Europium acetylacetonate

Last updated
Europium acetylacetonate [1]
Eu(acac)3(H2O)2.svg
Names
IUPAC name
Tris(acetylacetonato)europium(III)
Systematic IUPAC name
Tris[(Z)-4-oxopent-2-en-2-olato-κ2O,O′]europium(III)
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.034.698 OOjs UI icon edit-ltr-progressive.svg
EC Number
  • 238-185-7
PubChem CID
UNII
  • InChI=1S/3C5H7O2.Eu/c3*1-4(6)3-5(2)7;/h3*3H,1-2H3;/q3*-1;+3
    Key: YMTKZYSHNNXTIJ-UHFFFAOYSA-N
  • CC(=CC(=O)C)[O-].CC(=CC(=O)C)[O-].CC(=CC(=O)C)[O-].[Eu+3]
Properties
C15H21EuO6
Molar mass 449.291 g·mol−1
Melting point 187 to 189 °C (369 to 372 °F; 460 to 462 K) (decomposes)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Europium acetylacetonate is a coordination complex with formula Eu(C5H7O2)3. Although this anhydrous acetylacetonate complex is widely discussed, [2] some sources suggest that it is really the dihydrate Eu(C5H7O2)3(H2O)2. [3] [4]

Upon attempted dehydration by heating under vacuum, the dihydrate converts to the oxo-cluster Eu4O(C5H7O2)10. This behavior is also observed for gadolinium acetylacetonate, yttrium acetylacetonate, lanthanum acetylacetonate, and erbium acetylacetonate. [5]

The electronic structure of the Eu3+
 core gives the complex an unusual charge-transfer band absent in other lanthanide acetylacetonates. [6] The photoluminescent emission lines occur near 465 (blue), 525 (green), and 579 nm (yellow), and are unusually sharp, especially the yellow doublet. [7] Doping a blend of polyacrylate and polycarbonate with europium acetylacetonate enhances photoluminescence over a broad range of ultraviolet wavelengths. [8] EuFOD is a substituted derivative.

References

  1. ↑ Europium acetylacetonate at American Elements
  2. ↑ Ilmi, Rashid; Kansız, Sevgi; Dege, Necmi; Khan, Muhammad S. (2019). "Synthesis, structure, Hirshfeld surface analysis and photophysical studies of red emitting europium acetylacetonate complex incorporating a phenanthroline derivative". Journal of Photochemistry and Photobiology A: Chemistry. 377: 268–281. Bibcode:2019JPPA..377..268I. doi:10.1016/j.jphotochem.2019.03.036. S2CID   133383294.
  3. ↑ Okawara, Toru; Ishihama, Kohei; Takehara, Kenji (2014). "Redetermination of diaquatris(4-oxopent-2-en-2-olato-κ2O , O ′)lanthanum(III)". Acta Crystallographica Section E. 70 (7): m258 –m259. doi:10.1107/S1600536814013336. PMC   4120584 . PMID   25161523.
  4. ↑ Phillips, Theodore; Sands, Donald E.; Wagner, William F. (1968). "Crystal and Molecular Structure of Diaquotris(acetylacetonato)lanthanum(III)". Inorganic Chemistry. 7 (11): 2295–2299. doi:10.1021/ic50069a024.
  5. ↑ Tamang, Sem Raj; Singh, Arpita; Bedi, Deepika; Bazkiaei, Adineh Rezaei; Warner, Audrey A.; Glogau, Keeley; McDonald, Corey; Unruh, Daniel K.; Findlater, Michael (2020). "Polynuclear Lanthanide–Diketonato Clusters for the Catalytic Hydroboration of Carboxamides and Esters". Nat. Catal. 3 (2): 154–162. doi:10.1038/s41929-019-0405-5. S2CID   209897045.
  6. ↑ Napier, G.D.R.; Neilson, J.D.; Shepherd, T.M. (March 1975). "Charge-transfer excited state in tris(acetylacetonato) europium(III)". Chemical Physics Letters. 31 (2): 328–330. Bibcode:1975CPL....31..328N. doi:10.1016/0009-2614(75)85032-9.
  7. ↑ Freed, Simon; Weissman, S. I.; Fortess, Fred E. (April 1941). "The Absorption Spectra of Ions of Europium and the Electric Fields within Some Coördination Compounds" . Journal of the American Chemical Society. 63 (4): 1079–1085. Bibcode:1941JAChS..63.1079F. doi:10.1021/ja01849a053.
  8. ↑ Bonzanini, R.; Dias, D.T.; Girotto, E.M.; Muniz, E.C.; Baesso, M.L.; Caiut, J.M.A.; Messaddeq, Y.; Ribeiro, S.J.L.; Bento, A.C.; Rubira, A.F. (March 2006). "Spectroscopic properties of polycarbonate and poly(methyl methacrylate) blends doped with europium (III) acetylacetonate". Journal of Luminescence. 117 (1): 61–67. Bibcode:2006JLum..117...61B. doi:10.1016/j.jlumin.2005.04.010.
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