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Peer-reviewedCC BY 4.0Chemistry (Weinheim an Der Bergstrasse, Germany)

Europium Doped Atomically Precise Bismuth Oxido Nanoclusters as Molecular Building Blocks for Photoluminescent Hybrid Materials

  • Rico Thomas1
  • Senthil Kumar Kuppusamy2
  • Tobias Rüffer3
  • Marcus Weber1,4
  • Mario Ruben2,5,6
  • Michael Mehring1,4
6 affiliations
  1. 1Faculty of Natural Sciences, Institute of Chemistry, Coordination Chemistry Chemnitz University of Technology Chemnitz Germany
  2. 2Karlsruhe Institute of Technology (KIT), Institute for Quantum Materials and Technologies (IQMT) Karlsruhe Germany
  3. 3Faculty of Natural Sciences Institute of Chemistry, Inorganic Chemistry Chemnitz University of Technology Chemnitz Germany
  4. 4Center of Materials Architectures and Integration of Nanomembranes Chemnitz University of Technology Chemnitz Germany
  5. 5Karlsruhe Institute of Technology (KIT) Institute of Nanotechnology (INT) Karlsruhe Germany
  6. 6Centre Européen de Sciences Quantiques (CESQ) Institut De Science et D'ingénierie Supramoléculaires (ISIS) Strasbourg France
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Abstract

Structural and optical characterization of Eu3+ doped atomically precise bismuth oxido nanoclusters (BiO‐NCs) of about 2 nm in size is reported. The BiO‐NC [Bi38O45(NO3)24(dmso)28]:Eu (C‐1D:Eu) is transformed into soluble methacrylate (−OMc) coordinated [Bi38O45(OMc)24(dmso)4]:Eu·4dmso·4H2O (C‐2D:Eu) and [Bi38O45(OMc)24(EtOH)10]:Eu·4EtOH (C‐2E:Eu) by ligand exchange and without changing the amount of Eu3+ doping (ω ≈ 1%). Based on SC XRD analysis of C‐1D:Eu and C‐2E:Eu partial substitution of the bismuth atoms with preference in the inner {Bi6O9} core of the {Bi38O45} cluster is suggested. Temperature dependent photoluminescence studies show bismuth‐ and europium‐based dual emission at low temperatures, whereas only the latter is preserved at room temperature. As a result of the low‐symmetry environment of Eu3+ a remarkable intensity of the 5D0→7F0 (electric dipole) transition is observed, accompanied by lifetimes of about 2 ms and quantum yields ranging from 53% (C‐2D:Eu) to 65 % (C‐1D:Eu). The solubility of C‐2E:Eu enables its use for the synthesis of organic–inorganic hybrid materials. Thus, transparent hybrid materials were prepared by radical copolymerization of methyl methacrylate, 2‐hydroxyethyl methacrylate and C‐2E:Eu, showing distinct photoluminescence characteristics even with a low Eu3+ content of 2.7·10−5 mol%.

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Cite

BibTeXRIS
BibTeX
@article{thomas2026europium,
  title = {{Europium Doped Atomically Precise Bismuth Oxido Nanoclusters as Molecular Building Blocks for Photoluminescent Hybrid Materials}},
  author = {Rico Thomas and Senthil Kumar Kuppusamy and Tobias Rüffer and Marcus Weber and Mario Ruben and Michael Mehring},
  journal = {Chemistry (Weinheim an Der Bergstrasse, Germany)},
  year = {2026},
  month = aug,
  doi = {10.1002/chem.71580},
  url = {https://doi.org/10.1002/chem.71580},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - Europium Doped Atomically Precise Bismuth Oxido Nanoclusters as Molecular Building Blocks for Photoluminescent Hybrid Materials
AU  - Rico Thomas
AU  - Senthil Kumar Kuppusamy
AU  - Tobias Rüffer
AU  - Marcus Weber
AU  - Mario Ruben
AU  - Michael Mehring
PY  - 2026
DA  - 2026/08/17
JO  - Chemistry (Weinheim an Der Bergstrasse, Germany)
DO  - 10.1002/chem.71580
UR  - https://doi.org/10.1002/chem.71580
AB  - Structural and optical characterization of Eu3+ doped atomically precise bismuth oxido nanoclusters (BiO‐NCs) of about 2 nm in size is reported. The BiO‐NC [Bi38O45(NO3)24(dmso)28]:Eu (C‐1D:Eu) is transformed into soluble methacrylate (−OMc) coordinated [Bi38O45(OMc)24(dmso)4]:Eu·4dmso·4H2O (C‐2D:Eu) and [Bi38O45(OMc)24(EtOH)10]:Eu·4EtOH (C‐2E:Eu) by ligand exchange and without changing the amount of Eu3+ doping (ω ≈ 1%). Based on SC XRD analysis of C‐1D:Eu and C‐2E:Eu partial substitution of the bismuth atoms with preference in the inner {Bi6O9} core of the {Bi38O45} cluster is suggested. Temperature dependent photoluminescence studies show bismuth‐ and europium‐based dual emission at low temperatures, whereas only the latter is preserved at room temperature. As a result of the low‐symmetry environment of Eu3+ a remarkable intensity of the 5D0→7F0 (electric dipole) transition is observed, accompanied by lifetimes of about 2 ms and quantum yields ranging from 53% (C‐2D:Eu) to 65 % (C‐1D:Eu). The solubility of C‐2E:Eu enables its use for the synthesis of organic–inorganic hybrid materials. Thus, transparent hybrid materials were prepared by radical copolymerization of methyl methacrylate, 2‐hydroxyethyl methacrylate and C‐2E:Eu, showing distinct photoluminescence characteristics even with a low Eu3+ content of 2.7·10−5 mol%.
SN  - 0947-6539
SN  - 1521-3765
ER  -