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Quenching of the Eu 3+ Luminescence by Cu 2+ Ions in the Nanosized Hydroxyapatite Designed for Future Bio-Detection.

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Title: Quenching of the Eu 3+ Luminescence by Cu 2+ Ions in the Nanosized Hydroxyapatite Designed for Future Bio-Detection.
Authors: Szyszka, Katarzyna1 (AUTHOR) k.szyszka@intibs.pl, Targońska, Sara1 (AUTHOR) a.watras@intibs.pl, Lewińska, Agnieszka2 (AUTHOR) agnieszka.lewinska@chem.uni.wroc.pl, Watras, Adam1 (AUTHOR), Wiglusz, Rafal J.1,3 (AUTHOR) k.szyszka@intibs.pl, Chen, Jiangshan (AUTHOR)
Source: Nanomaterials (2079-4991). Feb2021, Vol. 11 Issue 2, p464-464. 1p.
Subjects: Luminescence, Electron microscope techniques, Electron paramagnetic resonance, X-ray powder diffraction, Luminescence quenching, Hydroxyapatite, Electron paramagnetic resonance spectroscopy
Abstract: The hydroxyapatite nanopowders of the Eu3+-doped, Cu2+-doped, and Eu3+/Cu2+-co-doped Ca10(PO4)6(OH)2 were prepared by a microwave-assisted hydrothermal method. The structural and morphological properties of the products were investigated by X-ray powder diffraction (XRD), transmission electron microscopy techniques (TEM), and infrared spectroscopy (FT-IR). The average crystal size and the unit cell parameters were calculated by a Rietveld refinement tool. The absorption, emission excitation, emission, and luminescence decay time were recorded and studied in detail. The 5D0 → 7F2 transition is the most intense transition. The Eu3+ ions occupied two independent crystallographic sites in these materials exhibited in emission spectra: one Ca(1) site with C3 symmetry and one Ca(2) sites with Cs symmetry. The Eu3+ emission is strongly quenched by Cu2+ ions, and the luminescence decay time is much shorter in the case of Eu3+/Cu2+ co-doped materials than in Eu3+-doped materials. The luminescence quenching mechanism as well as the schematic energy level diagram showing the Eu3+ emission quenching mechanism using Cu2+ ions are proposed. The electron paramagnetic resonance (EPR) technique revealed the existence of at least two different coordination environments for copper(II) ion. [ABSTRACT FROM AUTHOR]
Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Quenching of the Eu 3+ Luminescence by Cu 2+ Ions in the Nanosized Hydroxyapatite Designed for Future Bio-Detection.
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  Data: <searchLink fieldCode="AR" term="%22Szyszka%2C+Katarzyna%22">Szyszka, Katarzyna</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> k.szyszka@intibs.pl</i><br /><searchLink fieldCode="AR" term="%22Targońska%2C+Sara%22">Targońska, Sara</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> a.watras@intibs.pl</i><br /><searchLink fieldCode="AR" term="%22Lewińska%2C+Agnieszka%22">Lewińska, Agnieszka</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> agnieszka.lewinska@chem.uni.wroc.pl</i><br /><searchLink fieldCode="AR" term="%22Watras%2C+Adam%22">Watras, Adam</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wiglusz%2C+Rafal+J%2E%22">Wiglusz, Rafal J.</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<i> k.szyszka@intibs.pl</i><br /><searchLink fieldCode="AR" term="%22Chen%2C+Jiangshan%22">Chen, Jiangshan</searchLink> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Nanomaterials+%282079-4991%29%22">Nanomaterials (2079-4991)</searchLink>. Feb2021, Vol. 11 Issue 2, p464-464. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Luminescence%22">Luminescence</searchLink><br /><searchLink fieldCode="DE" term="%22Electron+microscope+techniques%22">Electron microscope techniques</searchLink><br /><searchLink fieldCode="DE" term="%22Electron+paramagnetic+resonance%22">Electron paramagnetic resonance</searchLink><br /><searchLink fieldCode="DE" term="%22X-ray+powder+diffraction%22">X-ray powder diffraction</searchLink><br /><searchLink fieldCode="DE" term="%22Luminescence+quenching%22">Luminescence quenching</searchLink><br /><searchLink fieldCode="DE" term="%22Hydroxyapatite%22">Hydroxyapatite</searchLink><br /><searchLink fieldCode="DE" term="%22Electron+paramagnetic+resonance+spectroscopy%22">Electron paramagnetic resonance spectroscopy</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The hydroxyapatite nanopowders of the Eu3+-doped, Cu2+-doped, and Eu3+/Cu2+-co-doped Ca10(PO4)6(OH)2 were prepared by a microwave-assisted hydrothermal method. The structural and morphological properties of the products were investigated by X-ray powder diffraction (XRD), transmission electron microscopy techniques (TEM), and infrared spectroscopy (FT-IR). The average crystal size and the unit cell parameters were calculated by a Rietveld refinement tool. The absorption, emission excitation, emission, and luminescence decay time were recorded and studied in detail. The 5D0 → 7F2 transition is the most intense transition. The Eu3+ ions occupied two independent crystallographic sites in these materials exhibited in emission spectra: one Ca(1) site with C3 symmetry and one Ca(2) sites with Cs symmetry. The Eu3+ emission is strongly quenched by Cu2+ ions, and the luminescence decay time is much shorter in the case of Eu3+/Cu2+ co-doped materials than in Eu3+-doped materials. The luminescence quenching mechanism as well as the schematic energy level diagram showing the Eu3+ emission quenching mechanism using Cu2+ ions are proposed. The electron paramagnetic resonance (EPR) technique revealed the existence of at least two different coordination environments for copper(II) ion. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.3390/nano11020464
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        Text: English
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        StartPage: 464
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      – SubjectFull: Luminescence
        Type: general
      – SubjectFull: Electron microscope techniques
        Type: general
      – SubjectFull: Electron paramagnetic resonance
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      – SubjectFull: X-ray powder diffraction
        Type: general
      – SubjectFull: Luminescence quenching
        Type: general
      – SubjectFull: Hydroxyapatite
        Type: general
      – SubjectFull: Electron paramagnetic resonance spectroscopy
        Type: general
    Titles:
      – TitleFull: Quenching of the Eu 3+ Luminescence by Cu 2+ Ions in the Nanosized Hydroxyapatite Designed for Future Bio-Detection.
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            NameFull: Szyszka, Katarzyna
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              M: 02
              Text: Feb2021
              Type: published
              Y: 2021
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