Metallo-polymerization/-cyclization of a C16-bridged di-terpyridine ligand and iron(II) ions

被引:20
作者
Andres, PR
Schubert, US
机构
[1] Eindhoven Univ Technol, Lab Macromol Chem & Nanosci, NL-5600 MB Eindhoven, Netherlands
[2] Univ Munich, Ctr Nanosci, D-80333 Munich, Germany
关键词
addition polymerization; macrocycles; terpyridine telechelic; transition metal chemistry; viscosity;
D O I
10.1002/marc.200400177
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
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 CHCl3/MeOH solution. A viscosity titration revealed a maximum in viscosity at the 1-to-1 ratio of iron(n) ions to di-terpyridine-ligands, which indicates the formation of extended oligomers, polymers, catenanes and/or cycles at that ratio.
引用
收藏
页码:1371 / 1375
页数:5
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