Electrochemical oxidation of double-stranded polybisnorbornenes containing linearly aligned ferrocene linkers

摘要

Seventy percent of the ferrocene moieties in double-stranded polybisnorbornenes containing linearly aligned ferrocene linkers are oxidised and each of the neighbouring monomeric units in these polymers may strongly interact with each other; the oxidised form of 3c has been shown to be antiferromagnetic.rnThere has been ever burgeoning interest on the electrochemistry of macromolecules containing multiple electroactive centers. Multielectron transfer is common in these polymers and their voltammetric curves are occasionally similar to those of one-electron transfer reactions. The electrochemical behaviour of these polymers depends on whether interactions between these electroactive groups are present or not.1'2 For example, in the oxidation of poly(vinylferrocene) 1, all the ferrocene groups are oxidised at one potential and it is believed that there is little interaction between these iron-containing sandwich pending groups. On the other hand, when the ferrocene moieties are part of the polymeric backbone separated by different types of linkers, two reversible oxidation waves are in general observed.