Structure, Stability, and Electronic Interactions of Polyoxometalates on Functionalized Graphene Sheets

Polyoxometalates supported on oxygen- and alkyl-functionalized graphene sheets were investigated

Jean-Philippe Tessonnier; Stephanie Goubert-Renaudin; Shaun Alia; Yushan Yan; Mark A. Barteau

2012

Key concepts

Scholarcy highlights

  • Polyoxometalates supported on oxygen- and alkyl-functionalized graphene sheets were investigated
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  • Discrete molecular species were directly observed by electron microscopy at loadings below 20 wt.%
  • The interaction between the polyoxometalates and the graphene surface was found to significantly impact their vibrational spectra and a linear correlation between the frequency of the M-Oc-M vibration and the dispersion was evidenced by FTIR
  • While bulk-like electronic properties were observed for small aggregates, UV–vis spectroscopy and cyclic voltammetry revealed changes in the electronic structure of isolated molecular species as a result of their interaction with graphene
  • Because of the ability to disperse alkyl-functionalized graphene in a variety of polar and nonpolar solvents, the materials synthesized in this work provide an opportunity to disperse polyoxometalates in media in which they would not dissolve if unsupported

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