Molecular graphene

Hexa-/7cn-hexabenzocoronene (HBC), which comprises 13 fused benzene rings, can be regarded as one of the smallest members of molecular graphenes, and has been utilized for supramolecular chemistry aiming at organic electronics. The first synthesis of this important structural motif dates back to the work of Clar and Ironside, where 2 3-7 8-dibenzo-pm-naphthene was allowed to react with Br2 in benzene, and an insoluble fraction, isolated by filtration of the reaction mixture, was heated in a stepwise manner (Scholl reaction. Scheme 1). However, as expected, this solid-state synthesis suffered from low yield and difficulty in purification. Although continuous efforts... 

As described above, a variety of molecular graphenes have become available. Since graphene is a constituent of graphite, one may envisage if tailored soft organic graphite can be designed by controlled assembly of... 

Figure 3 Structures of molecular graphenes 14-16 designed for nanofiber assembly.

Figure 4 Library of molecular graphenes 17-35 (miscellaneous) including HBC oligomers.

This chapter highlights one-dimensionally assembled molecular graphenes as a new family of organic materials. The significance of such jr-electronic organic materials lies in their graphite-Uke structural motif, which can be... 

Figure 1.1 Molecular graphenes by fusion of benzene rings in different modes.

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