Europium acetylacetonate

Europium acetylacetonate^[1]
Names

IUPAC name europium(3+); (Z)-4-oxopent-2-en-2-olate
Identifiers
CAS Number	14284-86-7 anhydrous 52081-76-2 dihydrate
3D model (JSmol)	Interactive image
ECHA InfoCard	100.034.698
EC Number	238-185-7
PubChem CID	14455607
UNII	X5US2R5ZCX^Y
InChI InChI=1S/3C5H7O2.Eu/c31-4(6)3-5(2)7;/h33H,1-2H3;/q3*-1;+3 Key: YMTKZYSHNNXTIJ-UHFFFAOYSA-N
SMILES CC(=CC(=O)C)[O-].CC(=CC(=O)C)[O-].CC(=CC(=O)C)[O-].[Eu+3]
Properties
Chemical formula	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). Infobox references

Chemical compound

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

^ Europium acetylacetonate at American Elements
^ 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. doi:10.1016/j.jphotochem.2019.03.036. S2CID 133383294.
^ Okawara, Toru; Ishihama, Kohei; Takehara, Kenji (2014). "Redetermination of diaquatris(4-oxopent-2-en-2-olato-κ² O , O ′)lanthanum(III)". Acta Crystallographica Section E. 70 (7): m258–m259. doi:10.1107/S1600536814013336. PMC 4120584. PMID 25161523.
^ 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.
^ 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.
^ 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.
^ 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. doi:10.1021/ja01849a053.
^ 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.