NDLI: Electronic properties of the boroxine–gold interface: evidence of ultra-fast charge delocalization

Content Provider	Royal Society of Chemistry (RSC)
Author	Feng, Zhijing Fronzoni, Giovanna Stredansky, Matus Cvetko, Dean Comelli, Giovanni Kladnik, Gregor Verdini, Alberto Dri, Carlo Toffoli, Daniele Furlan, Sara Morgante, Alberto Balducci, Gabriele Ustunel, Hande Stener, Mauro Cossaro, Albano
Copyright Year	2017
Abstract	We performed a combined experimental and theoretical study of the assembly of phenylboronic acid on the Au(111) surface, which is found to lead to the formation of triphenylboroxines by spontaneous condensation of trimers of molecules. The interface between the boroxine group and the gold surface has been characterized in terms of its electronic properties, revealing the existence of an ultra-fast charge delocalization channel in the proximity of the oxygen atoms of the heterocyclic group. More specifically, the DFT calculations show the presence of an unoccupied electronic state localized on both the oxygen atoms of the adsorbed triphenylboroxine and the gold atoms of the topmost layer. By means of resonant Auger electron spectroscopy, we demonstrate that this interface state represents an ultra-fast charge delocalization channel. Boroxine groups are among the most widely adopted building blocks in the synthesis of covalent organic frameworks on surfaces. Our findings indicate that such systems, typically employed as templates for the growth of organic films, can also act as active interlayers that provide an efficient electronic transport channel bridging the inorganic substrate and organic overlayer.
Starting Page	3789
Ending Page	3798
Page Count	10
File Format	HTM / HTML PDF
ISSN	20416520
Volume Number	8
Issue Number	5
Journal	Chemical Science
DOI	10.1039/c6sc05632f
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Subscribed
Subject Keyword	Acid Oxygen Covalent organic framework Electron spectroscopy Auger Overlayer Heterocyclic compound
Content Type	Text
Resource Type	Article
Subject	Chemistry

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