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Issue 38, 2013
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Solvent viscosity tuned highly selective NIR and ratiometric fluorescent sensing of Fe3+ by a symmetric chalcone analogue

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Abstract

The present communication outlined for the first time a novel combination of chromogenic near-infrared (NIR) and ratiometric fluorescence responses for Fe3+ by a symmetric chalcone analogue (receptor 1). The key step behind NIR chromogenic response was attributed to chelation of Fe3+ with receptor 1 upon its unfolding in aprotic, low viscosity solvents. The receptor 1 also exhibited Fe3+ selective ratiometric changes at 538 nm and 463 nm. The chromogenic detection limit of the receptor 1 for Fe3+ is the lowest ever (5.8 × 10−8 M). The mechanistic details of NIR/fluorescence sensing of receptor 1 along with its solvent dependency have been discussed in detail.

Graphical abstract: Solvent viscosity tuned highly selective NIR and ratiometric fluorescent sensing of Fe3+ by a symmetric chalcone analogue

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Publication details

The article was received on 18 Mar 2013, accepted on 09 Jul 2013 and first published on 09 Jul 2013


Article type: Paper
DOI: 10.1039/C3DT50733E
Citation: Dalton Trans., 2013,42, 13889-13896
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    Solvent viscosity tuned highly selective NIR and ratiometric fluorescent sensing of Fe3+ by a symmetric chalcone analogue

    U. Diwan, A. Kumar, V. Kumar and K. K. Upadhyay, Dalton Trans., 2013, 42, 13889
    DOI: 10.1039/C3DT50733E

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