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LaMg6Ga6S16: a chemical stable divalent lanthanide chalcogenide

Author

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  • Yujie Zhang

    (Tianjin University of Technology)

  • Jiale Chen

    (Tianjin University of Technology)

  • Kaixuan Li

    (Tianjin University of Technology)

  • Hongping Wu

    (Tianjin University of Technology)

  • Zhanggui Hu

    (Tianjin University of Technology)

  • Jiyang Wang

    (Tianjin University of Technology)

  • Yicheng Wu

    (Tianjin University of Technology)

  • Hongwei Yu

    (Tianjin University of Technology)

Abstract

Divalent lanthanide inorganic compounds can exhibit unique electronic configurations and physicochemical properties, yet their synthesis remains a great challenge because of the weak chemical stability. To the best of our knowledge, although several lanthanide monoxides epitaxial thin films have been reported, there is no chemically stable crystalline divalent lanthanide chalcogenide synthesized up to now. Herein, by using octahedra coupling tetrahedra single/double chains to construct an octahedral crystal field, we synthesized the stable crystalline La(II)-chalcogenide, LaMg6Ga6S16. The nature of the divalent La2+ cations can be identified by X-ray photoelectron spectroscopy, X-ray absorption near-edge structure and electron paramagnetic resonance, while the stability is confirmed by the differential thermal scanning, in-situ variable-temperature powder X-ray diffraction and a series of solid-state reactions. Owing to the particular electronic characteristics of La2+(5d1), LaMg6Ga6S16 displays an ultrabroad-band green emission at 500 nm, which is the inaugural instance of La(II)-based compounds demonstrating luminescent properties. Furthermore, as LaMg6Ga6S16 crystallizes in the non-centrosymmetric space group, P−6, it is the second-harmonic generation (SHG) active, possessing a comparable SHG response with classical AgGaS2. In consideration of its wider band gap (Eg = 3.0 eV) and higher laser-induced damage threshold (5×AgGaS2), LaMg6Ga6S16 is also a promising nonlinear optical material.

Suggested Citation

  • Yujie Zhang & Jiale Chen & Kaixuan Li & Hongping Wu & Zhanggui Hu & Jiyang Wang & Yicheng Wu & Hongwei Yu, 2024. "LaMg6Ga6S16: a chemical stable divalent lanthanide chalcogenide," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
  • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-47209-4
    DOI: 10.1038/s41467-024-47209-4
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    References listed on IDEAS

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    1. Xin Yuan & Xiaoling Wu & Jun Xiong & Binhang Yan & Ruichen Gao & Shuli Liu & Minhua Zong & Jun Ge & Wenyong Lou, 2023. "Hydrolase mimic via second coordination sphere engineering in metal-organic frameworks for environmental remediation," Nature Communications, Nature, vol. 14(1), pages 1-13, December.
    2. Xiaowei Guo & Erhong Song & Wei Zhao & Shumao Xu & Wenli Zhao & Yongjiu Lei & Yuqiang Fang & Jianjun Liu & Fuqiang Huang, 2022. "Charge self-regulation in 1T'''-MoS2 structure with rich S vacancies for enhanced hydrogen evolution activity," Nature Communications, Nature, vol. 13(1), pages 1-9, December.
    3. Jianwei Qiao & Guojun Zhou & Yayun Zhou & Qinyuan Zhang & Zhiguo Xia, 2019. "Divalent europium-doped near-infrared-emitting phosphor for light-emitting diodes," Nature Communications, Nature, vol. 10(1), pages 1-7, December.
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