Abstract
The spin crossover behaviour of a new class of FeII coordination polymers [Fe(phtptrz)3]I2 (1), [Fe(phtptrz)3](ReO4)2•CH3OH (2) and [Fe(phtptrz)3]TaF7•6H2O (3) based on a novel ligand 4-(3′ -N-phtalimido-propyl)-1,2,4-triazole (phtptrz), were investigated by temperature dependent 57Fe Mössbauer spectroscopy and magnetic susceptibility measurements. The adverse effect of bulky substituent on 1,2,4-triazole, favorable supramolecular interactions and influence of increasing anion size on spin crossover profile is discussed. 1 and 2 show thermally induced spin conversions of gradual and incomplete nature with associated thermochromism, and transition temperatures T1/2 ~ 163 K and 137 K, respectively. A spin state crossover is also identified for 3.
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Dîrtu, M.M., Gillard, D., Naik, A.D., Rotaru, A., Garcia, Y. (2013). Weak cooperativity in selected iron(II) 1D coordination polymers. In: Yoshida, Y. (eds) ICAME 2011. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-4762-3_35
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DOI: https://doi.org/10.1007/978-94-007-4762-3_35
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-007-4761-6
Online ISBN: 978-94-007-4762-3
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