Synthesis, structure, and magnetic properties of a Tris[3-(2-pyridyl)-l,2,4triazole]iron(II) spin-crossover complex

Research output: Contribution to journal › Article › Research › peer review

Authors

  • Arno F. Stassen
  • Matthijs De Vos
  • Petra J. Van Koningsbruggen
  • Franz Renz
  • Jürgen Ensling
  • Huub Kooijman
  • Anthony L. Spek
  • Jaap G. Haasnoot
  • Philipp Gütlich
  • Jan Reedijk

External Research Organisations

  • Leiden University
  • Utrecht University
  • Johannes Gutenberg University Mainz
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Details

Original languageEnglish
Pages (from-to)2231-2237
Number of pages7
JournalEuropean Journal of Inorganic Chemistry
Issue number10
Publication statusPublished - 2000
Externally publishedYes

Abstract

The synthesis and characterization of tris[3-(pyridin-2-yl)1,2,4-triazole]iron{II) bis(tetrafluoroborate), obtained from the reaction of 3-(pyridin-2-yl)-1,2,4-triazole (Hpt) and hexaaquairon(II) tetrafluoroborate, [Fe(H2O)6](BF4)2, is described, together with its crystal structures at two temperatures. Xray crystallographic parameters are as follows: [Fe(Hpt)3](BF4)2-nH2O (n = 2) at 250 K: orthorhombic space group Pbam, a - 15.8068(18) A, b = 17.2800(14) A, c = 21.215(2) A, V = 5794.7(10) A3, and Z = 8. [Fe(Hpt)3](BF4)2-nH2O (n = 2) at 95 K: orthorhombic space group Pbam, a = 15.7080(12) A, b = 17.1023(16) A, c = 21.006(2) A, V= 5643.1(9) A3, and Z = 8. The Fe" ions are (at both temperatures) octahedrally surrounded in a mer-configuration. The complex has been subjected to both 57Fe Mössbauer spectroscopy and magnetic susceptibility measurements. The 57Fe Mössbauer spectrum shows the presence of two different iron(II) sites. The high-spin fraction vs. T curve of the crossover, obtained by SQUID measurements, is gradual and without hysteresis, with T1/2 = 135 K.

Keywords

    Iron, Magnetic properties, Moessbauer spectroscopy, N ligands, Spin crossover

ASJC Scopus subject areas

Cite this

Synthesis, structure, and magnetic properties of a Tris[3-(2-pyridyl)-l,2,4triazole]iron(II) spin-crossover complex. / Stassen, Arno F.; De Vos, Matthijs; Van Koningsbruggen, Petra J. et al.
In: European Journal of Inorganic Chemistry, No. 10, 2000, p. 2231-2237.

Research output: Contribution to journal › Article › Research › peer review

Stassen, AF, De Vos, M, Van Koningsbruggen, PJ, Renz, F, Ensling, J, Kooijman, H, Spek, AL, Haasnoot, JG, Gütlich, P & Reedijk, J 2000, 'Synthesis, structure, and magnetic properties of a Tris[3-(2-pyridyl)-l,2,4triazole]iron(II) spin-crossover complex', European Journal of Inorganic Chemistry, no. 10, pp. 2231-2237. https://doi.org/10.1002/1099-0682(200010)2000:10<2231::AID-EJIC2231>3.0.CO;2-B
Stassen, A. F., De Vos, M., Van Koningsbruggen, P. J., Renz, F., Ensling, J., Kooijman, H., Spek, A. L., Haasnoot, J. G., Gütlich, P., & Reedijk, J. (2000). Synthesis, structure, and magnetic properties of a Tris[3-(2-pyridyl)-l,2,4triazole]iron(II) spin-crossover complex. European Journal of Inorganic Chemistry, (10), 2231-2237. https://doi.org/10.1002/1099-0682(200010)2000:10<2231::AID-EJIC2231>3.0.CO;2-B
Stassen AF, De Vos M, Van Koningsbruggen PJ, Renz F, Ensling J, Kooijman H et al. Synthesis, structure, and magnetic properties of a Tris[3-(2-pyridyl)-l,2,4triazole]iron(II) spin-crossover complex. European Journal of Inorganic Chemistry. 2000;(10):2231-2237. doi: 10.1002/1099-0682(200010)2000:10<2231::AID-EJIC2231>3.0.CO;2-B
Stassen, Arno F. ; De Vos, Matthijs ; Van Koningsbruggen, Petra J. et al. / Synthesis, structure, and magnetic properties of a Tris[3-(2-pyridyl)-l,2,4triazole]iron(II) spin-crossover complex. In: European Journal of Inorganic Chemistry. 2000 ; No. 10. pp. 2231-2237.
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title = "Synthesis, structure, and magnetic properties of a Tris[3-(2-pyridyl)-l,2,4triazole]iron(II) spin-crossover complex",
abstract = "The synthesis and characterization of tris[3-(pyridin-2-yl)1,2,4-triazole]iron{II) bis(tetrafluoroborate), obtained from the reaction of 3-(pyridin-2-yl)-1,2,4-triazole (Hpt) and hexaaquairon(II) tetrafluoroborate, [Fe(H2O)6](BF4)2, is described, together with its crystal structures at two temperatures. Xray crystallographic parameters are as follows: [Fe(Hpt)3](BF4)2-nH2O (n = 2) at 250 K: orthorhombic space group Pbam, a - 15.8068(18) A, b = 17.2800(14) A, c = 21.215(2) A, V = 5794.7(10) A3, and Z = 8. [Fe(Hpt)3](BF4)2-nH2O (n = 2) at 95 K: orthorhombic space group Pbam, a = 15.7080(12) A, b = 17.1023(16) A, c = 21.006(2) A, V= 5643.1(9) A3, and Z = 8. The Fe{"} ions are (at both temperatures) octahedrally surrounded in a mer-configuration. The complex has been subjected to both 57Fe M{\"o}ssbauer spectroscopy and magnetic susceptibility measurements. The 57Fe M{\"o}ssbauer spectrum shows the presence of two different iron(II) sites. The high-spin fraction vs. T curve of the crossover, obtained by SQUID measurements, is gradual and without hysteresis, with T1/2 = 135 K.",
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Download

