Bottom-up assembly of multicomponent coordination-based oligomers

• Verfasst von: Mondal, Prakash Chandra [VerfasserIn]
• Verfasst von: Jeyachandran, Yekkoni Lakshmanan [VerfasserIn]
• Verfasst von: Hamoudi, Hicham [VerfasserIn]
• Verfasst von: Zharnikov, Michael [VerfasserIn]
• Verfasst von: Gupta, Tarkeshwar [VerfasserIn]
• Titel: Bottom-up assembly of multicomponent coordination-based oligomers
• Verf.angabe: Prakash Chandra Mondal, Jeyachandran Yekkoni Lakshmanan, Hicham Hamoudi, Michael Zharnikov, and Tarkeshwar Gupta
• E-Jahr: 2011
• Jahr: 28 July 2011
• Umfang: 7 S.
• Fussnoten: Gesehen am 07.09.2022
• Titel Quelle: Enthalten in: The journal of physical chemistry <Washington, DC> / C
• Ort Quelle: Washington, DC : Soc., 2007
• Jahr Quelle: 2011
• Band/Heft Quelle: 115(2011), 33, Seite 16398-16404
• ISSN Quelle: 1932-7455
• DOI: doi:10.1021/jp201339p
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1815968516

Abstract

Transition metal complexes allow a high degree of molecular design flexibility through symmetry considerations and ligand architecture, which can be explored for the fabrication of ordered multilayer assemblies through bottom-up approach. Here we describe the preparation of such assemblies, viz. multicomponent coordination-based oligomer films on siloxane-based templates by wet-chemical layer-by-layer deposition process. In these films we combined optically rich iron and ruthenium polypyridyl complexes having pendant pyridine groups (so-called metallo-ligands) and a coinage metal (copper or silver) that acted as a linker between the polypyridyl complex moieties. The properties and structural parameters of the primary template and the oligomer films were studied by X-ray photoelectron spectroscopy, near-edge X-ray absorption fine structure spectroscopy, UV-vis spectroscopy, spectroscopic ellipsometry, atomic force microscopy, and contact angle goniometry. A linear increase in the film thickness upon addition of every next layer suggests that the long-range order of the system is determined by the octahedral structure of the metallo-ligand and square-pyramidal/tetrahedral geometry of the coinage metal linker. Spectroscopic data indicate the existence of electronic communication throughout the individual metallo-organic chains.