Трис (ацетилацетонато) европий

Description

Tris(acetylacetonato)europium, Eu(acac)3, is a β-diketonate complex of europium(III) with the composition Eu(C5H7O2)3. Some sources indicate that the commercial form corresponds to Eu(C5H7O2)3(H2O)2 dihydrate. When heated in a vacuum, the complex transforms into the Eu4O(C5H7O2)10 oxocluster—the same transformation is known for related lanthanide acetylacetonates.

Basic Attributes

• CAS No: 14284-86-7
• Chemical formula: C15H21EuO6
• Molecular weight: 449.29
• Exact weight: 450.055
• EU number: 238-185-7
• PSA: 102.42
• XLogP3: 1.1061

Physical properties

• Melting point: 187–189 °C
• Boiling point: 187.6 °C at 760 mm Hg. Art.
• Flash point: 71.9 °C
• Solubility: soluble in organic solvents, in particular ethanol and acetone; less soluble in water

Optical properties and applications

Photoluminescence lines lie near 465 nm (blue), 525 nm (green) and 579 nm (yellow); the lines are unusually narrow, especially the yellow doublet. Hence the directions of use:

• doping of polymers: the introduction of polyacrylate and polycarbonate into mixtures enhances photoluminescence in the ultraviolet region
• luminescent materials and phosphors, developments for LEDs and lasers
• Europium acetylacetonate derivatives and related lanthanide reagents are used as shift reagents in NMR: europium's 4f electrons provide a paramagnetic contribution, and coordination with the substrate shifts signals and separates overlapping lines in inferring structure and stereochemistry
• starting compound for the synthesis of other europium complexes

Safety Information

• Hazard class code: 36/37/38
• Safety instructions: 26-36/37/39

Codes 36/37/38 indicate irritation to the eyes, respiratory tract and skin.

Storage and handling

Keep the container tightly closed and protect the powder from moisture. Hang without dust, use gloves, safety glasses and respiratory protection. In case of contact with eyes, rinse immediately with plenty of water and consult a doctor.