Extending the Distance Range in Double Electron–Electron Resonance Measurements of Transition Metal Clusters

Journal of the American Chemical Society 2026 Open access

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Authors: Selena J. Lockyer, Lubomir Loci, Adam Brookfield, Grigore A. Timco, George F. S. Whitehead, Shanshan Wan, Alice M. Bowen, R. Winpenny, Eric J. L. McInnes
DOI: 10.1021/jacs.5c20715
Cited by: 1
References: 33

Abstract

We report ligand manipulation of high-nuclearity, paramagnetic transition metal clusters based on heterometallic {Cr 7 Ni} rings to significantly prolong electron spin phase memory time constants. This enables the application of Double Electron–Electron Resonance (DEER) spectroscopy methods to measure cluster···cluster interactions to longer distances. Specifically, replacing bridging pivalates by cyclopropyl-carboxylates enables DEER up to 4.2 nm. This is applied to four new hybrid [2]- and [3]rotaxanes based on hetero- and homodimers, respectively, of {Cr 7 Ni} rings about organic threads. The crystal structures of these supramolecules are reported and are in excellent agreement with the DEER results.

Fields of Study & Subjects

Magnetism in coordination complexes Supramolecular Chemistry and Complexes Synthesis and Properties of Aromatic Compounds

Publication details

Journal / source
Journal of the American Chemical Society
Publisher
American Chemical Society (ACS)
Volume
148
Issue
3
Pages
2896–2901
Publication date
13 January 2026
Language
EN