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Rapid “turn-on” photoluminescence detection of bisulfite in wines and living cells with a formyl bearing bis-cyclometalated Ir(III) complex

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Abstract

A new photoluminescence (PL) probe based on a formyl bearing bis-cyclometalated Ir(III) complex, [Ir(ppy)2phen-CHO]+PF6 (1), is synthesized and applied to the selective detection of a bisulfite anion (HSO3). Probe 1 is prepared using 2-phenylpyridine (ppy) as the C^N main ligand and 1,10-phenanthroline-5-carboxaldehyde (phen-CHO) as the N^N ancillary ligand. Probe 1 displayed excellent selective PL enhancement in response to HSO3 in acetic acid-sodium acetate buffer solution (pH = 5.0). The increase of PL signal is directly proportional to the concentration of HSO3 in the range of 2 μM to 45 μM with a detection limit of 0.9 μM using 50 μM probe 1 and in the range of 0.5 μM to 6 μM with a detection limit of 0.3 μM using 10 μM probe 1. More importantly, probe 1 can respond to HSO3 rapidly within 40 s. Furthermore, probe 1 was successfully applied to detect HSO3 in real white wines and the bioimaging of HSO3 in living cells. The superior properties of probe 1 make it of great potential use for studying the effects of HSO3 in other biosystems.

Graphical abstract: Rapid “turn-on” photoluminescence detection of bisulfite in wines and living cells with a formyl bearing bis-cyclometalated Ir(iii) complex

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Publication details

The article was received on 08 Apr 2018, accepted on 07 Jun 2018 and first published on 11 Jun 2018


Article type: Paper
DOI: 10.1039/C8AN00640G
Citation: Analyst, 2018, Advance Article
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    Rapid “turn-on” photoluminescence detection of bisulfite in wines and living cells with a formyl bearing bis-cyclometalated Ir(III) complex

    H. Gao, H. Qi, Y. Peng, H. Qi and C. Zhang, Analyst, 2018, Advance Article , DOI: 10.1039/C8AN00640G

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