Self-assembly of 1,3,5-benzenetribenzoic acid on Ag and Cu at the liquid/solid interface
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Assembly of 1,3,5-benzenetribenzoic acid (H3BTB) from solution on Au substrates modified by underpotential deposited Ag and Cu layers was studied by near edge X-ray absorption fine structure spectroscopy, X-ray photoelectron spectroscopy and scanning tunneling microscopy. Adsorption of H3BTB on Cu resulted in disordered layers with sporadic occurrence of ordered molecular aggregates. In contrast, highly ordered layers were obtained on Ag which exhibit a pronounced row structure and involve a monopodal bidentate adsorption geometry of the molecules through carboxylate coordinating bonding. The row structure arises from π-stacking of the molecules and is accompanied by hydrogen bonding interactions between the COOH groups of adjacent rows. As a consequence of the geometry of the H3BTB molecule and the dominance of intermolecular over molecule-substrate interactions, the SAM forms an open structure featuring a grooved surface and nanotunnels.
Aitchison , H , Lu , H , Ortiz de la Morena , R , Cebula , I , Zharnikov , M & Buck , M 2018 , ' Self-assembly of 1,3,5-benzenetribenzoic acid on Ag and Cu at the liquid/solid interface ' , Physical Chemistry Chemical Physics , vol. 20 , no. 4 , pp. 2731-2740 . https://doi.org/10.1039/C7CP06160A
Physical Chemistry Chemical Physics
© 2018 the Authors. This work has been made available online in accordance with the publisher’s policies. This is the author created accepted version manuscript following peer review and as such may differ slightly from the final published version. The final published version of this work is available at https://doi.org/ 10.1039/C7CP06160A
DescriptionSupport by the Leverhulme Trust (RGP-2013-177) and EPSRC via a doctoral training grant (H.A.) is gratefully acknowledged.
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