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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Van Koningsbruggen, Petra
Aston University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (6/6 displayed)
- 2009Valence-tautomeric RbMnFe Prussian blue analoguescitations
- 2008Study of neutral Fe(III) complexes of pyridoxal-N-substituted thiosemicarbazone with desolvation induced spin-state transformation above room temperaturecitations
- 2007Crystal structure and magnetic behaviour of a five-coordinate iron(III) complex of pyridoxal-4-methylthiosemicarbazonecitations
- 2002catena-[μ-tris(1,2-bis(tetrazol-1-yl)ethane-N4,N4')iron(II)] bis(tetrafluoroborate): Synthesis, structure, spectroscopic and magnetic characterisation of a chain-type coordination polymer spin-crossover compound.citations
- 2000Synthesis, crystal structure, EXAFS, and magnetic properties of catena [μ-tris(1,2-bis(tetrazol-1-yl)propane-N1,N1')iron(II)] bis(perchlorate).citations
- 2000Synthesis, crystal structure, spectroscopic and magnetic properties of a novel unprecedented three-dimensional CuII coordination compound of of 1,2-Bis(1,2,4-triazol-4-yl)ethane
Places of action
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article
Synthesis, crystal structure, EXAFS, and magnetic properties of catena [μ-tris(1,2-bis(tetrazol-1-yl)propane-N1,N1')iron(II)] bis(perchlorate).
Abstract
<p>[Fe(btzp)<sub>3</sub>](ClO<sub>4</sub>)<sub>2</sub> (btzp = 1,2-bis(tetrazol-1-yl)propane) represents the first structurally characterized Fe(II) linear chain compound exhibiting thermal spin crossover. It shows a very gradual spin transition (T<sub>1/2</sub> = 130 K) which has been followed by magnetic susceptibility measurements and <sup>57</sup>Fe Mössbauer spectroscopy. The structure has been solved at 200 and 100 K by single-crystal X-ray analysis. It crystallizes in the trigonal space group P3c1 with Z = 2 Fe(II) units at both temperatures. The molecular structure consists of chains running along the c axis in which the Fe(II) ions are linked by three <em>N</em>4,<em>N</em>4' coordinating bis(tetrazole) ligands. The main difference between the two forms appears to be in the Fe-N bond lengths, which are 2.164(4) A at 200 K and 2.038(4) A at 100 K. The Fe-Fe separations are 7.422(1) Å at 200 K and 7.273(1) A at 100 K. The EXAFS results are consistent with the crystal structure. In both spin states, the FeN6 octahedron is almost regular within the EXAFS resolution. The Fe-N distance is found as 2.16(2)Åat 300 K and 2.00(2) Å at 40 K. The absence of the "7 Å peak" in the EXAFS spectra of [Fe(btzp)<sub>3</sub>](ClO<sub>4</sub>)<sub>2</sub>, in contrast with what has been observed for the [Fe(4-R-1,2,4-triazole)<sub>3</sub>]-(anion)<sub>2</sub> chain compounds, confirms that this peak can be used as the signature of a metal alignment only when it involves a strongly enhanced multiple scattering M-M-M path, with M-M spacing less than 4 A. Irradiation with green light at 5 K has led to the population of the metastable high-spin state for the iron(II) ion. The nature of the spin-crossover behavior has been discussed on the basis of the structural features.</p>