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Structural diversity of salts of terpyridine derivatives with europium(III) located in both, cation and anion, in comparison to molecular complexes

  • Alexander E. Sedykh ORCID logo , Robin Bissert , Dirk G. Kurth ORCID logo and Klaus Müller-Buschbaum ORCID logo EMAIL logo
Published/Copyright: August 10, 2020
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Zeitschrift für Kristallographie - Crystalline Materials
From the journal Zeitschrift für Kristallographie - Crystalline Materials Volume 235 Issue 8-9

Abstract

Three salts of the common composition [EuCl2(X-tpy)2][EuCl4(X-tpy)]·nMeCN were obtained from EuCl3·6H2O and the respective organic ligands (X-tpy = 4′-phenyl-2,2′:6′,2″-terpyridine ptpy, 4′-(pyridin-4-yl)-2,2′:6′,2″-terpyridine 4-pytpy, and 4′-(pyridin-3-yl)-2,2′:6′,2″-terpyridine 3-pytpy). These ionic complexes are examples of salts, in which both cation and anion contain Eu3+ with the same organic ligands and chlorine atoms coordinated. As side reaction, acetonitrile transforms into acetamide resulting in the crystallization of the complex [EuCl3(ptpy)(acetamide)] (4). Salts [EuCl2(ptpy)2][EuCl4(ptpy)]·2.34MeCN (1), [EuCl2(4-pytpy)2][EuCl4(4-pytpy)]·0.11MeCN (2), and [EuCl2(3-pytpy)2][EuCl4(3-pytpy)]·MeCN (3) crystallize in different structures (varying in space group and crystal packing) due to variation of the rear atom of the ligand to a coordinative site. Additionally, we show and compare structural variability through the dimeric complexes [Eu2Cl6(ptpy)2(N,N′-spacer)]·N,N′-spacer (5, 6, 7) obtained from [EuCl3(ptpy)(py)] by exchanging the end-on ligand pyridine with several bipyridines (4,4′-bipyridine bipy, 1,2-bis(4-pyridyl)ethane bpa, and 1,2-bis(2-pyridyl)ethylene bpe). In addition, photophysical (photoluminescence) and thermal properties are presented.

Keywords: crystallography; europium; luminescence; N ligands

Dedicated to Professor Dr. Ulrich Müller on the occasion of his 80th birthday.

Corresponding author: Klaus Müller-Buschbaum, Institute of Inorganic and Analytical Chemistry, Justus-Liebig-University Giessen, Heinrich-Buff-Ring 17, 35392Giessen, Germany; and Center for Materials Research (LaMa), Justus-Liebig-University Giessen, Heinrich-Buff-Ring 16, 35392Giessen, Germany, E-mail: .

Acknowledgments

Alexander E. Sedykh acknowledges the Studienstiftung des deutschen Volkes for a Ph.D. scholarship. The authors acknowledge Stephanie Maaß (Chemical Technology of Advanced Materials, Julius-Maximilians-Universität Würzburg) for synthesis of 4′-phenyl-2,2′:6′,2″-terpyridine.

  1. Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: The Studienstiftung des Deutschen Volkes.

  3. Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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Supplementary Material

The online version of this article offers supplementary material (https://doi.org/10.1515/zkri-2020-0053).

Received: 2020-05-09
Accepted: 2020-06-23
Published Online: 2020-08-10
Published in Print: 2020-09-25

© 2020 Walter de Gruyter GmbH, Berlin/Boston

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https://doi.org/10.1515/zkri-2020-0053
Keywords for this article
crystallography; europium; luminescence; N ligands

Articles in the same Issue

  1. Frontmatter
  2. In this issue
  3. Original papers
  4. Ulrich Müller zum 80. Geburtstag gewidmet
  5. Laboratory synthesis and characterization of Knasibfite K3Na4[SiF6]3[BF4] and the homologous Ge compound K3Na4[GeF6]3[BF4]
  6. The crystal structures of α-Rb7Sb3Br16, α- and β-Tl7Bi3Br16 and their relationship to close packings of spheres
  7. Beryllium triflates: synthesis and structure of BeL2(OTf)2 (L=H2O, THF, nBu2O)
  8. Synthesis and crystal structures of two layered Cu(I) and Ag(I) iodidometalates
  9. New mixed-valent alkali chain sulfido ferrates A1+x[FeS2] (A = K, Rb, Cs; x = 0.333–0.787)
  10. Structure solution of incommensurately modulated La6MnSb15
  11. Polymorphs of VO(PO3)2: synthesis and crystal structure refinement revisited
  12. On tungstates of divalent cations (III) – Pb5O2[WO6]
  13. Hydrogen order in hydrides of Laves phases
  14. High-pressure synthesis of SmGe3
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  18. Syntheses and crystal structures of the manganese hydroxide halides Mn5(OH)6Cl4, Mn5(OH)7I3, and Mn7(OH)10I4
  19. Site-preferential copper substitution for silicon leads to Cu-chains in the new ternary silicide Ir4−xCuSi2
  20. Syntheses and crystal structures of solvate complexes of alkaline earth and lanthanoid metal iodides with N,N-dimethylformamide
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