Periodic Reporting for period 1 - MAGMOLMET (Magnetic multifunctional molecules based on 4f and 3d/4f metal complexes)
Reporting period: 2019-09-01 to 2021-08-31
Two main goals for the project were set:
- development of new original synthetic protocols which would allow the obtaining of metal combinations in a way that allows to influence and control their structure;
- finding for unusual magnetic, spectroscopic and optical behaviours by using physical methods that include magnetic susceptibility measurements (d.c. and a.c.) heat capacity measurements, luminescence spectroscopy.
By completing this project, it was proved that by chosing suitable synthetic protocols, salicylaldehyde and its derivatives were able to generate a rich variety of 3d and 3d/4f complexes, both with nuclearity ranging from dinuclear up to tetradecanuclear metallic cores, and one-dimensional coordination networks. The objectives to expand the library of compounds with single-molecule magnet (SMM) behaviour and to better understand the factors that govern magnetic properties were reached. The achieved results are being prepared for publication and the established chemistry of polynuclear complexes will reveal new features and strategies improving their performances as magnetic/luminescent materials and the consequent development of multifunctional molecules.
The project pursued a joint experimental and theoretical research, which, together, aimed at understanding how cooperative effects determine these properties and how the properties can be controlled by appropriate variation of the coupling between metal centers.
Another part of the work consisted in assembling of 1D cyanido-bridged 3d-4f coordination polymers by following the building-block approach and using a pentadentate bis-semicarbazone ligand. Part of the results has been published via open access to a peer-reviewed scientific journal. A manuscript describing hepta-coordinated Co(II) assemblies is also about to be submitted.