Synthetic, spectroscopic, structural, and electrochemical investigations of ferricenium derivatives with weakly coordinating anions: ion pairing, substituent, and solvent effects

Abstract

A facile and effective strategy for the preparation of a series of ferricenium complexes bearing either electron-donating or electron-withdrawing substituents with weakly coordinating anions such as [B(C6F5)4]– or SbF6– is...

Unveiling the Potential of Ag2S Reference Electrode: Empowering Calcium Electrochemical Reactions

“…Ferrocenium ions produce a bright blue color when in solution, and when mixed with the yellow-orange color from solvated ferrocene, a bright green colored solution would be expected. 25 This reaction has been recorded in other literature. 26 Given the muted oxidation peak and green discoloration, the redox reaction between ferrocene and silver is a strong probability for the side reaction observed at 0.65 V. The experiments performed to quantify silver(I) sulfide's drift made use of a reduced voltage window (−0.65 to 0.45 V) to avoid this unwanted side reaction between ferrocene and silver ions, which is the data shown in Figure 3.…”

From ferrocene to 1,2,3,4,5-pentafluoroferrocene: halogen effect on the properties of metallocene

“…This observation indicates a solvent-dependent decomposition pathway, in which the modestly nucleophilic acetonitrile reacts with the highly electrophilic polyfluoroferrocene cation, explaining the loss of reversibility in this solvent. 52,53 Table 1 Electrochemical data (in V). [a] Compd Epa [b,c] Epc [b,c] ipa/ipc [b,c] E1/2 [c,d] E1/2 The redox potentials of the 1,1'-and 1,2-isomers of difluoroferrocene, 1,1'-difluoroferrocene (E1/2 = 0.24 V) 43 Although fluorine is the most electronegative element, its inductive effect is counter-balanced by a strong resonance effect resulting from an overlapping of the fluorine lone pair with the Cp π orbitals.…”

Ferrocene-Based Porous Organic Polymer (FPOP): Synthesis, Characterization and an Electrochemical Study

“…A potential shift to lower values suggests an easier oxidation process for the adsorbed material compared to the ferrocene in solution (Epa = 35 mV and E 0 = 37 mV). This might be explained by the incorporation of alkyl groups acting as electron donors in the ferrocene ring at position 1,1′, which decreases the redox potential when compared to unsubstituted ferrocene (as already described for the simple alkylferrocenes) [49]. Another explanation for this difference could be attributed to the presence of the FPOP directly adsorbed on the electrode surface, promoting the redox process.…”