Issue 38, 2013

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

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

Supplementary files

Article information

Article type
Paper
Submitted
18 Mar 2013
Accepted
09 Jul 2013
First published
09 Jul 2013

Dalton Trans., 2013,42, 13889-13896

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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