Publication details

Voltammetric characterisation of diferrocenylborinic acid in organic solution and in aqueous media when immobilised into a titanate nanosheet film

Authors

KONHEFR Martin SEDGWICK Adam C. JAMES Tony D. LACINA Karel SKLÁDAL Petr PUTRA Budi Riza HARITO Christian BAVYKIN Dmitry V. WALSH Frank C. RAITHBY Paul R. KOCIOK-KÖHN Gabriele MARKEN Frank

Year of publication 2019
Type Article in Periodical
Magazine / Source Dalton Transactions
MU Faculty or unit

Faculty of Science

Citation
Web Gold open access of article
Doi http://dx.doi.org/10.1039/c9dt00881k
Keywords borinic acid; boronic acid; ferrocene; titanate nanosheets; fluoride; sensing
Description Diferrocenylborinic acid (Fc2BOH,1) has been synthesized in good yield via an improved synthetic path. Characterisation by nuclear magnetic resonance (NMR), mass spectrometry (HRMS), infrared spectroscopy (FTIR), X-ray crystallography, and by electrochemical methods reveal two one-electron oxidation processes for the two electronically coupled ferrocenyl moieties. The oxidation of 1 dissolved in organic media is contrasted to the oxidation of 1 in aqueous environments (by incorporation of 1 into a lamellar film of 2D titanate nanosheets on a glassy carbon electrode). Data from cyclic voltammetry and from square wave voltammetry suggest that the bridging boron can bind to nucleophiles (hydroxide, fluoride) upon oxidation of the ferrocenyl groups. A multi-pathway ECE reaction scheme is proposed. Potential applications in sensing are discussed.
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