Dysprosium(III) oxalate

Chemical compound Dy2(C2O4)3 From Wikipedia, the free encyclopedia

Dysprosium(III) oxalate is an inorganic compound with the chemical formula Dy2(C2O4)3. It forms hydrates, with the decahydrate Dy2(C2O4)3·10H2O being commonly encountered.[1] The anhydrous form is amorphous and unstable, decomposing to dysprosium(III) oxide at 610°C.[2] It is insoluble in water.[3]

Quick facts Names, Identifiers ...
Dysprosium(III) oxalate
Names
IUPAC name
Dysprosium(III) oxalate
Other names
  • Didysprosium trioxalate
  • Dysprosium sesquioxalate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.011.604 Edit this at Wikidata
EC Number
  • 212-763-9
  • decahydrate: 677-838-4
  • InChI=1S/3C2H2O4.2Dy/c3*3-1(4)2(5)6;;/h3*(H,3,4)(H,5,6);;/q;;;2*+3/p-6
    Key: KACTUDRDWYCYMT-UHFFFAOYSA-H
  • decahydrate: InChI=1S/3C2H2O4.2Dy.10H2O/c3*3-1(4)2(5)6;;;;;;;;;;;;/h3*(H,3,4)(H,5,6);;;10*1H2/q;;;2*+3;;;;;;;;;;/p-6
    Key: ULOOLRKTTNPQEM-UHFFFAOYSA-H
  • C(=O)(C(=O)[O-])[O-].C(=O)(C(=O)[O-])[O-].C(=O)(C(=O)[O-])[O-].[Dy+3].[Dy+3]
  • decahydrate: C(=O)(C(=O)[O-])[O-].C(=O)(C(=O)[O-])[O-].C(=O)(C(=O)[O-])[O-].O.O.O.O.O.O.O.O.O.O.[Dy+3].[Dy+3]
Properties
Dy2(C2O4)3
Molar mass 589.06 g/mol
Appearance white powder
Melting point 40 °C (104 °F; 313 K) (decahydrate)
Hazards
GHS labelling:
GHS07: Exclamation mark
Warning
H302, H312
P264, P270, P280, P301+P317, P302+P352, P317, P321, P330, P362+P364, P501
Related compounds
Other cations
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Preparation

Dysprosium(III) oxalate, as well as other lanthanide oxalates, can be prepared through "homogeneous precipitation induced by acid-catalyzed oxamic acid hydrolysis".[4] Dysprosium(III) nitrate in dilute nitric acid is mixed with an excess of oxamic acid and the mixture is heated at 40°C until all oxamic acid dissolves.[4] The temperature is then raised to 85°C and the solution is left for 7 hours, causing large crystals of dysprosium(III) oxalate to form as the oxalic acid is slowly generated.[4]

Uses

Phosphor materials

Under 364 nm UV light, dysprosium oxalate nanocrystals emit blue (480 nm), yellow (572 nm) and red (655 nm) light.[5] As a result, they are suitable for white light emitting diodes (WLEDs) and offer advantages such as high luminescence efficiency, color repeatability, and low manufacturing cost over other technologies utilizing multiple components to achieve white light.[5] They can be prepared by microwave-assisted co-precipitation using dysprosium nitrate hexahydrate, oxalic acid dihydrate, and ethylene glycol.[5]

Metal organic frameworks

See also: Single-molecule magnet

Several dysprosium oxalate metal organic frameworks (MOFs) have been synthesized.[6] For example, the nine-coordinated 2D compound [Dy(C2O4)1.5(H2O)3]n·2nH2O can be prepared through a hydrothermal reaction of sodium oxalate and dysprosium(III) perchlorate hexahydrate.[6] In addition, the 3D compound {[Dy(C2O4)1.5phen]·0.5H2O}n can be prepared through a hydrothermal reaction involving dysprosium(III) nitrate pentahydrate, oxalic acid, and phen (1,10-Phenanthroline).[7] These dysprosium-based MOFs are of research interest in the field of single-molecule magnets (SMMs).[7]

References

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