“Click” access to multilayer functionalized Au surface: A terpyridine patterning example

This work is focused on self-assembled monolayers (SAMs) fabrication, using two types of Au surfaces, by subsequent attachment of different layers in order to develop a stable platform consisting of covalent multilayer functionalized gold surfaces. The key step in the construction of SAMs is the covalent linkage to the gold surface, via an amino-thiol derivative, of a cyclooctyne unit exhibiting strained triple bonds which react fast (catalysts are not needed) and quantitatively with organic azides and enable the introduction of various chemical functionalized entities on the gold surface. The versatility of the system is demonstrated by the reaction of the cyclooctyne decorated gold surface with an azide functionalized terpyridine followed by step by step complexation with Fe(II) and another terpyridine unit resulting into a multilayer covered gold surface. The Au surfaces were characterized by XPS to determine the chemical composition of the resulting SAMs. SPR was applied for real-time monitoring of the molecular interactions that occurred on the Au surface for each deposited layer. DPN was used to direct pattern the terpyridine-ink on a pre-functionalized AuIDE electrode. The AFM topology resulted from DPN and PEIS demonstrated metal-coordinating ligand of Fe(II)-Terpy.

Publication year: 2017
Authors: F.A. Martin a, D. Marconi a, S. Neamtu a, T. Radu a, M. Florescu b, R. Turcu a, C. Lar c, N.D. Hădade c, I. Grosu c, I. Turcu a

a – National Institute for Research and Development of Isotopic and Molecular Technologies, P.O. Box 700, Cluj-Napoca 400293, Romania
b – Transilvania University of Brasov 1 Colina Universitatii, 500068 Brasov, Romania
c – Supramolecular Organic and Organometallic Chemistry Centre, Department of Chemistry, Faculty of Chemistry and Chemical Engineering, Babes-Bolyai University, 11 Arany Janos,400028 Cluj-Napoca, Romania

Published in: Materials Science and Engineering: C, 2017, Vol. 75, p. 1343–1350
DOI: 10.1016/j.msec.2017.03.033


bound mass Fe(II) multilayers self-assembly monolayer (SAM)


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