118871 20240319081027.0 doi 10.1016/j.mtchem.2022.101067 sideral 130271 ART-2022-130271 eng Escorihuela, E. Universidad de Zaragoza (orcid)0000-0001-6189-1642 Building large-scale unimolecular scaffolding for electronic devices 2022 Access copy available to the general public Unrestricted The fabrication of a future generation of (opto)electronic devices based on molecular components and materials will require careful chemical design, coupled with assembly methods that permit precise spatial orientation and arrangement of the functional molecules within device structures. Although unimolecular electronics are already a laboratory reality, the variation in the arrangement of the molecule within a molecular junction from measurement to measurement is considerable. Consequently, controlling the precise geometry at the molecule–metal contacts is a long-standing and largely unresolved challenge. Here, a strategy to fabricate uniform unimolecular junctions distributed in a regular pattern is reported. A monolayer of zinc metalloporphyrins, peripherally functionalised by bulky dendrons, is used to provide a well-defined array of molecular binding sites with precise spatial distribution. The dendrons are then photochemically cross-linked to form a robust base-layer. Parallel, uniformly-spaced unimolecular structures are subsequently assembled on these binding sites through a layer-by-layer (LbL) strategy. This LbL strategy proceeds through coordination of an α,ω-amino functionalised oligo(phenylene)ethynylene (OPE) molecule to the zinc ions of the metalloporphyrin template base-layer. The structure is then extended through alternating self-assembled layers of (cross-linked) zinc porphyrin and OPE. The coordination interaction between the zinc(II) sites and the bifunctional OPE wire ensures a high degree of registry between the layers and good electrical contact through the extended arrays and offer fine control over the chemical composition. info:eu-repo/grantAgreement/ES/DGA/E31-20R info:eu-repo/grantAgreement/ES/DGA/E47-20R info:eu-repo/grantAgreement/ES/MICINN-FEDER/PGC2018-097583-B-I00 info:eu-repo/grantAgreement/ES/MICINN/PID2019-105881RB-I00 info:eu-repo/grantAgreement/ES/UZ-IBERCAJA-CAI/CB7-21 info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 7.3 2022 CHEMISTRY, MULTIDISCIPLINARY 40 / 178 = 0.225 2022 Q1 T1 MATERIALS SCIENCE, MULTIDISCIPLINARY 76 / 343 = 0.222 2022 Q1 T1 1.229 2022 Biomaterials 2022 Q1 Catalysis 2022 Q1 Polymers and Plastics 2022 Q1 Electronic, Optical and Magnetic Materials 2022 Q1 Materials Chemistry 2022 Q1 Colloid and Surface Chemistry 2022 Q1 7.6 2022 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Concellón, A. Universidad de Zaragoza (orcid)0000-0002-8932-9085 Marín, I. Universidad de Zaragoza Kumar, V.J. Herrer, L. (orcid)0000-0002-3576-5156 Moggach, S.A. Vezzoli, A. Nichols, R.J. Low, P.J. Cea, P. Universidad de Zaragoza (orcid)0000-0002-4729-9578 Serrano, J.L. Universidad de Zaragoza (orcid)0000-0001-9866-6633 Martín, S. Universidad de Zaragoza (orcid)0000-0001-9193-3874 2013 765 Universidad de Zaragoza Dpto. Química Orgánica Área Química Orgánica 2012 755 Universidad de Zaragoza Dpto. Química Física Área Química Física 26 (2022), 101067 [8 pp.] Materials Today Chemistry 2468-5194 1711495 http://zaguan.unizar.es/record/118871/files/texto_completo.pdf Versión publicada 2723265 http://zaguan.unizar.es/record/118871/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:118871 articulos driver 2024-03-18-16:49:54 ARTICLE