Graphene 106 Lewis base

Figure 3 is an attempt to synthesize and highlight the key molecular features of the edges and the basal planes of graphene layers. Only some of the most prevalent surface functional groups are depicted [37]. Special attention should be paid to the delocalized % electron system that acts as a Lewis base in aqueous. solution [71-73] ... 

C is a basal plane site characterized by the presence of delocalized n electrons, which thus acts as a Lewis base center. Such sites are probably located in n-electron-rich regions within the basal planes of carbon crystallites (graphenes), away from the edges [63]. Evidence favoring their electron donor-acceptor (EDA) interactions, such as Reaction (3.1), was presented [63] by investigating a polymer-derived microporous carbon and a furnace carbon black, using HCl adsorption isotherms,... 

When CNTs were added to the solution, a rapid drop in the electrode potential and an increase in pH were observed in the first stage (stage 1). CNTs can be envisaged as roll-up graphene layer sheet, regarding their molecular structure. The basic sites, which consist of delocalized n electrons, on the surface of the CNTs are responsible for the rise in pH in the first stage, as they can act as Lewis bases capable of complexing protons to its jt structure. ... 

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