Organometallic chemistry of graphene: Photochemical complexation of graphene with group 6 transition metals
Organometallic chemistry of graphene: Photochemical complexation of graphene with group 6 transition metals
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DOI：
10.1016/j.carbon.2017.12.025
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发表时间：
2018-04
期刊：
影响因子：
10.9
通讯作者：
Mingguang Chen;Á. Pekker;Wangxiang Li;M. Itkis;R. Haddon;E. Bekyarova
中科院分区：
文献类型：
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作者：
Mingguang Chen;Á. Pekker;Wangxiang Li;M. Itkis;R. Haddon;E. Bekyarova
我们报道了利用光激活反应与有机金属化合物在单层石墨烯上制备6族过渡金属的η - 6配合物的实验。反应过程之后是石墨烯电导率的现场测量。我们观察到铬试剂对石墨烯电子性能的影响最大，导致（η - 6-石墨烯）CrL [L = C6H6, (CO)3]配合物的导电性增强。因此，在石墨烯与Cr(CO)6共价功能化的情况下，电导率增加了4倍，而（η6- C6H6）Cr(CO)3试剂的电导率增加了一倍，但增强效果最小。这种共价键模式保留了石墨烯结构的共轭性和平面性，为制备一类具有过渡金属功能化的新型石墨材料提供了一条有希望的途径，这类材料可能在光电子学、自旋电子学和磁性纳米器件中得到应用。
We report the experimental realization of η6-complexes of group 6 transition metals with a single layer graphene using photo-activated reactions with organometallic compounds. The reaction progress was followed by in-situ measurements of the graphene conductivity. We observed that the chromium reagents exert the strongest effect on the electronic properties of graphene, leading to (η6-graphene)CrL [L = C6H6, (CO)3] complexes with enhanced conductivity. Thus, in the case of covalent functionalization of graphene with Cr(CO)6, the conductivity increased by a factor of 4, while the (η6- C6H6)Cr(CO)3reagent doubled the conductivity producing the least enhancement. This mode of covalent bonding preserves the conjugation and the planarity of the graphene structure and offers a promising route for the preparation of a new class of graphitic materials functionalized with transition metals, which may find applications in optoelectronics, spintronics and magnetic nanodevices.