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Complexation of Europium(III) by Bis(dialkyltriazinyl)bipyridines in 1-octanol

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Authors

  • Michael Steppert
  • Ivana Císařová
  • Thomas Fanghänel
  • Andreas Geist
  • Clemens Walther

External Research Organisations

  • Karlsruhe Institute of Technology (KIT)
  • Charles University
  • European Commission Joint Research Centre (JRC)
  • Heidelberg University
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Original languageEnglish
Pages (from-to)591-600
Number of pages10
JournalInorganic chemistry
Volume51
Issue number1
Publication statusPublished - 1 Dec 2012
Externally publishedYes

Abstract

The present work focuses on highly selective ligands for An III/Ln III separation: bis(triazinyl)bipyridines (BTBPs). By combining time-resolved laser-induced fluorescence spectroscopy, nanoelectrospray ionization mass spectrometry, vibronic sideband spectroscopy, and X-ray diffraction, we obtain a detailed picture of the structure and stoichiometry of the first coordination sphere of Eu III-BTBP complexes in an octanolic solution. The main focus is on the 1:2 complexes because extraction studies revealed that those are the species extracted into the organic phase. The investigations on europium(III) complexes of BTBP with different triazin alkylation revealed differences in the formed complexes due to the bulkiness of the ligands. Because of the vibronic sidebands in the fluorescence spectra, we were able to detect whether or not nitrate ligands are coordinated in the first coordination sphere of the Eu-BTBP complexes. In solution, less sterically demanding BTBP offers enough space for additional coordination of anions and/or solvent molecules to form 9-coordinated Eu-BTBP 1:2 complexes, while bulkier ligands tend to form 8-fold-coordinated structures. We also report the first crystal structure of a Ln-BTBP 1:2 complex and that of its 1:1 complex, both of which are 10-coordinated.

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Cite this

Complexation of Europium(III) by Bis(dialkyltriazinyl)bipyridines in 1-octanol. / Steppert, Michael; Císařová, Ivana; Fanghänel, Thomas et al.
In: Inorganic chemistry, Vol. 51, No. 1, 01.12.2012, p. 591-600.

Research output: Contribution to journalArticleResearchpeer review

Steppert, M, Císařová, I, Fanghänel, T, Geist, A, Lindqvist-Reis, P, Panak, P, Štěpnička, P, Trumm, S & Walther, C 2012, 'Complexation of Europium(III) by Bis(dialkyltriazinyl)bipyridines in 1-octanol', Inorganic chemistry, vol. 51, no. 1, pp. 591-600. https://doi.org/10.1021/ic202119x
Steppert, M., Císařová, I., Fanghänel, T., Geist, A., Lindqvist-Reis, P., Panak, P., Štěpnička, P., Trumm, S., & Walther, C. (2012). Complexation of Europium(III) by Bis(dialkyltriazinyl)bipyridines in 1-octanol. Inorganic chemistry, 51(1), 591-600. https://doi.org/10.1021/ic202119x
Steppert M, Císařová I, Fanghänel T, Geist A, Lindqvist-Reis P, Panak P et al. Complexation of Europium(III) by Bis(dialkyltriazinyl)bipyridines in 1-octanol. Inorganic chemistry. 2012 Dec 1;51(1):591-600. doi: 10.1021/ic202119x
Steppert, Michael ; Císařová, Ivana ; Fanghänel, Thomas et al. / Complexation of Europium(III) by Bis(dialkyltriazinyl)bipyridines in 1-octanol. In: Inorganic chemistry. 2012 ; Vol. 51, No. 1. pp. 591-600.
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title = "Complexation of Europium(III) by Bis(dialkyltriazinyl)bipyridines in 1-octanol",
abstract = "The present work focuses on highly selective ligands for An III/Ln III separation: bis(triazinyl)bipyridines (BTBPs). By combining time-resolved laser-induced fluorescence spectroscopy, nanoelectrospray ionization mass spectrometry, vibronic sideband spectroscopy, and X-ray diffraction, we obtain a detailed picture of the structure and stoichiometry of the first coordination sphere of Eu III-BTBP complexes in an octanolic solution. The main focus is on the 1:2 complexes because extraction studies revealed that those are the species extracted into the organic phase. The investigations on europium(III) complexes of BTBP with different triazin alkylation revealed differences in the formed complexes due to the bulkiness of the ligands. Because of the vibronic sidebands in the fluorescence spectra, we were able to detect whether or not nitrate ligands are coordinated in the first coordination sphere of the Eu-BTBP complexes. In solution, less sterically demanding BTBP offers enough space for additional coordination of anions and/or solvent molecules to form 9-coordinated Eu-BTBP 1:2 complexes, while bulkier ligands tend to form 8-fold-coordinated structures. We also report the first crystal structure of a Ln-BTBP 1:2 complex and that of its 1:1 complex, both of which are 10-coordinated.",
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AU - Steppert, Michael

AU - Císařová, Ivana

AU - Fanghänel, Thomas

AU - Geist, Andreas

AU - Lindqvist-Reis, Patric

AU - Panak, Petra

AU - Štěpnička, Petr

AU - Trumm, Sascha

AU - Walther, Clemens

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