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Issue 42, 2016
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Modulation of the exfoliated graphene work function through cycloaddition of nitrile imines

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Abstract

After the feasibility of the 1,3-dipolar cycloaddition reaction between nitrile imines and exfoliated graphene by density functional theory calculations was proved, very few-layer graphene was effectively functionalized using this procedure. Hydrazones with different electronic properties were used as precursors for the 1,3-dipoles, and microwave irradiation as an energy source enabled the reaction to be performed in a few minutes. The anchoring of organic addends on the graphene surface was confirmed by Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) and thermogravimetric analysis. Ultraviolet photoelectron spectroscopy (UPS) was used to measure the work function and band gap of these new hybrids. Our results demonstrate that it is possible to modulate these important electronic valence band parameters by tailoring the electron richness of the organic addends and/or the degree of functionalization.

Graphical abstract: Modulation of the exfoliated graphene work function through cycloaddition of nitrile imines

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Supplementary files

Article information


Submitted
29 Jul 2016
Accepted
27 Sep 2016
First published
30 Sep 2016

Phys. Chem. Chem. Phys., 2016,18, 29582-29590
Article type
Paper

Modulation of the exfoliated graphene work function through cycloaddition of nitrile imines

M. Barrejón, M. J. Gómez-Escalonilla, J. L. G. Fierro, P. Prieto, J. R. Carrillo, A. M. Rodríguez, G. Abellán, M. xmlns="http://www.rsc.org/schema/rscart38"> <. C. López-Escalante, M. Gabás, J. T. López-Navarrete and F. Langa, Phys. Chem. Chem. Phys., 2016, 18, 29582
DOI: 10.1039/C6CP05285A

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