Chemistry Reference
In-Depth Information
Scheme 19 Synthesis of polymeric graphite ribbon [
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5 Conclusion and Outlook
So far, three types of 2D nanographenes with different edge structures have been
described. The physical properties of these systems, such as optical properties,
electronic properties, solid state packing motif, and stability are largely dependent
on the types of edge structures (zigzag or armchair) and are tunable upon appropri-
ate chemical modification (e.g., introduction of proper substituents). From the
course of development of these 2D aromatic systems, one clue is quite clear: the
rational design of synthesis and the isolation of the stable form in solution and
crystalline phase are the preconditions for establishing a proper structural-property
relationship, and an understanding of the latter is the basis of eventual applications.
For open-shell systems with all zigzag peripheries, the synthetic method and
stabilization are long-standing issues but recently a large breakthrough is achieved.
Due to the inherent instability, seeking of efficient synthetic approaches and
stabilization forces are still the mainstream in this area. Nevertheless, it is exciting
