European Journal of Chemistry 2014, 5(1), 176-180 | doi: https://doi.org/10.5155/eurjchem.5.1.176-180.972 | Get rights and content






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A Mössbauer study on iron(II) complex of 2-acetyl-1,3-indandione ⎼ spin-crossover or structural changes


Ventzislav Rusanov (1,*) , Anife Ahmedova (2) , Mariana Mitewa (3)

(1) University of Sofia, Faculty of Physics, Department of Atomic Physics, Sofia, 1164, Bulgaria
(2) University of Sofia, Faculty of Chemistry and Pharmacy, Department of Analytical Chemistry, Sofia 1164, Bulgaria
(3) University of Sofia, Faculty of Chemistry and Pharmacy, Department of Analytical Chemistry, Sofia 1164, Bulgaria
(*) Corresponding Author

Received: 15 Nov 2013 | Revised: 04 Dec 2013 | Accepted: 10 Dec 2013 | Published: 31 Mar 2014 | Issue Date: March 2014

Abstract


An air stable Fe(II) complex of a cyclic β-triketone, 2-acetyl-1,3-indandione (2AID) was obtained in two different ways and studied by Mössbauer spectroscopy. The Mössbauer data at room temperature point to six-coordinated, high spin Fe(II) complex. The temperature-dependent measurements indicate a phase transition in going from 293 to 77 K. Further lowering the temperature, however, do not cause the expected changes for spin-crossover transition. This data provoked application of quantum chemical methods to determine the origin of the observed appearance of spectral component attributable to low spin Fe(II) complex at 77 K. Based on the results from the theoretical calculations of the Mössbauer parameters of several different geometries and spin states of the Fe complexes of 2AID it was possible to conclude that the obtained Fe(II) complex has a pseudo-octahedral geometry. The experimentally observed temperature-dependence of the Mössbauer spectra is attributed to changes of the axial Fe-O bonds, rather than to spin transition. Discussion is given on the role of the type of the axial ligands for conditioning a spin-crossover process, as suggestion for experimental modelling of novel target materials with desired magnetic properties.


Keywords


Fe(II) complex; 1,3-Indandione; Cyclic triketone; Mössbauer spectroscopy; Intermolecular interactions; Quantum-chemical calculations

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DOI: 10.5155/eurjchem.5.1.176-180.972

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Bulgarian Ministry of Education and Science, Bulgaria

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How to cite


Rusanov, V.; Ahmedova, A.; Mitewa, M. Eur. J. Chem. 2014, 5(1), 176-180. doi:10.5155/eurjchem.5.1.176-180.972
Rusanov, V.; Ahmedova, A.; Mitewa, M. A Mössbauer study on iron(II) complex of 2-acetyl-1,3-indandione ⎼ spin-crossover or structural changes. Eur. J. Chem. 2014, 5(1), 176-180. doi:10.5155/eurjchem.5.1.176-180.972
Rusanov, V., Ahmedova, A., & Mitewa, M. (2014). A Mössbauer study on iron(II) complex of 2-acetyl-1,3-indandione ⎼ spin-crossover or structural changes. European Journal of Chemistry, 5(1), 176-180. doi:10.5155/eurjchem.5.1.176-180.972
Rusanov, Ventzislav, Anife Ahmedova, & Mariana Mitewa. "A Mössbauer study on iron(II) complex of 2-acetyl-1,3-indandione ⎼ spin-crossover or structural changes." European Journal of Chemistry [Online], 5.1 (2014): 176-180. Web. 3 Jul. 2020
Rusanov, Ventzislav, Ahmedova, Anife, AND Mitewa, Mariana. "A Mössbauer study on iron(II) complex of 2-acetyl-1,3-indandione ⎼ spin-crossover or structural changes" European Journal of Chemistry [Online], Volume 5 Number 1 (31 March 2014)

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DOI Link: https://doi.org/10.5155/eurjchem.5.1.176-180.972

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