The MagLab is funded by the National Science Foundation and the State of Florida.
The MagLab is funded by the National Science Foundation and the State of Florida.
The transmission instrument is a flexible 24-980 GHz multifrequency cw-EPR spectrometer with a 16 T superconducting magnet. The instrument is particularly useful in studies on the transition metal complex compounds exhibiting large zero-field splittings and resolving very small g-anisotropies.
This instrument is equipped with a number of sources consisting of synthesizers combined with a series of exchangeable frequency multipliers. The detector is a broadband helium-cooled bolometer, which enables operation frequencies over the very wide range of 24-980 GHz though there are some gaps. The instrument does not employ a resonator. However, samples may be large thus offsetting the sensitivity disadvantage in terms of concentration sensitivity. For accurate g-value measurements, the use of g-value standards is recommended (e.g. DPPH, Si:P, or hydrogen atoms trapped in a nano cage of octaisobutylsilsesquioxane). The microwave frequency is accurate to at least 6 significant digits.
Transition metal complexes, lanthanide complexes as well as organic radicals have been studied on this spectrometer.
The most convenient sample container is a polyethylene vial
Fisherbrand™ Polyethylene Sample Vials with Hinged Cap
A well ground sample in such vial should be squeezed with a Teflon rod
Chemical-Resistant Ultra-Low-Friction PTFE Rods
Air sensitive samples require special arrangements.
Explore our magnet schedule to see what exciting research is happening on our stellar fleet of instruments right now.
Credit: National MagLab
Mohar, J.S.; Bhunia, M.; Laughlin, A.L.; Ozarowski, A.; Krzystek, J.; Keller, T.M.; Gau, M.R.; Lancaster, K.L.; Telser, J.; Mindiola, D.M., Titanium Phosphinidene and Phosphide Moieties from Oxidative Phosphorylation and Desilylation, Journal of American Chemical Society, 147, 11625-11631 (2025) https://doi.org/10.1021/jacs.4c12242
Russel, J.B.; Jafari, M.G.; Kim, J.H.; Pudasaini, B.; Ozarowski, A.; Telser, J.; Baik, M.H.; Mindiola, D.J., Ynamide and Azaalleneyl. Acid-Base Promoted Chelotropic and Spin-State Rearrangements in a Versatile Heterocumulene [(Ad)NCC(tBu)]-, Angewandte Chemie International Edition, 63 (e2024014), 1-6 (2024) https://doi.org/10.1002/anie.202401433
Ozarowski, A., High-Field EPR Studies on Three Binuclear μ-Oxo-Bridged Iron(III) Complexes: Na4[Fe(edta)]2O3H2O, [Fe(phen)2(H2O)]2O(NO3)4⋅5H2O and [Fe(salen)]2O, European Journal of Inorganic Chemistry, 2024 (e202400565), 1-9. https://doi.org/10.1002/ejic.202400565
Tin, P.; Jenkins, J.J.; Xing, J.; Caci, N.; Gai, Z.; Jin, R.; Wessel, S.; Krzystek, J.; Li, C.; Daemen, L.L.; Cheng, Y.; Xue, Z.L., Haldane topological spin-1 chains in a planar metal-organic framework, Nature Communications, 14, 5454 (2023) https://doi.org/10.1038/s41467-023-41014-1
Ngo, D.X.; McClain, K.R.; Hrubý, J.; Franzke, Y.J.; Kundu, K.; Kwon, H.; Gould, C.A.; Harvey, B.G.; Hill, S.; Long, J.R., Large Hyperfine Coupling Arising from Pseudo-2S Ground States in a Series of Lutetium(II) Metallocene Complexes, Journal of American Chemical Society, 147 (16), 13799-13807 (2025) https://doi.org/10.1021/jacs.5c01947
Last modified on 15 May 2026
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