Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 300, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2019.126825
Keywords
Naphthalimide; Rhodamine; Fluorescence; Chemosensors; Glutathione
Funding
- Deakin University
- Australian government
- Westpac Scholars Trust
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Dual-fluorophore systems have attracted attention as they offer versatile photophysical properties and multiple mechanisms for sensing. Here we report that the Hg2+ complex of rhodamine-nitronaphthalimide conjugate 1 functions as a switch-on sensor for the simultaneous detection of reduced (GSH) and oxidised (GSSG) glutathione via a resonance Rayleigh scattering process, with detection limits of 4.3 mu M and 11.9 mu M, respectively. Hydroxide anion regenerates nitronanphthalimide 1 causing the fluorescence to switch-off, and the system is recyclable. This photophysical behaviour towards Hg2+, GSH and HO- forms the basis of a molecular level INHIBIT and AND logic gate.
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