Europium(III) oxalate

Last updated
Europium(III) oxalate
Names
IUPAC names
Europium(III) oxalate
Other names
  • Europium oxalate
  • Europium trioxalate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.019.896 OOjs UI icon edit-ltr-progressive.svg
EC Number
  • 221-885-1
PubChem CID
  • InChI=1S/3C2H2O4.2Eu/c3*3-1(4)2(5)6;;/h3*(H,3,4)(H,5,6);;/q;;;2*+3/p-6
    Key: PVDYMOCCGHXJAK-UHFFFAOYSA-H
  • C(=O)(C(=O)[O-])[O-].C(=O)(C(=O)[O-])[O-].C(=O)(C(=O)[O-])[O-].[Eu+3].[Eu+3]
Properties
Eu2(C2O4)3
Molar mass 567.985 g·mol−1 (anhydrous)
640.046 g·mol−1 (tetrahydrate)
676.077 g·mol−1 (hexahydrate)
748.138 g·mol−1 (decahydrate)
Appearancecolourless solid [1]
1,38 mg·l−1 [2]
Hazards
GHS labelling:
GHS-pictogram-acid.svg GHS-pictogram-exclam.svg
Danger
H314, H335
P261, P280, P304+P340, P305+P351+P338, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Europium(III) oxalate (Eu2(C2O4)3) is a chemical compound of europium and oxalic acid. There are different hydrates including the decahydrate, hexahydrate and tetrahydrate. [1] Europium(II) oxalate is also known. [3]

Contents

Preparation

An excess of oxalate is added to a hot solution of Eu3+ cations. The resulting precipitate of Eu2(C2O4)3 ⋅ 10H2O is dried in a desiccator. [4]

Properties

Europium(III) oxide (Eu2O3) can be prepared by calcining europium(III) oxalate. [5]

The dehydration of Eu2(C2O4)3 · 10H2O occurs below 200 °C: [1]

The decomposition of this compound takes place in two stages, the first at 350 °C and the second at about 620 °C. [1] [6]

In the Mössbauer spectrum, Eu2(C2O4)3 · 10H2O shows an isomer shift of +0,26 mm/s with a line width of 2,38 mm/s, in reference to EuF3. [4] [7] The Debye temperature of Eu2(C2O4)3 is 166±15 K. [8]

Eu2(C2O4)3 · 10H2O crystallizes monoclinically in the space group of P21/c (space group no. 14) with the lattice parameters a = 1098, b = 961, c = 1004 pm and β = 114.2° with four formula units per unit cell. [9]

Nanoparticles show a line emission when excited by a light source of 393 nm, the transitions 5D0→7F1 (592 nm) and 5D0→7F2 (616 nm) can then be found in the spectrum. This can be used as a red phosphor for white LEDs. [10]

Related Research Articles

<span class="mw-page-title-main">Europium</span> Chemical element, symbol Eu and atomic number 63

Europium is a chemical element with the symbol Eu and atomic number 63. Europium is a silvery-white metal of the lanthanide series that reacts readily with air to form a dark oxide coating. It is the most chemically reactive, least dense, and softest of the lanthanide elements. It is soft enough to be cut with a knife. Europium was isolated in 1901 and named after the continent of Europe. Europium usually assumes the oxidation state +3, like other members of the lanthanide series, but compounds having oxidation state +2 are also common. All europium compounds with oxidation state +2 are slightly reducing. Europium has no significant biological role and is relatively non-toxic compared to other heavy metals. Most applications of europium exploit the phosphorescence of europium compounds. Europium is one of the rarest of the rare-earth elements on Earth.

<span class="mw-page-title-main">Erbium</span> Chemical element, symbol Er and atomic number 68

Erbium is a chemical element with the symbol Er and atomic number 68. A silvery-white solid metal when artificially isolated, natural erbium is always found in chemical combination with other elements. It is a lanthanide, a rare-earth element, originally found in the gadolinite mine in Ytterby, Sweden, which is the source of the element's name.

