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Issue 47, 2013
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A differentially selective chemosensor for a ratiometric response to Zn2+ and Al3+ in aqueous media with applications for molecular switches

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Abstract

A multifunctional fluorescent chemosensor (PMN) for Al3+ and Zn2+ has been developed, which displays a dual-mode and “off–on” fluorescence response upon addition of Al3+ or Zn2+ at two different wavelengths. This was possibly due to the inhibition of PET and C[double bond, length as m-dash]N isomerism, and the activation of chelation-enhanced fluorescence (CHEF). Moreover, PMN exhibited a preferential second mode of selectivity for Al3+ as it ratiometrically displaces Zn2+ from the [PMN + Zn2+] complex. Such fluorescence modulation behavior mimics the performance of an “OR” logic gate. It also shows an excellent performance in the “dipstick” method.

Graphical abstract: A differentially selective chemosensor for a ratiometric response to Zn2+ and Al3+ in aqueous media with applications for molecular switches

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Supplementary files

Article information


Submitted
21 Aug 2013
Accepted
30 Sep 2013
First published
01 Oct 2013

RSC Adv., 2013,3, 25079-25085
Article type
Paper

A differentially selective chemosensor for a ratiometric response to Zn2+ and Al3+ in aqueous media with applications for molecular switches

S. Goswami, S. Paul and A. Manna, RSC Adv., 2013, 3, 25079 DOI: 10.1039/C3RA44539A

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