Decorating graphene nanosheets with electron accepting pyridyl-phthalocyanines.
Decorating graphene nanosheets with electron accepting pyridyl-phthalocyanines.
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DOI：
10.1039/c4nr05719h
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发表时间：
2015-03
期刊：
影响因子：
6.7
通讯作者：
L. Wibmer;Leandro M. O. Lourenço;A. Roth;Georgios Katsukis;M. Neves;J. Cavaleiro;J. Tomé;T. Torres;D. Guldi
中科院分区：
文献类型：
--
作者：
L. Wibmer;Leandro M. O. Lourenço;A. Roth;Georgios Katsukis;M. Neves;J. Cavaleiro;J. Tomé;T. Torres;D. Guldi
本文介绍了新型剥离型石墨烯-酞菁纳米杂化材料的制备及其光物理性质的研究。在二甲基甲酰胺(DMF)中，吡啶基酞菁(PC)被认为是一种新型的、强度可变的电子接受元件，通过将其固定在石墨烯的基面上，具有很大的剥离石墨的潜力，从而得到单层和涡轮层状的石墨烯。用原子力显微镜、透射电子显微镜、拉曼光谱、稳态和泵浦探测的暂态吸收光谱对其进行了表征，并从基态和激发态的电子给体-受体相互作用的角度对其进行了研究。在此背景下，在一系列稳态和时间分辨光谱实验中，证实了光激发时电子从石墨烯到接受电子的动态转移，例如在1OF和330±50ps中分别用于电荷分离和电荷复合。
We describe herein the preparation of novel exfoliated graphene-phthalocyanine nanohybrids, and the investigation of their photophysical properties. Pyridyl-phthalocyanines (Pcs) are presented as novel electron accepting building blocks of variable strengths with great potential for the exfoliation of graphite via their immobilization onto the basal plane of graphene in dimethylformamide (DMF) affording single layered and turbostratic graphene based . were fully characterized (AFM, TEM, Raman, steady-state and pump probe transient absorption spectroscopy) and were studied in terms of electron donor-acceptor interactions in the ground and excited states. In this context, electron transfer upon photoexcitation from graphene to the electron accepting Pcs with dynamics, for example, in of <1 and 330 ± 50 ps for charge separation and charge recombination, respectively, was corroborated in a series of steady-state and time-resolved spectroscopy experiments.