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Issue 8, 2019
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A colorimetric and “off–on” fluorescent Pd2+ chemosensor based on a rhodamine-ampyrone conjugate: synthesis, experimental and theoretical studies along with in vitro applications

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Abstract

We successfully designed and developed a rhodamine based “turn-on” chemosensor L for the detection of Pd2+ ions down to 1.19 × 10−5 M (11.9 μM). In organo-aqueous solution, probe L displayed highly selective and sensitive colorimetric and fluorescence responses toward Pd2+ based on the ring-opening mechanism of the rhodamine spirolactam ring upon complexation with Pd2+. In the presence of Pd2+ ions, probe L formed an L–Pd2+ complex in 1 : 1 stoichiometry which was confirmed by the Job plot and mass spectroscopy. Moreover, we performed DFT (density functional theory) studies to identify the coordination characteristics and binding nature of L and the L–Pd2+ complex. In addition, cell imaging experiments revealed that probe L was able to permeate cells, and able to image Pd2+ in living cells.

Graphical abstract: A colorimetric and “off–on” fluorescent Pd2+ chemosensor based on a rhodamine-ampyrone conjugate: synthesis, experimental and theoretical studies along with in vitro applications

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Publication details

The article was received on 12 Oct 2018, accepted on 22 Jan 2019 and first published on 23 Jan 2019


Article type: Paper
DOI: 10.1039/C8NJ05194A
Citation: New J. Chem., 2019,43, 3513-3519

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    A colorimetric and “off–on” fluorescent Pd2+ chemosensor based on a rhodamine-ampyrone conjugate: synthesis, experimental and theoretical studies along with in vitro applications

    S. Mondal, S. K. Manna, S. Pathak, A. A. Masum and S. Mukhopadhyay, New J. Chem., 2019, 43, 3513
    DOI: 10.1039/C8NJ05194A

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