TY - JOUR

T1 - Synthesis, structure, and magnetic properties of a Tris[3-(2-pyridyl)-l,2,4triazole]iron(II) spin-crossover complex

AU - Stassen, Arno F.

AU - De Vos, Matthijs

AU - Van Koningsbruggen, Petra J.

AU - Renz, Franz

AU - Ensling, Jürgen

AU - Kooijman, Huub

AU - Spek, Anthony L.

AU - Haasnoot, Jaap G.

AU - Gütlich, Philipp

AU - Reedijk, Jan

PY - 2000

Y1 - 2000

N2 - The synthesis and characterization of tris[3-(pyridin-2-yl)1,2,4-triazole]iron{II) bis(tetrafluoroborate), obtained from the reaction of 3-(pyridin-2-yl)-1,2,4-triazole (Hpt) and hexaaquairon(II) tetrafluoroborate, [Fe(H2O)6](BF4)2, is described, together with its crystal structures at two temperatures. Xray crystallographic parameters are as follows: [Fe(Hpt)3](BF4)2-nH2O (n = 2) at 250 K: orthorhombic space group Pbam, a - 15.8068(18) A, b = 17.2800(14) A, c = 21.215(2) A, V = 5794.7(10) A3, and Z = 8. [Fe(Hpt)3](BF4)2-nH2O (n = 2) at 95 K: orthorhombic space group Pbam, a = 15.7080(12) A, b = 17.1023(16) A, c = 21.006(2) A, V= 5643.1(9) A3, and Z = 8. The Fe" ions are (at both temperatures) octahedrally surrounded in a mer-configuration. The complex has been subjected to both 57Fe Mössbauer spectroscopy and magnetic susceptibility measurements. The 57Fe Mössbauer spectrum shows the presence of two different iron(II) sites. The high-spin fraction vs. T curve of the crossover, obtained by SQUID measurements, is gradual and without hysteresis, with T1/2 = 135 K.

AB - The synthesis and characterization of tris[3-(pyridin-2-yl)1,2,4-triazole]iron{II) bis(tetrafluoroborate), obtained from the reaction of 3-(pyridin-2-yl)-1,2,4-triazole (Hpt) and hexaaquairon(II) tetrafluoroborate, [Fe(H2O)6](BF4)2, is described, together with its crystal structures at two temperatures. Xray crystallographic parameters are as follows: [Fe(Hpt)3](BF4)2-nH2O (n = 2) at 250 K: orthorhombic space group Pbam, a - 15.8068(18) A, b = 17.2800(14) A, c = 21.215(2) A, V = 5794.7(10) A3, and Z = 8. [Fe(Hpt)3](BF4)2-nH2O (n = 2) at 95 K: orthorhombic space group Pbam, a = 15.7080(12) A, b = 17.1023(16) A, c = 21.006(2) A, V= 5643.1(9) A3, and Z = 8. The Fe" ions are (at both temperatures) octahedrally surrounded in a mer-configuration. The complex has been subjected to both 57Fe Mössbauer spectroscopy and magnetic susceptibility measurements. The 57Fe Mössbauer spectrum shows the presence of two different iron(II) sites. The high-spin fraction vs. T curve of the crossover, obtained by SQUID measurements, is gradual and without hysteresis, with T1/2 = 135 K.

KW - Iron

KW - Magnetic properties

KW - Moessbauer spectroscopy

KW - N ligands

KW - Spin crossover

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U2 - 10.1002/1099-0682(200010)2000:10<2231::AID-EJIC2231>3.0.CO;2-B

DO - 10.1002/1099-0682(200010)2000:10<2231::AID-EJIC2231>3.0.CO;2-B

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JO - European Journal of Inorganic Chemistry

JF - European Journal of Inorganic Chemistry

SN - 1434-1948

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