Electrochemical studies of the multi‐step multi‐electron redox process of tetraferrocenyloligothiophenes with electron donor and acceptor abilities

Abstract

We have designed and synthesized tetraferrocenyloligothiophenes, namely, 4,4′5,5′‐tetraferrocenyl‐2,2′‐bithiophene (TFBT) and 4,4″,5,5″‐tetraferrocenyl‐2,2′:5′,2″‐terthiophene (TFTT). By using an electrochemical technique, we revealed that tetraferrocenyloligothiophenes show multi‐redox reactions derived from four ferrocene fragments and one α‐oligothiophene spacer, and a number of the thiophene rings in the α‐oligothiophene spacer can be attuned to the redox potentials and the multiple electron transfer process. Consequently, we have succeeded in the construction of different types of multi‐step multi‐electron redox systems by constructing four organometallic redox‐active ferrocenes and one organic redox‐active α‐oligothiophene differing in the number of thiophene rings.

Electrochemical Properties and Structure of Multi-Ferrocenyl Phosphorus Thioesters

“…Consequently, more and more multi-ferrocenes are synthesized to study their charge transfer processes and to match intramolecular charge transfer interactions numbers. [3][4][5][6][7][8][9][10][11][12][13] Typically, the multi-ferrocenyl compounds contain the π-conjugated spacers binding two or more ferrocene moieties (see for example [12,13]). The approach based on the construction of multi-ferrocenyl compounds using spacers capable of transmitting exchange interactions was successfully implemented to obtain new practically significant materials.…”