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Metallo‐Polymerization/‐Cyclization of a C 16 ‐Bridged Di‐Terpyridine Ligand and Iron( II ) Ions
Author(s) -
Andres Philip R.,
Schubert Ulrich S.
Publication year - 2004
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200400177
Subject(s) - terpyridine , chemistry , polymerization , polymer chemistry , ligand (biochemistry) , homoleptic , monomer , intermolecular force , polymer , metal , organic chemistry , molecule , biochemistry , receptor
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.