Structure Formation and Coupling Reactions of Hexaphenylbenzene and Its Brominated Analog
Abstract
The on‐surface coupling of the prototypical precursor molecule for graphene nanoribbon synthesis, 6,11‐dibromo‐1,2,3,4‐tetraphenyltriphenylene (C42Br2H26, TPTP), and its non‐brominated analog hexaphenylbenzene (C42H30, HPB), was investigated on coinage metal substrates as a function of thermal treatment. For HPB, which forms non‐covalent 2D monolayers at room temperature, a thermally induced transition of the monolayer's structure could be achieved by moderate annealing, which is likely driven by π‐bond formation. It is found that the dibrominated carbon positions of TPTP do not guide the coupling if the growth occurs on a substrate at temperatures that are sufficient to initiate C−H bond activation. Instead, similar one‐dimensional molecular structures are obtained for both types of precursors, HPB and TPTP.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jul 18, 2021
- Source ID
- 10.1002/cphc.202100049
Entities
People
- Alexander Sinitskii
- Axel Enders
- Christoph Dobner
- Jacob D Teeter
- Mamun Sarker
- Paulo S. Costa
Organizations
- National Science Foundation
- Office of Naval Research
- University of Bayreuth
- University of Nebraska–Lincoln