Conductive Mediators in Oxidation Based on Ferrocene Functionalized Phosphonium Ionic Liquids

Autor: Vadim V. Ermolaev, Liliya R. Kadyrgulova, Mikhail N. Khrizanforov, Tatiana P. Gerasimova, Gulnaz R. Baembitova, Anna A. Lazareva, Vasili A. Miluykov
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: International Journal of Molecular Sciences, Vol 23, Iss 24, p 15534 (2022)
Druh dokumentu: article
ISSN: 1422-0067
1661-6596
DOI: 10.3390/ijms232415534
Popis: Herein, the synthesis of ferrocene-containing salts is presented. Acylation of ferrocene (Fc) according to the Friedel–Crafts method led to ω-bromoacyl ferrocenes. The ω-bromoacyl ferrocenes were subsequently introduced to quaternization reaction with tri-tert-butyl phosphine, which resulted in phosphonium salts. Obtained phosphonium salts were characterized by physical methods. The electrochemical properties of phosphonium salts were studied by cyclic voltammetry (CV). It was found that the replacement of n-butyl fragments at the phosphorus atom by tert-butyl leads to a more anodic potential shift. In contrast to isolobal structures Fc-C(O)(CH2)nP+(n-Bu)3X− and Fc-(CH2)n+1P+(n-Bu)3X−, the CV curves of Fc-C(O)(CH2)nP+(t-Bu)3X− and Fc-(CH2)n+1P+(t-Bu)3X− did not show a large discrepancy between forward and reverse currents. The transformation of the C=O groups to CH2 fragments had a significant effect on the electrochemical properties of ferrocene salts, the oxidation potential of which is close to that of pure ferrocene.
Databáze: Directory of Open Access Journals
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