To produce the molecular magnet, the scientists integrated the new tetrazine ligand with rare earth metals– the elements dysprosium and gadolinium– and added a strong decreasing representative to the service to form the radical tetrazine bridges. The brand-new magnet taken shape in the type of dark red prism-shaped flakes.
The scientists explain the molecular system within this crystal as a tetranuclear complex in which four ligand-stabilized metal ions are bridged together by four tetrazine radicals. The most substantial residential or commercial property of this brand-new particle is its remarkable magnetic firmness or coercive field. This means that the complexes formed a durable single-molecule magnet that was especially resistant to demagnetization.
The team describe that this high coercive field is attained by strong coupling through the radical tetrazine system. The 4 metal centers of the particle are coupled together to give one molecular system with a huge spin. Just the predecessor to this particle, with the dinitrogen bridge, provided more powerful coupling. Nevertheless, as currently mentioned, it was likewise much less versatile and less steady than the brand-new tetrazine extreme bridge.
The team emphasize that this technique might be utilized to produce other multinuclear complexes with giant spin, providing outstanding chances for developing incredibly efficient single-molecule magnets without the troubles of previous candidates.
Reference: “Radical-Bridged Ln4 Metallocene Complexes with Strong Magnetic Coupling and a Large Coercive Field” by Niki Mavragani, Dylan Errulat, Dr. Diogo A. Gálico, Dr. Alexandros A. Kitos, Dr. Akseli Mansikkamäki and Prof. Dr. Muralee Murugesu, 24 August 2021, Angewandte Chemie.DOI: 10.1002/ anie.202110813.
Dr. Muralee Murugesu is a Full Professor and University Research Chair in Nanotechnology at the Department of Chemistry and Biomolecular Sciences of the University of Ottawa in Ontario, Canada. His research concentrates on the design and advancement of high-performing single-molecule magnets, metal– organic frameworks, and high-energy materials.
The ingredients in this unique recipe are unusual earth metals and an unusual nitrogen-based molecular bridge, as shown in the study released in the journal Angewandte Chemie.
A radical dinitrogen bridge– two nitrogen atoms with an extra electron, making the dinitrogen a radical– offered exceptional results for unusual earth metal ions, however is very difficult to control and offers “no space for modification,” explain Muralee Murugesu and his team from the University of Ottawa, Canada, in their research study. The researchers explain the molecular system within this crystal as a tetranuclear complex in which four ligand-stabilized metal ions are bridged together by 4 tetrazine radicals. As already pointed out, it was also much less versatile and less steady than the new tetrazine extreme bridge.
Credit: Angewandte Chemie
Magnets formed from a single particle are of particular interest in data storage, given that the ability to keep a bit on every particle could vastly increase the storage capability of computers. Researchers have actually now established a brand-new molecular system with a specific magnetic hardness. The active ingredients in this special recipe are unusual earth metals and an unusual nitrogen-based molecular bridge, as displayed in the research study published in the journal Angewandte Chemie.
The suitability of a molecule to end up being a magnetic information storage medium depends on the capability of its electrons to become allured and to resist demagnetization, likewise referred to as magnetic solidity. Chemists and physicists build molecular magnets like this from metal ions that are magnetically combined to one another by means of molecular bridges.
Nevertheless, these coupling bridges need to meet certain criteria, such as ease of production and versatility. A radical dinitrogen bridge– two nitrogen atoms with an additional electron, making the dinitrogen a radical– gave impressive results for unusual earth metal ions, however is very difficult to manage and uses “no room for modification,” explain Muralee Murugesu and his team from the University of Ottawa, Canada, in their research study. To provide higher scope, the group enlarged this bridge using a “double dinitrogen;” the untouched tetrazine ligand has four nitrogen atoms instead of two.