Electron-donating behavior of few-layer graphene in covalent ensembles with electron-accepting phthalocyanines.
Electron-donating behavior of few-layer graphene in covalent ensembles with electron-accepting phthalocyanines.
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DOI：
10.1021/ja411830x
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发表时间：
2014-03
影响因子：
15
通讯作者：
M. Ragoussi;Georgios Katsukis;A. Roth;J. Malig;G. de la Torre;D. Guldi;T. Torres
中科院分区：
文献类型：
--
作者：
M. Ragoussi;Georgios Katsukis;A. Roth;J. Malig;G. de la Torre;D. Guldi;T. Torres
在这里，我们描述了高度剥离的石墨烯共价连接到接受电子的酞菁的第一个例子。通过“点击”化学方法，实现了烷基磺酰基酞菁在纳米碳表面的功能化。对新的系综进行了全面的表征(热重分析、原子力显微镜、电子显微镜和拉曼光谱以及基态吸收)，并从基态和激发态的电子给体-受体相互作用的角度进行了研究。特别是，一系列的稳态和时间分辨光谱实验证明了光致电子从石墨烯到接受电子的酞菁的转移。这是第一个电子供体-受体纳米共轭的例子，也就是几层石墨烯/酞菁，准确地指出了石墨烯不同寻常的给电子特性。
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 "click" 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-acceptor 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-acceptor nanoconjugate, that is, few-layer graphene/phthalocyanine, pinpointing the uncommon electron donating character of graphene.