<span class="mw-page-title-main">Phosphor</span> Luminescent substance

A phosphor is a substance that exhibits the phenomenon of luminescence; it emits light when exposed to some type of radiant energy. The term is used both for fluorescent or phosphorescent substances which glow on exposure to ultraviolet or visible light, and cathodoluminescent substances which glow when struck by an electron beam in a cathode-ray tube.

<span class="mw-page-title-main">Luminol</span> Chemical compound

Luminol (C8H7N3O2) is a chemical that exhibits chemiluminescence, with a blue glow, when mixed with an appropriate oxidizing agent. Luminol is a white-to-pale-yellow crystalline solid that is soluble in most polar organic solvents, but insoluble in water.

Luminescence dating refers to a group of methods of determining how long ago mineral grains were last exposed to sunlight or sufficient heating. It is useful to geologists and archaeologists who want to know when such an event occurred. It uses various methods to stimulate and measure luminescence.

<span class="mw-page-title-main">Sodium chromate</span> Chemical compound

Sodium chromate is the inorganic compound with the formula Na2CrO4. It exists as a yellow hygroscopic solid, which can form tetra-, hexa-, and decahydrates. It is an intermediate in the extraction of chromium from its ores.

<span class="mw-page-title-main">Europium acetylacetonate</span> Chemical compound

Europium acetylacetonate is a compound with formula Eu(C5H7O2)3(H2O)2. It is a europium(III) complex with three acetylacetonate and two aquo ligands. The electronic structure of the Eu3+
 core gives the complex an unusual charge-transfer band absent in other lanthanide acetylacetonates. The photoluminescent emission lines occur near 465 (blue), 525 (green), and 579 nm (yellow), and are unusually sharp, especially the yellow doublet. Doping a blend of polyacrylate and polycarbonate with europium acetylacetonate enhances photoluminescence over a broad range of ultraviolet wavelengths. EuFOD is a substituted derivative.

<span class="mw-page-title-main">Caesium oxalate</span> Chemical compound

Caesium oxalate (standard IUPAC spelling) dicesium oxalate, or cesium oxalate (American spelling) is the oxalate of caesium. Caesium oxalate has the chemical formula of Cs2C2O4.

Europium(III) fluoride is an inorganic compound with a chemical formula EuF3.

Manganese oxalate is a chemical compound, a salt of manganese and oxalic acid with the chemical formula MnC
2O
4. The compound creates light pink crystals, does not dissolve in water, and forms crystalline hydrates. It occurs naturally as the mineral Lindbergite.

Europium phosphide is an inorganic compound of europium and phosphorus with the chemical formula EuP. Other phosphides are also known.

<span class="mw-page-title-main">Europium(II) oxide</span> Chemical compound

Europium(II) oxide (EuO) is a chemical compound which is one of the oxides of europium. In addition to europium(II) oxide, there is also europium(III) oxide and the mixed valence europium(II,III) oxide.

<span class="mw-page-title-main">Europium(III) acetate</span> Chemical compound

Europium(III) acetate is an inorganic salt of europium and acetic acid with the chemical formula of Eu(CH3COO)3. In this compound, europium exhibits the +3 oxidation state. It can exist in the anhydrous form, sesquihydrate and tetrahydrate. Its hydrate molecule is a dimer.

<span class="mw-page-title-main">Europium(II) titanate</span> Chemical compound

Europium(II) titanate is a black mixed oxide of europium and titanium. It crystallizes in the perovskite structure.

Europium(III) chromate is a chemical compound composed of europium, chromium and oxygen with europium in the +3 oxidation state, chromium in the +5 oxidation state and oxygen in the -2 oxidation state. It has the chemical formula of EuCrO4.

<span class="mw-page-title-main">Europium compounds</span> Compounds with at least one europium atom

Europium compounds are compounds formed by the lanthanide metal europium (Eu). In these compounds, europium generally exhibits the +3 oxidation state, such as EuCl3, Eu(NO3)3 and Eu(CH3COO)3. Compounds with europium in the +2 oxidation state are also known. The +2 ion of europium is the most stable divalent ion of lanthanide metals in aqueous solution. Many europium compounds fluoresce under ultraviolet light due to the excitation of electrons to higher energy levels. Lipophilic europium complexes often feature acetylacetonate-like ligands, e.g., Eufod.

