Magnetic properties and crystal structure of a pyridine-substituted iminonitroxide biradical, 3,5-bis(4,4,5,5,-tetramethyl-4,5-dihydro-1H-imidazol-2-yl-1-oxyl)pyridine (1), were examined. The molecular ground state of 1 was found to be triplet (S = 1) with a singlet-triplet energy gap of 2J/kB = 7.0 K. The triplet biradical serves as a building block for molecule-based magnets of S > 1/2 based on intermolecular noncovalent bonds.
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Hayakawa, K., Ise, T., Shiomi, D. et al. Building Blocks for Organic Heterospin, Heteromolecular Complexes as Models for Organic Molecule-Based Ferrimagnets. J Low Temp Phys 142, 589–592 (2006). https://doi.org/10.1007/s10909-006-9107-x
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DOI: https://doi.org/10.1007/s10909-006-9107-x