Two-dimensional self-assembly of benzotriazole on an inert substrate
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The ultra-high vacuum (UHV) room temperature adsorption of benzotriazole (BTAH), a well-known corrosion inhibitor for copper, has been investigated on the pristine Au(111) surface using a combination of surface sensitive techniques. The dimensionality of the molecule is reduced from the 3D crystal structure to a 2-dimensional surface confinement, which induces the formation of hydrogen bonded, 1-dimensional molecular chains consisting of alternating pro-S and pro-R enantiomers mainly. The 0-dimensional system is characteristic of gas-phase BTAH, which undergoes a tautomeric equilibrium, with consequences for the resulting adsorbed species. The balance between hydrogen bonding, inter-chain van der Waals interactions and surface-molecule interactions, and the correlation with the dimensionality of the system, are discussed in the light of the experimental results and a computational description of the observed features.
Grillo , F , Garrido Torres , J A , Treanor , M J , Larrea , C R , Goetze , J P , Lacovig , P , Fruchtl , H A , Schaub , R & Richardson , N V 2016 , ' Two-dimensional self-assembly of benzotriazole on an inert substrate ' Nanoscale , vol 8 , no. 17 , pp. 9167-9177 . DOI: 10.1039/C6NR00821F
Copyright 2016 the Authors. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence (http://creativecommons.org/licenses/by/3.0/).
FG has received funding from the European Community’s Seventh Framework Programme (FP7/2007-2013) under grant agreement nº 312284 for part of the research leading to these results (NEXAFS, XPS). The Engineering and Physical Sciences Research Council (EPSRC) is acknowledged for the funding of PhD studentships (JAGT and MJT – EP/J500549/1 and CRL – EP/M506631/1). JPG acknowledges funding from the EPSRC (EP/J018139/1).