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A relay strategy for the mercury (II) chemodosimeter with ultra-sensitivity as test strips
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Journal Article
A relay strategy for the mercury (II) chemodosimeter with ultra-sensitivity as test strips
2015
Overview
A relay strategy has been proposed to design a new Hg
2+
chemodosimeter (
TPE-S
), by coupling Hg
2+
-promoted deprotection reaction with ketone-enol isomerization, realizing the multistage amplifying effect. Changes in both of color and fluorescence could occur immediately and
TPE-S
displayed high selectivity for Hg
2+
, other metal ions (Ag
+
, Fe
3+
, Cu
2+
, Pb
2+
, Co
2+
, Cr
3+
, Al
3+
, Cd
2+
, Mg
2+
, Mn
2+
, Ba
2+
, Fe
2+
, Ca
2+
, Ni
2+
, Zn
2+
, Li
+
, K
+
and Na
+
) gave nearly no disturbance to the sensing process. When fabricated as test strips similar to pH-indicator papers, immediate color change from colorless to purple could be visually observed by naked-eyes without the aid of any additional equipment, with the detection limit as low as 1 × 10
−7
M (Hg
2+
in aqueous solution). Due to its easy synthesis, high selectivity and sensitivity, combined with the portable test strips,
TPE-S
could be developed as a convenient and cost-effective tool for the detection of Hg
2+
in on-site inspections.
