Chapitre D'ouvrage Année : 2025

Molecular recognition, magnetic, and photophysical properties of 3d-4f metallacrowns

Résumé

The metallamacrocycles known as metallacrowns (MCs) are inorganic analogues of the well-known crown ethers, where the repeating [C–C–O] units are replaced by [M–N–O]. Similar to crown ethers, the oxygen atoms of the MC core are capable of coordinating metals within the central cavity formed by the MC ring. By varying the ring ligands and metal ions used in their construction, a large variety of MC structures with tunable and attractive properties can be synthesized. In this review chapter, we focus on mixed 3d-4f heterometallic MCs, where a trivalent lanthanide ion (LnIII) is encapsulated within the MC cavity, and that have been reported since 2019. We begin by introducing the different types of MC structures and determining how the choice of ring ligand and metal influences the resulting framework. Additionally, the MC structure affects the molecular recognition abilities of the chiral 15-MC-5 scaffold. We then explore the magnetic properties of metallacrowns, with an emphasis on their capability to act as single-molecule magnets (SMMs) and magnetocoolants. Furthermore, practical applications based on the LnIII-centered photoluminescence in 3d-4f MCs, such as near-infrared (NIR) biological imaging, nanothermometry, white-light generation, and more recent applications, are also presented.

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Dates et versions

hal-05361402 , version 1 (12-11-2025)

Identifiants

Citer

Soroush Naseri, Timothée Lathion, Svetlana V. Eliseeva, Stéphane Petoud, Curtis Zaleski, et al.. Molecular recognition, magnetic, and photophysical properties of 3d-4f metallacrowns. Jean-Claude G. Bünzli; Susan M. Kauzlarich. Handbook on the Physics and Chemistry of Rare Earths, 68 (351), Elsevier, pp.1-99, In press, Handbook on the Physics and Chemistry of Rare Earths, 0168-1273. ⟨10.1016/bs.hpcre.2025.09.001⟩. ⟨hal-05361402⟩
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