Magnetic exchange, anisotropy and excitonic fluctuations in a [NiII7] Anderson wheel

Emily H. Payne, Lucinda R.B. Wilson, Mukesh K. Singh, Gary S. Nichol, J. R. Stewart, V. Garcia-Sakai, R. A. Ewings, Harry Lane, Jürgen Schnack*, Chris Stock*, Euan K. Brechin*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

The solvothermal reaction of Ni(ClO4)2·6H2O with hmpH and picH in a basic MeOH solution affords [Ni7(hmp)7.55(pic)4.45](ClO4)2·6MeOH (1·6MeOH) directly upon cooling the mother liquor. The metallic skeleton of 1 describes a [NiII7] centred hexagon, commonly referred to as an Anderson wheel. Magnetic measurements reveal ferromagnetic exchange between the central Ni ion and the ring Ni ions, and antiferromagnetic exchange between neighbouring ring Ni ions. They also confirm the presence of easy-plane anisotropy for the central Ni ion, and easy-axis anisotropy for the ring Ni ions, in agreement with DFT calculations and neutron scattering. For the analysis of the latter we apply an excitonic formalism using a Green's function response theory.

Original languageEnglish
JournalInorganic Chemistry Frontiers
Early online date23 Nov 2023
Publication statusE-pub ahead of print - 23 Nov 2023


Dive into the research topics of 'Magnetic exchange, anisotropy and excitonic fluctuations in a [NiII7] Anderson wheel'. Together they form a unique fingerprint.

Cite this