Buchanan, Jason S.Pollard, Brett L.Shen, PeidongPreston, DanConnal, Luke A.2025-12-162025-12-160947-6539PubMed:40357711ORCID:/0009-0007-6252-6568/work/187021965ORCID:/0000-0001-7519-977X/work/187022283WOS:001485958400001https://hdl.handle.net/1885/733795185The selective sequestration of aqueous palladium from waste is an attractive option for metal recovery. However, achieving good metal specificity remains a difficult problem. In this study, we present the synthesis of a metallo-supramolecular system based on a 2-pyridyl-1,2,3-triazole chelating ligand group. Excellent selectivity for Pd(II) ions over Pt(II), Ni(II), Fe(II), Co(II), and Zn(II) from a mixed-metal solution was demonstrated through ESI-MS and 1H NMR spectroscopic studies of a model ligand system. Following this, a water-soluble copolymer system containing 2-pyridyl-1,2,3-triazole functional groups was prepared. This polymer was shown to exhibit the same specificity for Pd(II) in a mixed-metal solution, quantitatively supported by dialysis and ICP-MS experiments. These findings demonstrate the potential of metallo-supramolecular polymers in selective metal recovery.The authors thank Dr Brett Knowles, Ms Hahjung Chin, and Dr Yang Wu from the ICP-MS research facility, ANU Research School of Earth Sciences, for their assistance with ICP-MS data collection. The authors also thank Dr Doug Lawes and Dr Michael Gardiner from the ANU Magnetic Resonance and X-ray Diffraction facilities, respectively. The authors further acknowledge the Australian National University and the Research School of Chemistry for funding and support. Jason S. Buchanan, Peidong Shen, and Brett L. Pollard acknowledge the Australian Research Council for their RTP scholarships and funding. Dan Preston and Luke A. Connal acknowledge the Australian Research Council for a Future Fellowship (FT230100126) and Industry fellowship (IM230100090), respectively.8en© 2025 The Author(s). Chemistry – A European Journal published by Wiley-VCH GmbH.metal recoverymetal selectivitypalladiumpyridyl triazolesequestrationsupramolecular polymers2025-05-1310.1002/chem.202500392105005226920