Tailored Formation of N-Doped Nanoarchitectures by Diffusion-Controlled on-Surface (Cyclo)Dehydrogenation of Heteroaromatics
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- 作者：Anna Lisa Pinardi ; Gonzalo Otero-Irurueta ; Irene Palacio ; Jose Ignacio Martinez ; Carlos Sanchez-Sanchez ; Marta Tello ; Celia Rogero ; Albano Cossaro ; Alexei Preobrajenski ; Berta G贸mez-Lor ; Andrej Jancarik ; Irena G. Star谩 ; Ivo Star媒 ; M. Francisca Lopez ; Javier M茅ndez ; Jose Angel Martin-Gago
- 刊名：ACS Nano
- 出版年：2013
- 出版时间：April 23, 2013
- 年：2013
- 卷：7
- 期：4
- 页码：3676-3684
- 全文大小：558K
- 年卷期：v.7,no.4(April 23, 2013)
- ISSN：1936-086X
文摘
Surface-assisted cyclodehydrogenation and dehydrogenative polymerization of polycyclic (hetero)aromatic hydrocarbons (PAH) are among the most important strategies for bottom-up assembly of new nanostructures from their molecular building blocks. Although diverse compounds have been formed in recent years using this methodology, a limited knowledge on the molecular machinery operating at the nanoscale has prevented a rational control of the reaction outcome. We show that the strength of the PAH鈥搒ubstrate interaction rules the competitive reaction pathways (cyclodehydrogenation versus dehydrogenative polymerization). By controlling the diffusion of N-heteroaromatic precursors, the on-surface dehydrogenation can lead to monomolecular triazafullerenes and diazahexabenzocoronenes (N-doped nanographene), to N-doped oligomeric or polymeric networks, or to carbonaceous monolayers. Governing the on-surface dehydrogenation process is a step forward toward the tailored fabrication of molecular 2D nanoarchitectures distinct from graphene and exhibiting new properties of fundamental and technological interest.