2005
DOI: 10.1021/ja0545766
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Highly Selective Chromogenic and Redox or Fluorescent Sensors of Hg2+ in Aqueous Environment Based on 1,4-Disubstituted Azines

Abstract: Two new chemosensors that exhibit high affinity and high selectivity for Hg2+ in aqueous environment which operate through two different channels, optic/redox and optic/fluorescent, are reported. The optical change in sensing can be used even for a "naked-eye" detection of Hg2+ ions, whereas the fluorescent response can be modulated by varying the solvent polarity.

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Cited by 465 publications
(192 citation statements)
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“…In spite of being very sensitive and precise for Hg determination, these methods often require a time-consuming sample preparation step as well as expensive instrumentation. Various colorimetric assays (based on the use of sensitive chromophores or fluorophores [8][9][10][11], polymers [12,13], oligonucleotides [14,15], DNA [16,17], and metal nanoparticles [18][19][20]) have been developed and reported in the literature as convenient and simple alternative methods for the detection of target analytes without the requirement of sophisticated apparatus.…”
Section: Introductionmentioning
confidence: 99%
“…In spite of being very sensitive and precise for Hg determination, these methods often require a time-consuming sample preparation step as well as expensive instrumentation. Various colorimetric assays (based on the use of sensitive chromophores or fluorophores [8][9][10][11], polymers [12,13], oligonucleotides [14,15], DNA [16,17], and metal nanoparticles [18][19][20]) have been developed and reported in the literature as convenient and simple alternative methods for the detection of target analytes without the requirement of sophisticated apparatus.…”
Section: Introductionmentioning
confidence: 99%
“…A number of fluorescence-based probes and sensors for detection of Hg(II) have been reported. [2][3][4][5][6][7][8][9][10] However, many fluorescent small-molecule-based Hg(II) sensors presented to date are quenched upon Hg(II) coordination, often rely on an irreversible Hg(II)-dependent chemical reaction to give fluorescence turn-on, and/or require organic solvent systems. Most of these sensors display drawbacks in terms of actual applicability such as the lack of water solubility, cross-sensitivity toward other metal ions, weak fluorescence enhancement factor, and short emission wavelengths.…”
Section: Introductionmentioning
confidence: 99%
“…[10,11] , 化合物 1 在紫外区分别位于 257 nm (ε=6.4× [10,11,20] . 并且从图中可以发现在 Cr 随着 Cr 3+ 滴加量的增大, 其可归属为蒽荧光团位于约 470 nm 处的发射峰逐渐增大, 这种荧光强度增大可能 是金属离子与配体的络合作用减弱了二茂铁到蒽的分 子内电子转移(ICT) [21,22] .…”
Section: 利用羰基与氨基缩合反应生成含-Ch=n-双键席夫unclassified