Third Microsymposium of the "International Scholarship Program for Graduate Studies in Faculty of Chemistry, University of Warsaw - From simple molecules to nanostructured and bioactive materials" October 6 - 8th, 2011, Palace in Łochów, Poland
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Thursday Oct. 6th 15:30 -16:00 – Wiktor Lewandowski Soluble in water, surface modified graphene The chemical modification of nano- or micromolecular surfaces is widely used for the precise structural and/or electrical manipulation of bulk materials. In particular, atomically thin graphitic molecules such as fullerenes, carbon nanotubes, and graphene display pronounced physicochemical and electronic changes after synthetic derivatization of their surfaces [1]. Up to date only few synthetic methods currently exist to covalently functionalize the surface of graphene, usually based on graphite oxidation to graphite oxide (GO), it’s reduction and surface functionalization to reduced graphite oxide (rGO) [2]. In our research we have used graphite to produce graphite oxide. The latter was subsequently engaged in Eschenmoser-Claisen sigmatropic rearrangement reaction [3]. It is the first report using allylic character of hydroxyl GO moieties. The installed groups were saponified which allowed us to obtain conductive, water-soluble material with rGO character. XPS, IR, TGA, TEM, AFM, XRD measurements confirmed the course of reaction. An conspicuous feature of this material is it’s uniformity and possibility of control over the functional groups density. The chemical character of carboxyl groups allows for combining the obtained material with biomolecules or nanoparticles which should be of great use in building biosensors and nanocatalysts. [1] D. M. Guldi, G. M. A. Rahman, V. Sgobba, C. Ehli A. Nazwisko, Chem. Soc. Rev., 35 (2006) 471 [2] K. P . Loh, Q. Bao, P. K. Ang, J. Yang, J. Mater. Chem., 20 (2010), 2277 [3] W. R. Collins, W. Lewandowski, E. Schmois, J.J. Walish, T. M. Swager, Angew. Chem. Int. Ed. 50 (2011)< 
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