Europium acetylacetonate
3(H2O)2.svg)
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| Names | |
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| IUPAC name
europium(3+); (Z)-4-oxopent-2-en-2-olate
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| Identifiers | |
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3D model (JSmol)
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| ECHA InfoCard | 100.034.698 |
| EC Number |
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PubChem CID
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| UNII | |
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| 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).
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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
[edit]- ^ 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.