Thulium(II) fluoride is one of the fluoride salts of the lanthanide metal thulium, with the chemical compound of TmF2. It can react with zirconium tetrafluoride at 900 °C to form TmZrF6, which has a hexagonal structure. In addition, low-temperature Mössbauer spectroscopy and some theoretical studies of thulium(II) fluoride have also been reported.

Europium(III) iodide is an inorganic compound containing europium and iodine with the chemical formula EuI3.

Europium monoselenide is a binary inorganic compound of europium and selenium with the chemical formula EuSe. The compound forms black crystals.

<span class="mw-page-title-main">Samarium(III) phosphate</span> Chemical compound

Samarium(III) phosphate is an inorganic compound, with the chemical formula of SmPO4. It is one of the phosphates of samarium.

References

  1. 1 2 3 4 John K. Gibson, Nathan A. Stum (1993-10-26). "Spectroscopic investigation of the thermal decomposition of europium oxalate". Thermochimica Acta . 226: 301–310. doi:10.1016/0040-6031(93)80231-X.
  2. ↑ S. S. Berdonosov, D. G. Berdonosova, M. A. Prokofev, V. Ya. Lebedev (1976). "Study of europium oxalate decahydrate". Zh. Neorg. Khim. : 1184–1189.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  3. ↑ H. Pink (1967-09-01). "Europium(II)-oxalat". Zeitschrift für Anorganische und Allgemeine Chemie . 353 (5–6): 247–249. doi:10.1002/zaac.19673530505.
  4. 1 2 Wynter, C. I.; Oliver, F. R.; Hill, Dana; Spijkerman, J. J.; Boyd-Bartlett, Y. P. (1991-08-01). "Short Communication: Mössbauer Effect 151Eu of in Europium Chelates". Radiochimica Acta. 55 (2): 111–112. doi:10.1524/ract.1991.55.2.111. S2CID   99690174.
  5. ↑ Ginya Adachi, Nobuhito Imanaka, Zhen Chuan Kang (2004). Binary rare earth oxides. Springer Netherlands. p. 138. ISBN   978-1-4020-2568-6.{{cite book}}: CS1 maint: multiple names: authors list (link)
  6. ↑ A. Glasner, E. Levy, M. Steinberg (1965). "Thermogravimetric and Differentialthermoanalyse of europium(III)oxalat and unite europium(II)salzen". Chemisches Zentralblatt (17): 05296.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  7. ↑ Wynter, C.I.; Oliver, F.W.; Davis, Alfred; Spijkerman, J.J.; Stadelmaier, H.; Wolfe, E.A. (1993). "Mössbauer effect of 151Eu in europium oxalate and fluorides". Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 76 (1–4): 352–353. Bibcode:1993NIMPB..76..352W. doi:10.1016/0168-583X(93)95235-W.
  8. ↑ C. I. Wynter, D. H. Ryan, S. P. Taneja, L. May, F. W. Oliver, D. E. Brown, M. Iwunzie (November 2005). "Mössbauer studies of 151Eu in europium oxalate,europium bissalen ammonium and europium benzoate". Hyperfine Interactions . 166 (1–4): 499–503. Bibcode:2005HyInt.166..499W. doi:10.1007/s10751-006-9315-4. S2CID   95479298.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  9. ↑ A. Dinu, Th. Kukku, J. Monu, P. R. Biju, N. V. Unnikrishnanaand, J. Cyriac (2019). "Structural and spectroscopic investigations on thequenching free luminescence of europium oxalatenanocrystals". Acta Crystallographica Section C . 75 (5): 589–597. doi:10.1107/S2053229619005059. PMID   31062717. S2CID   146808653.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  10. ↑ Wei Zhu, You-jin Zhang, Hong-mei He, Zhi-yong Fang (2011). "Synthesis and Luminescence Property of Hierarchical Europium Oxalate Micropaticles". Chinese Journal of Chemical Physics . 24 (1): 65–69. Bibcode:2011ChJCP..24...65Z. doi:10.1088/1674-0068/24/01/65-69.{{cite journal}}: CS1 maint: multiple names: authors list (link)
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