Evidence map›Paper›PMID 42251669›Full record

ArticleAngewandte Chemie (International ed. in English)2026

Tuning Local Charge-Density in COFs to Suppress Protonation and Unlock Binding Sites for Efficient Palladium Recovery.

Shijie Xiong, Pei Chen, Hanzhi Chen, Muliang Xiao, Ruining Cao, Jiaqi Li, Chuanlei Luo, Xinyi Yang, Xiaolu Liu, Yinghui Xie and 5 more

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In one paragraph

Article in Angewandte Chemie (International ed. in English), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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0citing papers in PubMed
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1 · What the graph read from it

What it found

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2 · The registry

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3 · Its place in the literature

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4 · The record

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5 · Who and what money

Authors and funding

15 authors.

Shijie XiongCollege of Environmental Science and Engineering, North China Electric Power University, Beijing, China.
Pei ChenCollege of Environmental Science and Engineering, North China Electric Power University, Beijing, China.
Hanzhi ChenCollege of Environmental Science and Engineering, North China Electric Power University, Beijing, China.
Muliang XiaoCollege of Environmental Science and Engineering, North China Electric Power University, Beijing, China.
Ruining CaoCollege of Environmental Science and Engineering, North China Electric Power University, Beijing, China.
Jiaqi LiCollege of Environmental Science and Engineering, North China Electric Power University, Beijing, China.
Chuanlei LuoCollege of Environmental Science and Engineering, North China Electric Power University, Beijing, China.
Xinyi YangCollege of Environmental Science and Engineering, North China Electric Power University, Beijing, China.
Xiaolu LiuCollege of Environmental Science and Engineering, North China Electric Power University, Beijing, China.
Yinghui XieCollege of Environmental Science and Engineering, North China Electric Power University, Beijing, China.ORCID https://orcid.org/0000-0001-5063-5547
Mengjie HaoCollege of Environmental Science and Engineering, North China Electric Power University, Beijing, China.
Geoffrey I N WaterhouseSchool of Chemical Sciences, The University of Auckland, Auckland, New Zealand.
Xiangke WangCollege of Environmental Science and Engineering, North China Electric Power University, Beijing, China.
Shengqian MaDepartment of Chemistry, University of North Texas, Denton, USA.ORCID https://orcid.org/0000-0002-1897-7069
Hui YangCollege of Environmental Science and Engineering, North China Electric Power University, Beijing, China.ORCID https://orcid.org/0000-0002-6745-642X

Funding

Beijing Outstanding Young Scientist ProgramMacDiarmid Institute for Advanced Materials and NanotechnologyNational Natural Science Foundation of China 22322603National Natural Science Foundation of China 22506048National Natural Science Foundation of China U24B20195Robert A. Welch Foundation B-0027
6 · The paper itself

Abstract

Imine-linked COFs are increasingly being used to recover palladium from aqueous waste streams, but the binding sites undergo protonation in acidic media, thereby losing palladium adsorption capacity. Herein, we report a new strategy that effectively suppresses imine protonation in COFs by tuning the local charge density, thereby allowing highly efficient recovery of Pd(II) from acidic solutions. By judicious placement of electron-donating hydroxyl substituents on aromatic units next to imine groups, the electron cloud density around imine N atoms increases, suppressing protonation and preserving a high density of accessible Pd(II) binding sites. Further incorporation of extended π-conjugated naphthalene units increases local charge density at the imine centers, strengthening the Pd(II) affinity and boosting adsorption capacity. As a result, the optimized adsorbent (COF-3) exhibits rapid adsorption kinetics, exceptional selectivity, and an unprecedented Pd(II) uptake of 942.02 ± 24.61 mg/g in 0.1 M HNO

Indexed as

charge densitycovalent organic frameworksPd(II) recoveryselective adsorptionsuppress protonation

Identifiers

PMID42251669
PMCPMC13452533

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