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

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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.
Related projects:	CEITEC 2020 Podpora biochemického výzkumu v roce 2019 ROS-Induced Drug Release Based on Interactions of Ferrocenylboronates