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 language | English |
|---|---|
| Pages (from-to) | 2847-2852 |
| Number of pages | 6 |
| Journal | European journal of inorganic chemistry |
| Issue number | 14 |
| DOIs | |
| Publication status | Published - 19 Jul 2004 |
| Externally published | Yes |
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Keywords
- Lanthanides
- NMR spectroscopy
- Self-assembly
- Tridendate ligands
- Viscosity
Cite this
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3-D water-soluble reversible neodymium(III) and lanthanum(III) coordination polymers. / Vermonden, Tina; De Vos, Wiebe M.; Marcelis, Antonius T.M.; Sudhölter, Ernst J.R.
In: European journal of inorganic chemistry, No. 14, 19.07.2004, p. 2847-2852.Research output: Contribution to journal › Article › Academic › peer-review
TY - JOUR
T1 - 3-D water-soluble reversible neodymium(III) and lanthanum(III) coordination polymers
AU - Vermonden, Tina
AU - De Vos, Wiebe M.
AU - Marcelis, Antonius T.M.
AU - Sudhölter, Ernst J.R.
PY - 2004/7/19
Y1 - 2004/7/19
N2 - 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.
AB - 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.
KW - Lanthanides
KW - NMR spectroscopy
KW - Self-assembly
KW - Tridendate ligands
KW - Viscosity
UR - http://www.scopus.com/inward/record.url?scp=4544326746&partnerID=8YFLogxK
U2 - 10.1002/ejic.200400098
DO - 10.1002/ejic.200400098
M3 - Article
SP - 2847
EP - 2852
JO - European journal of inorganic chemistry
JF - European journal of inorganic chemistry
SN - 1434-1948
IS - 14
ER -