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Mild hydrothermal synthesis, crystal structure, photoluminescence properties and emission quantum yield of a new zirconium germanate with garnet-type structure

Identifieur interne : 001847 ( Main/Repository ); précédent : 001846; suivant : 001848

Mild hydrothermal synthesis, crystal structure, photoluminescence properties and emission quantum yield of a new zirconium germanate with garnet-type structure

Auteurs : RBID : Pascal:12-0302933

Descripteurs français

Pascal (Inist)
- Synthèse hydrothermale, Structure cristalline, Photoluminescence, Rendement quantique, Germanate, Sodium, Germanium, Effet pression, Valence, Compensation charge, Ion sodium, Modification chimique, Addition indium, Flexibilité, Zirconium, Grenats, Ligand, Transfert charge, Effet concentration, Trempe, Zr, Na, 6166, 7855.
Wicri :
- geographic : Valence (Drôme).
- concept : Sodium.

English descriptors

KwdEn :
- Charge compensation, Charge transfer, Chemical modification, Crystal structure, Flexibility, Garnets, Germanates, Germanium, Hydrothermal synthesis, Indium additions, Ligands, Photoluminescence, Pressure effects, Quantity ratio, Quantum yield, Quenching, Sodium, Sodium ions, Valence, Zirconium.

Abstract

The mild hydrothermal synthesis, crystal structure, photoluminescence properties and emission quantum yield of a new sodium zirconium germanate are reported. This material and the method for its preparation represent for the first time a germanium garnet-type material synthesized at autogenous pressure and temperature at 230 °C. The crystal structure was determined by starting from the crystallographic parameters of a common garnet structure and it represents not only a new chemical combination of atoms but also combination of oxidation states in garnet structure. The framework consists of interconnected corner sharing GeO₄ tetrahedra and Zr0₆ octahedra which form small cavities that accommodate charge compensation Na⁺ cations. In the course of synthesis the structure can be functionalized by in situ doping with different percentage of Eu³ ions. This structural flexibility is used to explore the photoluminescent behavior of the active centers embedded in garnet-type host. The materials display the Eu³⁺ ⁵D₀ → ⁷F_0-4 transitions under excitation via intra-⁴f₆ excitation levels and through the O^2-→Eu³⁺ ligand-to-metal charge transfer. A maximum ⁵D₀ quantum efficiency and emission quantum yield values (ca. 0.28 and 0.04±0.01, respectively) were found for the low Eu³⁺-containing sample, suggesting the presence of concentration quenching effects at higher Eu³⁺-content (5%).

