3-D water-soluble reversible neodymium(III) and lanthanum(III) coordination polymers

Tina Vermonden, Wiebe M. de Vos, Antonius T.M. Marcelis*, Ernst J.R. Sudhölter

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

52 Citations (Scopus)

Abstract

The formation of soluble supramolecular 3-D coordination polymers with Nd3+ and La3+ in aqueous solution has been studied for two bifunctional ligands consisting of two pyridine-2,6-dicarboxylate groups connected at the 4-position by O(CH2CH2O)4 and O(CH2CH2O)6 spacers (C4 and C6, respectively). Viscosity measurements were used to monitor the network formation as a function of the ligand concentration, and the ratio between metal ions and ligands. For corresponding conditions C4 solutions with Nd3+ always gave much higher viscosities than C6 solutions with Nd3+. C6 is long, and flexible enough to bind with both chelating groups to only one metal ion (ring formation). This causes the polymers to stop growing, resulting in smaller average sizes of the 3-D polymers. The ring-structures could be demonstrated by 1H NMR spectroscopy using C6 and La3+ at low concentrations.

Original languageEnglish
Pages (from-to)2847-2852
Number of pages6
JournalEuropean journal of inorganic chemistry
Volume2004
Issue number14
DOIs
Publication statusPublished - 19 Jul 2004
Externally publishedYes

Keywords

  • Lanthanides
  • NMR spectroscopy
  • Self-assembly
  • Tridendate ligands
  • Viscosity

Fingerprint Dive into the research topics of '3-D water-soluble reversible neodymium(III) and lanthanum(III) coordination polymers'. Together they form a unique fingerprint.

Cite this