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Insoluble pi-Conjugated Polyimine as an Organic Adsorbent for Group 10 Metal Ions

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Title: Insoluble pi-Conjugated Polyimine as an Organic Adsorbent for Group 10 Metal Ions
Authors: Shirakura, Hayato Browse this author
Hijikata, Yuh Browse this author
Pirillo, Jenny Browse this author
Yoneda, Tomoki Browse this author →KAKEN DB
Manabe, Yumehiro Browse this author
Murugavel, Muthuchamy Browse this author
Ide, Yuki Browse this author
Inokuma, Yasuhide Browse this author →KAKEN DB
Keywords: Adsorbent
Transition metals
Issue Date: 7-May-2021
Publisher: Wiley-Blackwell
Journal Title: European journal of inorganic chemistry
Volume: 2021
Issue: 17
Start Page: 1705
End Page: 1708
Publisher DOI: 10.1002/ejic.202100172
Abstract: Metal ion adsorbents are indispensable materials for the recovery of noble metal ions in a sustainable society. Herein, we report that poly(isopyrazole-3,5-diyl-trans-vinylene) (1) effectively adsorbed group 10 metal ions from solution in acetonitrile. Owing to its fully pi-conjugated and rigid structure, polyimine 1 was virtually insoluble in common organic solvents and water, making it advantageous for metal ion adsorption via a solid/liquid interface. Inductively coupled plasma (ICP) analysis showed that >= 90 % of Ni2+, Pd2+, and Pt2+ ions were adsorbed at a concentration of 10 mu M (order of <= 2 ppm) after stirring suspensions at room temperature. Metal ion desorption was achieved by treatment with ethylenediaminetetraacetic acid disodium salt (EDTA . 2Na), and the adsorbent was reused. Theoretical calculations supported that the desolvation energy was an important factor for effective adsorption in acetonitrile.
Rights: This is the peer reviewed version of the following article: H. Shirakura, Y. Hijikata, J. Pirillo, T. Yoneda, Y. Manabe, M. Murugavel, Y. Ide, Y. Inokuma, Eur. J. Inorg. Chem. 2021, 2021, 1705. , which has been published in final form at This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 猪熊 泰英

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