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Pascal:12-0302933

Le document en format XML

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<author><name sortKey="Ferdov, Stanislav" uniqKey="Ferdov S">Stanislav Ferdov</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Physics, University of Minho</s1>
<s2>4800-058 Guimares</s2>
<s3>PRT</s3>
<sZ>1 aut.</sZ>
</inist:fA14>
<country>Portugal</country>
<wicri:noRegion>4800-058 Guimares</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Ferreira, Rute A S" uniqKey="Ferreira R">Rute A. S. Ferreira</name>
<affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Department of Physics, CICECO, University of Aveiro</s1>
<s2>3810-193 Aveiro</s2>
<s3>PRT</s3>
<sZ>2 aut.</sZ>
</inist:fA14>
<country>Portugal</country>
<wicri:noRegion>3810-193 Aveiro</wicri:noRegion>
</affiliation>
</author>
<author><name>ZHI LIN</name>
<affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Department of Chemistry, CICECO, University of Aveiro</s1>
<s2>3810-193 Aveiro</s2>
<s3>PRT</s3>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
</inist:fA14>
<country>Portugal</country>
<wicri:noRegion>3810-193 Aveiro</wicri:noRegion>
</affiliation>
</author>
<author><name>ZHENGYING WU</name>
<affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Department of Chemistry, CICECO, University of Aveiro</s1>
<s2>3810-193 Aveiro</s2>
<s3>PRT</s3>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
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<country>Portugal</country>
<wicri:noRegion>3810-193 Aveiro</wicri:noRegion>
</affiliation>
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<publicationStmt><idno type="inist">12-0302933</idno>
<date when="2012">2012</date>
<idno type="stanalyst">PASCAL 12-0302933 INIST</idno>
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<seriesStmt><idno type="ISSN">0022-4596</idno>
<title level="j" type="abbreviated">J. solid state chem. : (Print)</title>
<title level="j" type="main">Journal of solid state chemistry : (Print)</title>
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</fileDesc>
<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Charge compensation</term>
<term>Charge transfer</term>
<term>Chemical modification</term>
<term>Crystal structure</term>
<term>Flexibility</term>
<term>Garnets</term>
<term>Germanates</term>
<term>Germanium</term>
<term>Hydrothermal synthesis</term>
<term>Indium additions</term>
<term>Ligands</term>
<term>Photoluminescence</term>
<term>Pressure effects</term>
<term>Quantity ratio</term>
<term>Quantum yield</term>
<term>Quenching</term>
<term>Sodium</term>
<term>Sodium ions</term>
<term>Valence</term>
<term>Zirconium</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Synthèse hydrothermale</term>
<term>Structure cristalline</term>
<term>Photoluminescence</term>
<term>Rendement quantique</term>
<term>Germanate</term>
<term>Sodium</term>
<term>Germanium</term>
<term>Effet pression</term>
<term>Valence</term>
<term>Compensation charge</term>
<term>Ion sodium</term>
<term>Modification chimique</term>
<term>Addition indium</term>
<term>Flexibilité</term>
<term>Zirconium</term>
<term>Grenats</term>
<term>Ligand</term>
<term>Transfert charge</term>
<term>Effet concentration</term>
<term>Trempe</term>
<term>Zr</term>
<term>Na</term>
<term>6166</term>
<term>7855</term>
</keywords>
<keywords scheme="Wicri" type="geographic" xml:lang="fr"><term>Valence (Drôme)</term>
</keywords>
<keywords scheme="Wicri" type="concept" xml:lang="fr"><term>Sodium</term>
</keywords>
</textClass>
</profileDesc>
</teiHeader>
<front><div type="abstract" xml:lang="en">The mild hydrothermal synthesis, crystal structure, photoluminescence properties and emission quantum yield of a new sodium zirconium germanate are reported. This material and the method for its preparation represent for the first time a germanium garnet-type material synthesized at autogenous pressure and temperature at 230 °C. The crystal structure was determined by starting from the crystallographic parameters of a common garnet structure and it represents not only a new chemical combination of atoms but also combination of oxidation states in garnet structure. The framework consists of interconnected corner sharing GeO<sub>4</sub>
 tetrahedra and Zr0<sub>6</sub>
