Departamento de Química Orgánica, Universidad Autónoma de Madrid, Cantoblanco , Madrid 28049, Spain.
J Am Chem Soc. 2014 Mar 26;136(12):4593-8. doi: 10.1021/ja411830x. Epub 2014 Mar 14.
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.
我们在此描述了首例高度剥离的石墨烯通过共价键与电子接受型酞菁相连的实例。通过“点击”化学法，在纳米碳表面实现了烷基磺酰基酞菁的功能化。新型复合物通过热重分析、原子力显微镜、透射电子显微镜和拉曼光谱以及基态吸收进行了全面表征，并对基态和激发态下的电子给体-受体相互作用进行了研究。特别是，一系列稳态和时间分辨光谱实验证明了从石墨烯到电子接受型酞菁的光致电子转移。这是首例电子给体-受体纳米杂化物（即少层石墨烯/酞菁）的实例，突显了石墨烯罕见的电子给体特性。
