Method for bottom-up graphene sheet preparation and bandgap engineering

摘要

A combination of a substrate selected from silicon, silicon carbide or a metal and a grapheme precursor having the following properties: (a) an aromatic structure that forms the basis of the graphene structure, said aromatic structure being selected from the group consisting of: benzene, naphthalene, pyrene, anthracene, chrysene, coronene, and phenanthrene, or a cyclic or acyclic structures which can be converted to aromatic structures and (b) functional groups that can react with each other to form additional aromatic structures.

主权项

1. A method for preparing a graphene precursor which comprises:
condensing 1,4 dicyanobenzene with a 3 halo benzyl derivative to produce 1,4-bis(3-chlorophenylacetyl)benzene; oxidizing at least a portion of the 1,4-bis(3-chlorophenylacetyl)benzene to produce an oxidized 1,4-bis(3-chlorophenylacetyl)benzene wherein the methylene groups of the phenyl acetyl moieties were converted to carbonyl groups; reacting the oxidized 1,4-bis(3-chlorophenylacetyl)benzene with optionally substituted dibenzyl ketone to produce a reacted benzene compound; and reacting at least a portion of the reacted benzene compound with an alkyne to convert at least one residual halo groups to ethynyl groups.