Rapid-scan time-resolved FT-IR spectroelectrochemistry – Study on the electron transfer of ferrocene-substituted thiophenes

Synthesis and Electrochemical Investigations of [Ru(η5‐Ferrocenyl‐Thiophene)(η5‐C5R5)]+ Sandwich Compounds

“…[1a], [2d], In the field of organometallic chemistry foremost ferrocene derivatives are applied as redox‐active increments . Electrochemical investigations were carried out on a plethora of ferrocenylated arenes, including benzenes[4f], [4l], and heterocycles[4j], [4k], and on ferrocenyl‐substituted transition metal complexes. [4m], In general, the magnitude of electronic coupling in mixed‐valence compounds depends strongly on the electronic structure of the respective species in combination with their environmental conditions.…”

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

“…The multi‐step oxidation process derived from the multi‐ferrocene system can be controlled by the π‐conjugated spacer connecting ferrocene fragments due to the fact that the strength of the electronic communication between the mixed‐valent metal centers strongly depends on the electronic nature and length of the linking π‐conjugated spacer. Thus, there have been investigations of multi‐ferrocene derivatives bridged by a wide variety of π‐conjugated spacers such as aromatics (eg, benzene), heteroaromatics (eg, pyrrole, phosphole, furan, thiophene), and their oligomers (eg, oligopyrrole:, oligofuran, oligothiophene).…”

Synthesis of New Types of Ferrocene Dimers Bridged by a Fused Oligothiophene Spacer and Study of Their Electrochemical Oxidation Process via a Mixed‐Valence State

“…In this paper, we provide the details of the synthesis and electrochemical oxidation properties of a new type of ferrocene dimer bridged by syn ‐ or anti ‐thienothiophenes (diferrocenylthienothiophenes (DFTTs)), syn ‐ or anti ‐benzodithiophenes (diferrocenylbenzodithiophenes (DFBDTs)), and dithienothiophene (2,6‐diferrocenyldithieno[3,2‐ b :2′,3′‐ d ]thiophene (DFDTT)), including the known oxidation properties of 2,5‐diferrocenylthiophene as a basic ferrocene dimer for comparison .…”

“…It has been shown that the geometry, electronic structure, and length of the π‐conjugated spacer strongly affect the electronic communication of the mixed‐valent species in ferrocene dimers. In this research field, ferrocene dimers with an oligothiophene spacer differing in the number of thiophene rings (1–6) or its analogues have been focused on by investigating electronic communication based on the charge transfer and delocalization in their mixed‐valent system . Because oligothiophenes with a π‐conjugated planar structure as the oligomer of thiophene with the π‐donor ability of the heterocycles having a heavy atom (sulfur), due to their low oxidation potentials and charge delocalization ability along the backbone in the oxidation state , are expected to enhance the electronic communication in a one‐dimensional mixed‐valent system in comparison to the other π‐conjugated spacers.…”