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Metallo-Polymerization/-Cyclization of a C16-Bridged Di-Terpyridine Ligand and Iron(II) Ions

✍ Scribed by Philip R. Andres; Ulrich S. Schubert

Book ID
102495289
Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
127 KB
Volume
25
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

Summary: The coordinative polymerization/cyclization of a flexible monodisperse di‐terpyridine ligand with iron(II) chloride is reported. Matrix‐assisted laser desorption ionization time‐of‐flight (MALDI‐TOF) investigations showed the preferred formation of a [2 + 2] macrocycle, but also larger aggregates (cycles or linear oligomers) with up to 10 monomer units were found. Because of its C~16~‐spacer, the solubility is sufficient for performing viscosity experiments in CHCl~3~/MeOH solution. A viscosity titration revealed a maximum in viscosity at the 1‐to‐1 ratio of iron(II) ions to di‐terpyridine‐ligands, which indicates the formation of extended oligomers, polymers, catenanes and/or cycles at that ratio.

Schematic representation of intra‐ and intermolecular metallo‐macrocycles.

magnified imageSchematic representation of intra‐ and intermolecular metallo‐macrocycles.

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