alkyl monolayer. In the former approach, a short Si-C covalent bond is established through visible-light activation of the unsaturated side arm of ethynylferrocene via an extra-mild approach. In the latter case, an azide-alkyne Huisgen cycloaddition reaction ("click" chemistry) is induced between the C C group of the molecule and the -N-3 terminations of undecyl hydrocarbon chains pre-assembled onto H-Si(100). These two routes lead to electroactive monolayers wherein the ferrocene head groups are respectively located close to or far from the Si surface. This allows for a fine tuning of the properties of the resulting hybrids on Si, in terms of distinct redox potentials, electron transfer rate constants, oxidation resistance. The different reaction steps have been monitored with X-ray Photoelectron Spectroscopy (XPS), in order to evaluate the presence and the chemical nature of the anchored species, while electrochemical measurements have evidenced reversible redox responses of the resulting SAMs.
2008
.2nd International Conference on Advanced Nano Materials (ANM 2008)
Functionalization of Silicon; "Click" Chemistry; Self-Assembled-Monolayers
04 Pubblicazione in atti di convegno::04b Atto di convegno in volume
Molecular and electronic properties transferred to silicon via wet-chemistry surface nanofunctionalization / Zanoni, Robertino; Boccia, A.; Cattaruzza, F.; Cossi, M.; Decker, F.; Iozzi, M. F.; Marrani, Andrea Giacomo; Lanzilotto, V.. - 10:4(2008), pp. 2901-2907. (Intervento presentato al convegno .2nd International Conference on Advanced Nano Materials (ANM 2008) tenutosi a Aveiro; Portugal nel 22-25/06/2008).
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/191197
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