Discovery of an Environmentally Friendly Water-Soluble Luminous Material with Interstitial Site Occupancy

Jinyu Wang, Tianchun Lang, Shuangqiang Fang, Tao Han, Mingsheng Cai, Mingguang Wang, Shixiu Cao, Lingling Peng, Bitao Liu, Elena F. Polisadova, Aleksey N. Yakovlev

Research output: Contribution to journalArticlepeer-review

Abstract

As an essential precursor, K2MnF6 plays an important role in the preparation of Mn4+-activated fluoride materials, but its deterioration in pure water hampers development of a green route. Herein, we report a simple and high-speed synthetic route to obtain an environmentally friendly water-soluble KHF2:Mn4+ luminous material by engineering the interstitial Mn4+ site, which is confirmed by combining with DFT, XRD Rietveld refinement data, solid-state NMR, Raman spectrum, and TG/DSC curves. Meanwhile, KHF2:Mn4+ has red emissions centered at ∼602.2, 611.2, 615.6, 633.2, 637.2, and 650.0 nm, shows a zero-thermal-quenching characteristic and good quantum efficiency of 65%. KHF2:Mn4+, and as a green ion-exchange luminous material can be dissolved into pure water to produce anionic [MnF6]2- complexes for preparing Mn4+-activated fluoride phosphors such as K2GeF6, K2SiF6, K2TiF6, etc. This discovery reveals KHF2:Mn4+ is a potential candidate to substitute K2MnF6 to develop a green route for Mn4+-activated fluoride inorganic luminescent materials.

Original languageEnglish
JournalACS Sustainable Chemistry and Engineering
DOIs
Publication statusAccepted/In press - 2021

Keywords

  • Environmentally friendly luminous material
  • Interstitial site occupancy
  • Photoluminescence Mn

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Renewable Energy, Sustainability and the Environment

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