Abstract
A series of 1D coordination polymers [Fe(patrz)3]X2·solv, (patrz = 1,2,4-triazol-4-yl-propanoic acid; X = BF\(_{4}^{-}\), ClO\(_{4}^{-}\), Cl − , NO\(_{3}^{-}\) and solv = MeOH or H2O) were precipitated from methanol. Their spin crossover properties were studied by temperature dependent SQUID magnetometry and 57Fe Mössbauer spectroscopy, both for solvated and desolvated complexes. Compounds show gradual incomplete spin crossover with distinct thermochromism, in particular [Fe(patrz)3](BF4)2·MeOH, for which only 27% of FeII ions are switched to the low-spin state at 77 K, as determined by a detailed 57Fe Mössbauer study. Other prominent features of this work are the interesting self assembly of 1D chain with exclusively triazole coordination from patrz ligand despite its ditopic nature and a hysteretic room temperature spin crossover in [Fe(patrz)3]Cl2.
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References
Kahn, O., Kröber, J., Jay, C.: Spin transition molecular materials for displays and data recording. Adv. Mater. 4, 718 (1992)
Garcia, Y., Ksenofontov, V., Gütlich, P.: Spin transition molecular materials: new sensors. Hyperfine Interact. 139/140, 543 (2002)
Garcia, Y., Niel, V., Muñoz, M.C., Real, J.A.: Spin crossover in 1D, 2D and 3D polymeric Fe(II) networks; spin crossover in transition metal compounds I. Top. Curr. Chem. 233, 229 (2004)
Dîrtu, M.M., Schmit, F., Naik, A.D., Rotaru, A., Marchand-Brynaert, J., Garcia, Y.: Spin transition sensors based on β-amino-acid 1,2,4-triazole derivative. Int. J. Mol. Sci. 12, 5339 (2011)
Dîrtu, M.M., Naik, A.D., Marchand-Brynaert, J., Garcia, Y.: Room temperature hysteretic spin transition in 1D iron(II) coordination polymers. J. Phys. Conf. Ser. 217, 012085 (2010)
Naik, A.D., Marchand-Brynaert, J., Garcia, Y.: A simplified approach to N- and N,N’-linked 1,2,4-triazoles by transamination. Synthesis 1, 149 (2008)
Garcia, Y., Grunert, M., Reiman, S., van Campenhoudt, O., Gütlich, P.: The two-step spin conversion in a supramolecular triple helicate dinuclear iron(II) complex studied by Mössbauer spectroscopy. Eur. J. Inorg. Chem. 3333 (2006)
Šalitroš, I., Madhu, N. T. , Boča, R., Pavlik, J., Ruben, M.: Room temperature spin transition iron compounds. Monatsch. Chem. 140, 695 (2009)
Garcia, Y., van Koningsbruggen, P.J., Lapouyade, R., Rabardel, L., Kahn, O., Wieczorek, M., Bronisz, R., Ciunik, Z., Rudolf, M.F.: Synthesis and spin crossover characteristics of polynuclear 4-(2′-hydroxy-ethyl)-1,2,4-triazole Fe(II) molecular materials. C. R. Acad. Sci. Paris IIc, pp 523 (1998)
Dîrtu, M.M., Rotaru, A., Gillard, D., Linares, J., Codjovi, E., Tinant, B., Garcia, Y.: Prediction of the spin transition temperature in FeII one dimensional coordination polymers: an anion based database. Inorg. Chem. 48, 7838–7852 (2009)
Dîrtu, M.M., Garcia, Y., Nica, M., Rotaru, A., Linares, J., Varret, F.: Iron(II) spin transition 1,2,4-triazole chain compounds with novel inorganic fluorinated counteranions. Polyhedron 26, 2259 (2007)
Varnek, V.A., Kryuchkova, N.A., Bushuev, M.B.: Quantum chemical calculations of the isomer shift in iron(II) complexes of 1,2,4-triazoles with a 1A\(_{1}\Leftrightarrow^{5}\)T2 spin transition. J. Struct. Chem. 47, 1177 (2006)
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Railliet, A.P., Naik, A.D., Rotaru, A. et al. 1D iron(II) spin crossover complexes with 1,2,4-triazol-4-yl-propanoic acid. Hyperfine Interact 205, 51–55 (2012). https://doi.org/10.1007/s10751-011-0413-6
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DOI: https://doi.org/10.1007/s10751-011-0413-6