Michael L. Baker, Marzio Rancan, Floriana Tuna, Grigore A. Timco, David Collison, Hannu Mutka, Hans-Ulrich Güdel, Robin J. Pritchard, Richard E. P. Winpenny and Eric J. L. McInnes
Synthesis and Structural, Magnetic and EPR Characterization of Discrete Finite Antiferromagnetic Chains
Appl. Magn. Reson. 37, 685-692 (2010)                 

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.