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“Off–on–off” type of selectively pH-sensing 8-hydroxyquinoline-substituted gallium(iii) corrole

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Abstract

We herein report the synthesis and pH-sensing properties of novel gallium corrole derivatives based on 8-hydroxyquinoline. The free base corrole and its gallium corrole derivatives were fully characterized using NMR spectroscopy and mass spectrometry. Their photophysical and electrochemical properties were also investigated using UV/Vis spectroscopy, fluorescence spectroscopy, MCD spectroscopy and cyclic voltammetry. A Ga-corrole derivative showed a good fluorescence response to change in pH in a wide pH range, from pH 1 to 12. Specifically, its fluorescence gradually diminished, from a high intensity at neutral pH, as the pH was either decreased or increased, i.e., into acidic and basic conditions, respectively. These results indicated that the Ga-corrole derivative would be able to serve as an efficient “off–on–off” fluorescent sensor of pH in the solution state.

Graphical abstract: “Off–on–off” type of selectively pH-sensing 8-hydroxyquinoline-substituted gallium(iii) corrole

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Publication details

The article was received on 03 Sep 2019, accepted on 17 Oct 2019 and first published on 01 Nov 2019


Article type: Paper
DOI: 10.1039/C9NJ04544A
New J. Chem., 2019, Advance Article

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    “Off–on–off” type of selectively pH-sensing 8-hydroxyquinoline-substituted gallium(III) corrole

    F. Cai, F. Xia, Y. Guo, W. Zhu, B. Fu, X. Liang, S. Wang, Z. Cai and H. Xu, New J. Chem., 2019, Advance Article , DOI: 10.1039/C9NJ04544A

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