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Selective separation of light rare-earth elements by supramolecular encapsulation and precipitation

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  • Joseph G. O’Connell-Danes

    (University of Edinburgh)

  • Bryne T. Ngwenya

    (University of Edinburgh)

  • Carole A. Morrison

    (University of Edinburgh)

  • Jason B. Love

    (University of Edinburgh)

Abstract

Supramolecular chemical strategies for Rare Earth (RE) element separations are emerging which amplify the small changes in properties across the series to bias selectivity in extraction or precipitation. These advances are important as the REs are crucial to modern technologies yet their extraction, separation, and recycling using conventional techniques remain challenging. We report here a pre-organised triamidoarene platform which, under acidic, biphasic conditions, uniquely and selectively precipitates light RE nitratometalates as supramolecular capsules. The capsules exhibit both intra- and intermolecular hydrogen bonds that dictate selectivity, promote precipitation, and facilitate the straightforward release of the RE and recycling of the receptor. This work provides a self-assembly route to metal separations that exploits size and shape complementarity and has the potential to integrate into conventional processes due to its compatibility with acidic metal feed streams.

Suggested Citation

  • Joseph G. O’Connell-Danes & Bryne T. Ngwenya & Carole A. Morrison & Jason B. Love, 2022. "Selective separation of light rare-earth elements by supramolecular encapsulation and precipitation," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-32178-3
    DOI: 10.1038/s41467-022-32178-3
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    References listed on IDEAS

    as
    1. Luke M. M. Kinsman & Bryne T. Ngwenya & Carole A. Morrison & Jason B. Love, 2021. "Tuneable separation of gold by selective precipitation using a simple and recyclable diamide," Nature Communications, Nature, vol. 12(1), pages 1-8, December.
    2. Xiao-Zhen Li & Li-Peng Zhou & Liang-Liang Yan & Ya-Min Dong & Zhuan-Ling Bai & Xiao-Qi Sun & Juan Diwu & Shuao Wang & Jean-Claude Bünzli & Qing-Fu Sun, 2018. "A supramolecular lanthanide separation approach based on multivalent cooperative enhancement of metal ion selectivity," Nature Communications, Nature, vol. 9(1), pages 1-10, December.
    3. David S. Sholl & Ryan P. Lively, 2016. "Seven chemical separations to change the world," Nature, Nature, vol. 532(7600), pages 435-437, April.
    4. Opare, Emmanuel Ohene & Struhs, Ethan & Mirkouei, Amin, 2021. "A comparative state-of-technology review and future directions for rare earth element separation," Renewable and Sustainable Energy Reviews, Elsevier, vol. 143(C).
    5. Xuemiao Yin & Yaxing Wang & Xiaojing Bai & Yumin Wang & Lanhua Chen & Chengliang Xiao & Juan Diwu & Shiyu Du & Zhifang Chai & Thomas E. Albrecht-Schmitt & Shuao Wang, 2017. "Rare earth separations by selective borate crystallization," Nature Communications, Nature, vol. 8(1), pages 1-8, April.
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    1. Huang Wu & Yu Wang & Chun Tang & Leighton O. Jones & Bo Song & Xiao-Yang Chen & Long Zhang & Yong Wu & Charlotte L. Stern & George C. Schatz & Wenqi Liu & J. Fraser Stoddart, 2023. "High-efficiency gold recovery by additive-induced supramolecular polymerization of β-cyclodextrin," Nature Communications, Nature, vol. 14(1), pages 1-11, December.

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