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

被引：97

作者：

Goswami, Shyamaprosad ^{[1
]}

Paul, Sima ^{[1
]}

Manna, Abhishek ^{[1
]}

机构：

[1] Bengal Engn & Sci Univ, Sibpur 711103, Howrah, India

来源：

RSC ADVANCES | 2013年 / 3卷 / 47期

关键词：

FLUORESCENCE-ENHANCED SENSOR; TURN-ON CHEMOSENSOR; ALUMINUM TOXICITY; FLUOROMETRIC-DETERMINATION; RHODAMINE; RECOGNITION; LOGIC; PROBE; IONS; RECEPTOR;

D O I：

10.1039/c3ra44539a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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=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.

引用

页码：25079 / 25085

页数：7

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