2024-03-28T21:38:49Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1700792020-05-27T09:27:33Zcom_10261_89com_10261_3col_10261_468
http://hdl.handle.net/10261/170079
349819
Two-dimensional organic (bio)layers on surfaces
2014
comunicación de congreso
López, María Francisca
rp07229
Méndez, Javier
Martín-Gago, José A.
rp13601
2014-09
Trabajo presentado en la 13th European Vacuum Conference, la 9th Iberian Vacuum Meeting, la 7th European Topical Conference on Hard Coatings y el Special symposium "Ultra thin oxide films and oxide coatings applications", celebrados en Aveiro (Portugal) del 8 al 12 de septiembre de 2014.
Surface-assisted cyclodehydrogenation and de
hydrogenative polymerisation of polycyclic
(hetero)aromatic hydrocarbons (PAH) are among
the most important strategies for bottom-up
assembly of new nanostructures from their mo
lecular building blocks. Although diverse
compounds have been formed in recent year
s using this methodology, a limited knowledge on
the molecular machinery operating at the nanoscale has prevented a rational control of the
reaction outcome. By controlling surface diffusion of N-heteroaromatic precursors, the on-
surface dehydrogenation can either lead
to monomolecular triazafullerenes and
diazahexabenzocoronenes (N-doped nanographe
ne), to N-doped oligomeric or polymeric
networks, or to carbonaceous monolayers. G
overning the on-surface dehydrogenation process
is a step forward towards the tailored fabrication of molecular 2D nanoarchitectures distinct to
graphene and exhibiting new
properties of fundamental a
nd technological interest.
We combined advanced in-situ surface techniques as STM and NEXAFS with theoretical ab-
initio calculations to achieve a complete unders
tanding of the self-assembling of molecular
precursors on surfaces. Herein, by merging info
rmation from these techniques and different
single-crystal metal substrates, we report on the diffusion control of competitive
intramolecular and intermolecular dehydrogenative processes respectively called
cyclodehydrogenation and dehydrogenative polym
erisation, which operate in the on-surface
synthesis of N-doped fullerene,
nanographene, polyaromatic netw
ork, membrane or graphene.
13th European Vacuum Conference