Metal-organic supramolecular systems have been extensively studied for their numerous fields of application, from catalysis to sensors, to luminescent and magnetic materials.Our work focuses on metallacrowns (MCs), a family of metallomacrocycles analog of crown ethers, that exhibit widely variable topologies and high stability in solution, and that can be used as supramolecular synthons. Few examples in literature report the use of MCs as building blocks for supramolecular networks in the solid state.1,2The aim of our work is to control MCs assembly through optimization of the supramolecular interactions occurring between MC scaffolds. A few hydroxamic acids ligands have been designed to allow MCs to interact with specific simple connecting units. Great attention has been directed to finding connecting units that could limit the formation of undesired interactions and thus of alternative crystalline packing.In order to enhance the control over tridimensional arrangement of the metallacycles over structural variability, the main challenge lies in optimizing both axial and equatorial interactions with respect of the MC scaffold, since both interactions would be fundamental for ultimately exploiting MC as MOF building blocks.1 C. McDonald et al., CrystEngComm. (2013) 15, 66722 A. V. Pavlishchuk et al., Eur. J. Inorg. Chem. (2011) 4826.

Towards control of metallacrown assembly through selected supramolecular interactions

248th National Meeting (2014)

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