Journal
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
Volume 248, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2020.119252
Keywords
Hg2+; Ferrocene; Si-rhodamine; Near-infrared probe; Optical and redox-active receptor; NIR imaging
Categories
Funding
- National Natural Science Foundation of China [21372147]
- Undergraduate Innovative Research Training Program of Shandong Province [S202010445114]
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The novel near-infrared optical and redox-active receptor can detect Hg2+ in water at ppb level with low detection limit and multi-feature analysis functions, showing high sensitivity to Hg2+. A possible sensing model was established through theoretical studies.
A key issue for constructing optical and redox-active receptors is how to conjugate a specific sensing kernel with a multi-signal-responsive system to carry out multi-feature analysis. Mercury is considered to be highly toxic to human health and ecological security. In this work, we present a novel near-infrared optical and redox-active receptor that can sense Hg2+ at ppb level in aqueous media via multi-model monitors with a low detection limit of 8.4 x 10(-9) M (1.68 ppb). This receptor features a visible detection, 'off-on' fluorescence response, and efficient electrochemistry assessment, as well as pH-insensitivity to Hg2+ with high sensitivity. In view of its marked near-infrared emission and fluorescence enhancement, we successfully applied this receptor to visualize Hg2+ in live cells. Furthermore, a possible sensing model was established and rationalized with theoretical studies. (C) 2020 Elsevier B.V. All rights reserved.
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