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A New BODIPY-Derived Ratiometric Senor of Internal Charge Transfer (ICT) Effect:Colorimetric/Fluorometric Sensing for Ag+

Abstract

With the introduced 4-aminostyryl group at its 3-position, BODIPY was derived as a new ratiometric sensor for Ag+, BDP-ODTAC by modifying 4-amine as a Ag+ chelator 1-oxa-4,10-dithia-7-azacyclododecane (ODTAC). Besides the specific Ag+-induced hypsochromic absorption shift from 606 to 562 nm, this sensor demonstrates an excitation shift from 600 to 560 nm due to the internal charge transfer (ICT) effect endowed by the introduced -4-aminostyryl group. The Ag+-induced recovery and enhancement of intrinsic local emisison band is also observed. The different sensing behavior of ODTAC-BDP with chelator ODTAC substituing on meso-phenyl group infers that the ratiometric sensing behavior of BDP-ODTAC is correlated to amino group in ODTAC acting as the electron donor of ICT effect. With the high Ag+ selectivity over interfering cations such as Hg2+and Pb2+, BDP-ODTAC displays a fluorometric limitation of detection (LOD) of ~17 nM (~0.002 ppm), distinclty lower than EPA and WHO standards for drinking water (500 nM, ~0.055 ppm). Moreover, the BDP-ODTAC-doped PVC film shows the Ag+ sensitivity of 1 ppm with a color switch from blue to purple, providing this sensor the ability to determine Ag+ in total water solution sensitively via naked-eye detection.

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Supplementary files

Publication details

The article was received on 18 Nov 2017, accepted on 08 Jan 2018 and first published on 08 Jan 2018


Article type: Paper
DOI: 10.1039/C7DT04345G
Citation: Dalton Trans., 2018, Accepted Manuscript
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    A New BODIPY-Derived Ratiometric Senor of Internal Charge Transfer (ICT) Effect:Colorimetric/Fluorometric Sensing for Ag+

    W. He, C. Zhang, Z. Han, M. Wang, Z. Yang and X. Ran, Dalton Trans., 2018, Accepted Manuscript , DOI: 10.1039/C7DT04345G

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