Controlled covalent binding of antiferromagnetic tetramanganese complexes to carbon nanotubes

Abstract

Tetramanganese complexes are covalently attached to carbon nanotubes such, that the magnetic properties of the antiferromagnetic molecules are preserved.

Quantum transport in carbon nanotubes covalently functionalized with magnetic molecules

“…Approximately one {Mn 4 } complex is attached every 10 nm on the CNTs. This was confirmed using energy‐filtered transmission electron microscopy .…”

“…Subsequently, the sample was immersed in a solution of the {Mn 4 } complexes (10 mM in acetonitrile) in order to functionalize the CNTs via ligand exchange. This results in a covalent bond between the CNT and a complex that is as short and as rigid as possible .…”

Independent and coherent transitions between antiferromagnetic states of few-molecule systems

“…Two of the four ions reside in an approximately octahedral ligand field and two in an approximately trigonal bipyramidal ligand field with a spin S = 5 2 (S = 3 2 ) for Mn II (Co II ). The ground state is AFM, as supported by magnetization measurements for the pristine molecules as well as for molecules grafted to CNTs [29][30][31]. Density functional theory (DFT) calculations of the isolated complexes [30] also yield an S z tot = 0 ground state, confirming the overall AFM nature of the intramolecular magnetic interactions in the simpler one-electron approximation.…”

Magnetic properties of coordination clusters with {Mn4} and {Co4} antiferromagnetic cores

“…robustness against perturbation due to magnetic fields, absence of stray fields, and capability to generate ultrafast dynamics and large magnetotransport effects. 15 Antiferromagnetic molecules can be used to functionalize other organic systems, as carbon nanotubes, with the advantage that the current flowing through the tube does not alter the magnetic properties of the molecules 16,17 and the low spin-orbit coupling allows long spin-flip lengths and spin lifetimes.…”