Tulli, Ludovico

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Tulli
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Ludovico
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Tulli, Ludovico

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2017 - 201912020 - 20211
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Autor:in: Moradi, Mina ×

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    Publikation
    Coordination-driven monolayer-to-bilayer transition in two-dimensional metal–organic networks
    (American Chemical Society, 16.03.2021) Moradi, Mina; Lengweiler, Nadia; Housecroft, Catherine; Tulli, Ludovico; Stahlberg, Henning; Jung, Thomas; Shahgaldian, Patrick [in: The Journal of Physical Chemistry Part B]
    We report on monolayer-to-bilayer transitions in 2D metal–organic networks (MONs) from amphiphiles supported at the water–air interface. Functionalized calix[4]arenes are assembled through the coordination of selected transition metal ions to yield monomolecular 2D crystalline layers. In the presence of Ni(II) ions, interfacial self-assembly and coordination yields stable monolayers. Cu(II) promotes 2D coordination of a monolayer which is then diffusively reorganizing, nucleates, and grows a progressive amount of second layer islands. Atomic force microscopic data of these layers after transfer onto solid substrates reveal crystalline packing geometries with submolecular resolution as they are varying in function of the building blocks and the kinetics of the assembly. We assign this monolayer-to-bilayer transition to a diffusive reorganization of the initial monolayers owing to chemical vacancies of the predominant coordination motif formed by Cu2+ ions. Our results introduce a new dimension into the controlled monolayer-to-multilayer architecturing of 2D metal–organic networks.
    01A - Beitrag in wissenschaftlicher Zeitschrift
  • Vorschaubild nicht verfügbar
    Publikation
    Two-dimensional calix[4]arene-based metal-organic coordination networks of tunable crystallinity
    (Wiley, 13.11.2017) Moradi, Mina; Tulli, Ludovico; Nowakowski, Jan; Jung, Thomas A; Shahgaldian, Patrick; Baljozovic, Milos [in: Angewandte Chemie: International Edition]
    A flexible and versatile method to fabricate two-dimensional metal–organic coordination networks (MOCNs) by bottom-up self-assembly is described. 2D crystalline layers were formed at the air–water interface, coordinated by ions from the liquid phase, and transferred onto a solid substrate with their crystallinity preserved. By using an inherently three-dimensional amphiphile, namely 25,26,27,28-tetrapropoxycalix[4]arene-5,11,17,23-tetracarboxylic acid, and a copper metal node, large and monocrystalline dendritic MOCN domains were formed. The method described allows for the fabrication of monolayers of tunable crystallinity on liquid and solid substrates. It can be applied to a large range of differently functionalized organic building blocks, also beyond macrocycles, which can be interconnected by diverse metal nodes.
    01A - Beitrag in wissenschaftlicher Zeitschrift