Electron-Donating Behavior of Few-Layer Graphene in Covalent Ensembles with Electron-Accepting Phthalocyanines

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• 作者：Maria-Eleni Ragoussi ; Georgios Katsukis ; Alexandra Roth ; Jenny Malig ; Gema de la Torre ; Dirk M. Guldi ; Tom谩s Torres
• 刊名：Journal of the American Chemical Society
• 出版年：2014
• 出版时间：March 26, 2014
• 年：2014
• 卷：136
• 期：12
• 页码：4593-4598
• 全文大小：398K
• 年卷期：v.136,no.12(March 26, 2014)
• ISSN：1520-5126

文摘

We describe herein the first example of highly exfoliated graphene covalently linked to electron accepting phthalocyanines. The functionalization of the nanocarbon surface with alkylsulfonyl phthalocyanines was attained by means of a 鈥渃lick鈥?chemistry protocol. The new ensemble was fully characterized (thermogravimetric analysis, atomic force microscopy, transmission electron microscopy and Raman, as well as ground-state absorption) and was studied in terms of electron donor鈥揳cceptor interactions in the ground and in the excited state. In particular, a series of steady-state and time-resolved spectroscopy experiments demonstrated photoinduced electron transfer from the graphene to the electron-accepting phthalocyanines. This is the first example of an electron donor鈥揳cceptor nanoconjugate, that is, few-layer graphene/phthalocyanine, pinpointing the uncommon electron donating character of graphene.