 octahedra which form small cavities that accommodate charge compensation Na<sup>+</sup>
 cations. In the course of synthesis the structure can be functionalized by in situ doping with different percentage of Eu<sup>3</sup>
 ions. This structural flexibility is used to explore the photoluminescent behavior of the active centers embedded in garnet-type host. The materials display the Eu<sup>3+</sup>
 <sup>5</sup>
D<sub>0</sub>
 → <sup>7</sup>
F<sub>0-4</sub>
 transitions under excitation via intra-<sup>4</sup>
f<sub>6</sub>
 excitation levels and through the O<sup>2-</sup>
→Eu<sup>3+</sup>
 ligand-to-metal charge transfer. A maximum <sup>5</sup>
D<sub>0</sub>
 quantum efficiency and emission quantum yield values (ca. 0.28 and 0.04±0.01, respectively) were found for the low Eu<sup>3+</sup>
-containing sample, suggesting the presence of concentration quenching effects at higher Eu<sup>3+</sup>
-content (5%).</div>
</front>
</TEI>
<inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0022-4596</s0>
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<fA02 i1="01"><s0>JSSCBI</s0>
</fA02>
<fA03 i2="1"><s0>J. solid state chem. : (Print)</s0>
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<fA05><s2>190</s2>
</fA05>
<fA08 i1="01" i2="1" l="ENG"><s1>Mild hydrothermal synthesis, crystal structure, photoluminescence properties and emission quantum yield of a new zirconium germanate with garnet-type structure</s1>
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<fA11 i1="01" i2="1"><s1>FERDOV (Stanislav)</s1>
</fA11>
<fA11 i1="02" i2="1"><s1>FERREIRA (Rute A. S.)</s1>
</fA11>
<fA11 i1="03" i2="1"><s1>ZHI LIN</s1>
</fA11>
<fA11 i1="04" i2="1"><s1>ZHENGYING WU</s1>
</fA11>
<fA14 i1="01"><s1>Department of Physics, University of Minho</s1>
<s2>4800-058 Guimares</s2>
<s3>PRT</s3>
<sZ>1 aut.</sZ>
</fA14>
<fA14 i1="02"><s1>Department of Physics, CICECO, University of Aveiro</s1>
<s2>3810-193 Aveiro</s2>
<s3>PRT</s3>
<sZ>2 aut.</sZ>
</fA14>
<fA14 i1="03"><s1>Department of Chemistry, CICECO, University of Aveiro</s1>
<s2>3810-193 Aveiro</s2>
<s3>PRT</s3>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
</fA14>
<fA20><s1>18-23</s1>
</fA20>
<fA21><s1>2012</s1>
</fA21>
<fA23 i1="01"><s0>ENG</s0>
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<fA43 i1="01"><s1>INIST</s1>
<s2>14677</s2>
<s5>354000509384640040</s5>
</fA43>
<fA44><s0>0000</s0>
<s1>© 2012 INIST-CNRS. All rights reserved.</s1>
</fA44>
<fA45><s0>36 ref.</s0>
</fA45>
<fA47 i1="01" i2="1"><s0>12-0302933</s0>
</fA47>
<fA60><s1>P</s1>
</fA60>
<fA61><s0>A</s0>
</fA61>
<fA64 i1="01" i2="1"><s0>Journal of solid state chemistry : (Print)</s0>
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<fA66 i1="01"><s0>USA</s0>
</fA66>
<fC01 i1="01" l="ENG"><s0>The mild hydrothermal synthesis, crystal structure, photoluminescence properties and emission quantum yield of a new sodium zirconium germanate are reported. This material and the method for its preparation represent for the first time a germanium garnet-type material synthesized at autogenous pressure and temperature at 230 °C. The crystal structure was determined by starting from the crystallographic parameters of a common garnet structure and it represents not only a new chemical combination of atoms but also combination of oxidation states in garnet structure. The framework consists of interconnected corner sharing GeO<sub>4</sub>
 tetrahedra and Zr0<sub>6</sub>
 octahedra which form small cavities that accommodate charge compensation Na<sup>+</sup>
 cations. In the course of synthesis the structure can be functionalized by in situ doping with different percentage of Eu<sup>3</sup>
 ions. This structural flexibility is used to explore the photoluminescent behavior of the active centers embedded in garnet-type host. The materials display the Eu<sup>3+</sup>
 <sup>5</sup>
D<sub>0</sub>
 → <sup>7</sup>
F<sub>0-4</sub>
 transitions under excitation via intra-<sup>4</sup>
f<sub>6</sub>
 excitation levels and through the O<sup>2-</sup>
→Eu<sup>3+</sup>
 ligand-to-metal charge transfer. A maximum <sup>5</sup>
D<sub>0</sub>
 quantum efficiency and emission quantum yield values (ca. 0.28 and 0.04±0.01, respectively) were found for the low Eu<sup>3+</sup>
-containing sample, suggesting the presence of concentration quenching effects at higher Eu<sup>3+</sup>
