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Visible-Light Assisted Covalent Surface Functionalization of Reduced Graphene Oxide Nanosheets with Arylazo Sulfones |
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| Authors: | Lorenzo Lombardi Alessandro Kovtun Sebastiano Mantovani Dr. Giulio Bertuzzi Laura Favaretto Cristian Bettini Dr. Vincenzo Palermo Dr. Manuela Melucci Prof. Marco Bandini |
| Affiliation: | 1. Dipartimento di Chimica “Giacomo Ciamician”, Alma Mater Studiorum – Università di Bologna, Via Selmi 2, 40126 Bologna, Italy Center for Chemical Catalysis – C3, Via Selmi 2, 40126 Bologna, Italy These authors contributed equally to the work.;2. Istituto per la Sintesi e la Fotoreattività (ISOF) – CNR, Via Gobetti, 101, 40129 Bologna, Italy These authors contributed equally to the work.;3. Istituto per la Sintesi e la Fotoreattività (ISOF) – CNR, Via Gobetti, 101, 40129 Bologna, Italy;4. Dipartimento di Chimica “Giacomo Ciamician”, Alma Mater Studiorum – Università di Bologna, Via Selmi 2, 40126 Bologna, Italy Center for Chemical Catalysis – C3, Via Selmi 2, 40126 Bologna, Italy;5. Center for Chemical Catalysis – C3, Via Selmi 2, 40126 Bologna, Italy;6. Dipartimento di Chimica “Giacomo Ciamician”, Alma Mater Studiorum – Università di Bologna, Via Selmi 2, 40126 Bologna, Italy |
| Abstract: | We present an environmentally benign methodology for the covalent functionalization (arylation) of reduced graphene oxide (rGO) nanosheets with arylazo sulfones. A variety of tagged aryl units were conveniently accommodated at the rGO surface via visible-light irradiation of suspensions of carbon nanostructured materials in aqueous media. Mild reaction conditions, absence of photosensitizers, functional group tolerance and high atomic fractions (XPS analysis) represent some of the salient features characterizing the present methodology. Control experiments for the mechanistic elucidation (Raman analysis) and chemical nanomanipulation of the tagged rGO surfaces are also reported. |
| Keywords: | aryl azasulfones photochemistry reduced graphene oxide surface modification Suzuki cross-coupling |