Photo- and Electrochemical Dual-Responsive Iridium Probe for Saccharide Detection

Andrew J. Carrod, Francesco Graglia, Louise Male, Cécile Le Duff, Peter Simpson, Mohamed Elsherif, Zubair Ahmed, Haider Butt, Guang Xi Xu, Kenneth Kam-Wing Lo, Paolo Bertoncello, Zoe Pikramenou

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Dual detection systems are of interest for rapid, accurate data collection in sensing systems and in vitro testing. We introduce an IrIII complex with a boronic acid receptor site attached to the 2-phenylpyridine ligand as an ideal probe with photo- and electrochemical signals that is sensitive to monosaccharide binding in aqueous solution. The complex displays orange luminescence at 618 nm, which is reduced by 70 and 40 % upon binding of fructose and glucose, respectively. The electro-chemiluminescent signal of the complex also shows a direct response to monosaccharide binding. The IrIII complex shows the same response upon incorporation into hydrogel matrices as in solution, thus demonstrating the potential of its integration into a device, as a nontoxic, simple-to-use tool to observe sugar binding over physiologically relevant pH ranges and saccharide concentrations. Moreover, the complex's luminescence is responsive to monosaccharide presence in cancer cells.

Original languageBritish English
Article numbere202103541
JournalChemistry - A European Journal
Volume28
Issue number4
DOIs
StatePublished - 19 Jan 2022

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