-content (5%).</s0>
</fC01>
<fC02 i1="01" i2="3"><s0>001B60A66</s0>
</fC02>
<fC02 i1="02" i2="3"><s0>001B70H55</s0>
</fC02>
<fC03 i1="01" i2="3" l="FRE"><s0>Synthèse hydrothermale</s0>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="3" l="ENG"><s0>Hydrothermal synthesis</s0>
<s5>01</s5>
</fC03>
<fC03 i1="02" i2="3" l="FRE"><s0>Structure cristalline</s0>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="3" l="ENG"><s0>Crystal structure</s0>
<s5>02</s5>
</fC03>
<fC03 i1="03" i2="3" l="FRE"><s0>Photoluminescence</s0>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="3" l="ENG"><s0>Photoluminescence</s0>
<s5>03</s5>
</fC03>
<fC03 i1="04" i2="3" l="FRE"><s0>Rendement quantique</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="3" l="ENG"><s0>Quantum yield</s0>
<s5>04</s5>
</fC03>
<fC03 i1="05" i2="3" l="FRE"><s0>Germanate</s0>
<s2>NA</s2>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="3" l="ENG"><s0>Germanates</s0>
<s2>NA</s2>
<s5>05</s5>
</fC03>
<fC03 i1="06" i2="3" l="FRE"><s0>Sodium</s0>
<s2>NC</s2>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="3" l="ENG"><s0>Sodium</s0>
<s2>NC</s2>
<s5>06</s5>
</fC03>
<fC03 i1="07" i2="3" l="FRE"><s0>Germanium</s0>
<s2>NC</s2>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="3" l="ENG"><s0>Germanium</s0>
<s2>NC</s2>
<s5>07</s5>
</fC03>
<fC03 i1="08" i2="3" l="FRE"><s0>Effet pression</s0>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="3" l="ENG"><s0>Pressure effects</s0>
<s5>08</s5>
</fC03>
<fC03 i1="09" i2="3" l="FRE"><s0>Valence</s0>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="3" l="ENG"><s0>Valence</s0>
<s5>09</s5>
</fC03>
<fC03 i1="10" i2="3" l="FRE"><s0>Compensation charge</s0>
<s5>10</s5>
</fC03>
<fC03 i1="10" i2="3" l="ENG"><s0>Charge compensation</s0>
<s5>10</s5>
</fC03>
<fC03 i1="11" i2="3" l="FRE"><s0>Ion sodium</s0>
<s2>NC</s2>
<s5>11</s5>
</fC03>
<fC03 i1="11" i2="3" l="ENG"><s0>Sodium ions</s0>
<s2>NC</s2>
<s5>11</s5>
</fC03>
<fC03 i1="12" i2="X" l="FRE"><s0>Modification chimique</s0>
<s5>12</s5>
</fC03>
<fC03 i1="12" i2="X" l="ENG"><s0>Chemical modification</s0>
<s5>12</s5>
</fC03>
<fC03 i1="12" i2="X" l="SPA"><s0>Modificación química</s0>
<s5>12</s5>
</fC03>
<fC03 i1="13" i2="3" l="FRE"><s0>Addition indium</s0>
<s5>13</s5>
</fC03>
<fC03 i1="13" i2="3" l="ENG"><s0>Indium additions</s0>
<s5>13</s5>
</fC03>
<fC03 i1="14" i2="3" l="FRE"><s0>Flexibilité</s0>
<s5>14</s5>
</fC03>
<fC03 i1="14" i2="3" l="ENG"><s0>Flexibility</s0>
<s5>14</s5>
</fC03>
<fC03 i1="15" i2="3" l="FRE"><s0>Zirconium</s0>
<s2>NC</s2>
<s5>15</s5>
</fC03>
<fC03 i1="15" i2="3" l="ENG"><s0>Zirconium</s0>
<s2>NC</s2>
<s5>15</s5>
</fC03>
<fC03 i1="16" i2="3" l="FRE"><s0>Grenats</s0>
<s5>16</s5>
</fC03>
<fC03 i1="16" i2="3" l="ENG"><s0>Garnets</s0>
<s5>16</s5>
</fC03>
<fC03 i1="17" i2="3" l="FRE"><s0>Ligand</s0>
<s5>29</s5>
</fC03>
<fC03 i1="17" i2="3" l="ENG"><s0>Ligands</s0>
<s5>29</s5>
</fC03>
<fC03 i1="18" i2="X" l="FRE"><s0>Transfert charge</s0>
<s5>30</s5>
</fC03>
<fC03 i1="18" i2="X" l="ENG"><s0>Charge transfer</s0>
<s5>30</s5>
</fC03>
<fC03 i1="18" i2="X" l="SPA"><s0>Transferencia carga</s0>
<s5>30</s5>
</fC03>
<fC03 i1="19" i2="3" l="FRE"><s0>Effet concentration</s0>
<s5>31</s5>
</fC03>
<fC03 i1="19" i2="3" l="ENG"><s0>Quantity ratio</s0>
<s5>31</s5>
</fC03>
<fC03 i1="20" i2="3" l="FRE"><s0>Trempe</s0>
<s5>32</s5>
</fC03>
<fC03 i1="20" i2="3" l="ENG"><s0>Quenching</s0>
<s5>32</s5>
</fC03>
<fC03 i1="21" i2="3" l="FRE"><s0>Zr</s0>
<s4>INC</s4>
<s5>46</s5>
</fC03>
<fC03 i1="22" i2="3" l="FRE"><s0>Na</s0>
<s4>INC</s4>
<s5>47</s5>
</fC03>
<fC03 i1="23" i2="3" l="FRE"><s0>6166</s0>
<s4>INC</s4>
<s5>71</s5>
</fC03>
<fC03 i1="24" i2="3" l="FRE"><s0>7855</s0>
<s4>INC</s4>
<s5>72</s5>
</fC03>
<fN21><s1>233</s1>
</fN21>
<fN44 i1="01"><s1>OTO</s1>
</fN44>
<fN82><s1>OTO</s1>
</fN82>
</pA>
</standard>
</inist>
</record>

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Mild hydrothermal synthesis, crystal structure, photoluminescence properties and emission quantum yield of a new zirconium germanate with garnet-type structure

Mild hydrothermal synthesis, crystal structure, photoluminescence properties and emission quantum yield of a new zirconium germanate with garnet-type structure

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri