The first crystal structures of a dinuclear iron(II) complex with three N1,N2-1,2,4-triazole bridges in the high-spin and low-spin states are reported. Its sharp spin transition, which was probed using X-ray, calorimetric, magnetic, and (57)Fe Mossbauer analyses, is also delineated in the crystalline state by variable-temperature fluorimetry for the first time.
Garcia, Y., Robert, F., Naik, A. D., Zhou, G., Tinant, B., Robeyns, K., Michotte, S., & Piraux, L. (2011). Spin Transition Charted in a Fluorophore-Tagged Thermochromic Dinuclear Iron(II) Complex. Journal of the American chemical society, 133(40), 15850-15853. https://doi.org/10.1021/ja205974q (Original work published 2011)