Polymerization of Vinyl Ethers by Iron(II) and Cobalt(II) Pyridyl Bis(imine) Complexes in the Presence of Methylaluminoxane

Abstract

Summary: The polymerizations of ethyl vinyl ether, n‐butyl vinyl ether and isobutyl vinyl ether were investigated with a series of pyridine bis(imine) complexes of iron(II) and cobalt(II) in the presence of methylaluminoxane. The cobalt catalysts showed much higher activity and produced higher molecular weight polymers than their iron analogues. Both catalyst systems produced predominantly atactic polymers. There were no specific trends in the activity and the polymer molecular weight, according to the steric bulk around the metal center.The iron(II) and cobalt(II) catalysts used here.imageThe iron(II) and cobalt(II) catalysts used here.

Tunability of Fluorescence Property of a Terbium‐Complex‐Containing Polymer via Incorporation of a Transition‐Metal Complex

“…The transition metals, which can impart unique electrical and optical properties to polymers,13–16 may help to realize the tunability 17. These 3d metals, in particular Fe, Mn, and Ni, are strong itinerant electron ferromagnets, whereas the lanthanides have localized 4f moments with high anisotropic energy 17–20. Thus, the materials with both rare‐earth complex and transition‐metal complex have a combination of d‐ and f‐elements, which are of fundamental interest in solid‐state chemistry and materials science 16,21–23.…”