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Forskningsartikel2015Vetenskapligt granskad

Molecular insights into the selective action of a magnetically removable complexone-grafted adsorbent

Polido Legaria, Elizabeth; Topel, Seda Demirel; Kessler, Vadim; Seisenbaeva, Gulaim


The binding and release of trivalent rare earth element (REE) cations (Dy3+, Nd3+ and La3+) from solutions by a new fully characterized magnetic nano adsorbent material, consisting of iminodiacetic acid ligand (H(2)IDA) grafted onto SiO2 covered gamma-Fe2O3 nanoparticles, was investigated. The nano adsorbent revealed a slightly higher capacity towards heavier REE and appreciable selectivity, especially on desorption. It was found that the composition of the surface complex was RE3+ : L = 1:1. The complexation of the molecular H(2)IDA with RE3+ in this ratio under non-basic conditions was therefore investigated by X-ray crystallography to produce relevant molecular models. Unexpectedly big differences in coordination numbers and binding mode of IDA along with distinct analogies in packing of the ligand molecules in the obtained 2D-coordination polymer structures provided valuable insights into possible reasons for the observed selectivity.


magnetic adsorbents, rare earth elements, nanoparticles, hybrid materials, molecular models

Publicerad i

Dalton Transactions
2015, Volym: 44, nummer: 3, sidor: 1273-1282

      SLU författare

    • Polido Legaria, Elizabeth

      • Institutionen för kemi och bioteknologi, Sveriges lantbruksuniversitet
      • Topel, Seda Demirel

        • Institutionen för kemi och bioteknologi, Sveriges lantbruksuniversitet
        • Kessler, Vadim

          • Institutionen för kemi och bioteknologi, Sveriges lantbruksuniversitet
        • UKÄ forskningsämne

          Oorganisk kemi
          Organisk kemi

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