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Synthesis and Structural, Magnetic and EPR Characterization of Discrete Finite Antiferromagnetic Chains |
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| Authors: | Michael L Baker Marzio Rancan Floriana Tuna Grigore A Timco David Collison Hannu Mutka Hans-Ulrich Güdel Robin J Pritchard Richard E P Winpenny Eric J L McInnes |
| Institution: | 1. School of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, UK 2. Institute Laue-Langevin, Grenoble, France 3. Department of Chemistry and Biochemistry, University of Berne, Bern, Switzerland |
| Abstract: | The synthesis, magnetic and electron paramagnetic resonance (EPR) characterisation of isolated, discrete, {Cr n III } antiferromagnetically coupled chain complexes is reported for n = 6 and 7. Previous studies had reported supramolecular linked {Cr n III } x species. For n = 6, the lowest lying total spin state is diamagnetic with S = 1 and 2 first and second excited states, respectively; for n = 7, the lowest lying total spin state is S = 3/2 with S = 1/2 and 5/2 first and second excited states, respectively. The zero-field splittings of these states are well defined by low-temperature, multi-frequency EPR spectroscopy. |
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