Colorimetric sensor for highly sensitive and selective detection of copper ion

Gao, Qi; Ji, Ling; Wang, Qiaoning; Yin, Kun; Li, Jinhua; Chen, Lingxin

doi:10.1039/c7ay01335c

Cited by 40 publications

(18 citation statements)

References 35 publications

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“…The authors also reported that the chemodosimeter has an association constant of 8.80×10 5 M −1 with detection limit of 5.53×10 −7 M, with a visual change in color. Colorimetric sensor consisting of L‐cysteine with a probe Cy‐NB is also found effective for copper detection with a distinct visual color change . The probe is selective for Cu 2+ and has a copper detection limit of 8.6 nM.…”

Section: Detection Of Copper By Sensing Technologymentioning

confidence: 99%

Optical Sensing of Copper and Its Removal by Different Environmental Technologies

et al. 2020

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Heavy metal detection by sensing technology is an important field of research as the heavy metals are toxic and are found in the environmental matrix. The detailed structure and sensing property studies of the probes enhance the knowledge for the future design and development of a probe for same metal. In this review, we have discussed about different chemo and fluorosensors for copper detection and their sensing parameters in different media with detailed structural studies. The removal of copper from the water medium is also addressed in this review. Application of membrane process, adsorption, and electrocoagulation along with their implementation challenges are discussed.

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Section: Detection Of Copper By Sensing Technologymentioning

confidence: 99%

Optical Sensing of Copper and Its Removal by Different Environmental Technologies

et al. 2020

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“…For example, of the 55 sensors mentioned above, only 14 sensors displayed naked-eye detection below 10 μM. 34 , 42 , 44 , 50 , 53 , 57 , 61 , 65 , 66 , 69 , 70 , 72 , 76 , 87 Furthermore, only three of the studies challenged copper sensing in the presence of a competing metal ion 34 , 61 , 70 and none challenged copper sensing in the presence of 10-fold excess competing metal to copper, which is achieved in this work.…”

Section: Introductionmentioning

confidence: 99%

Highly Sensitive and Selective Spiropyran-Based Sensor for Copper(II) Quantification

et al. 2021

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The metal-binding capabilities of the spiropyran family of molecular switches have been explored for several purposes from sensing to optical circuits. Metal-selective sensing has been of great interest for applications ranging from environmental assays to industrial quality control, but sensitive metal detection for field-based assays has been elusive. In this work, we demonstrate colorimetric copper sensing at low micromolar levels. Dimethylamine-functionalized spiropyran ( SP1 ) was synthesized and its metal-sensing properties were investigated using UV–vis spectrophotometry. The formation of a metal complex between SP1 and Cu 2+ was associated with a color change that can be observed by the naked eye as low as ≈6 μM and the limit of detection was found to be 0.11 μM via UV–vis spectrometry. Colorimetric data showed linearity of response in a physiologically relevant range (0–20 μM Cu 2+ ) with high selectivity for Cu 2+ ions over biologically and environmentally relevant metals such as Na + , K + , Mn 2+ , Ca 2+ , Zn 2+ , Co 2+ , Mg 2+ , Ni 2+ , Fe 3+ , Cd 2+ , and Pb 2+ . Since the color change accompanying SP1 –Cu 2+ complex formation could be detected at low micromolar concentrations, SP1 could be viable for field testing of trace Cu 2+ ions.

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“…They also often require pre-concentration and/or filtering of the analytes, which all together prevent on-site, real time detection or systematic analysis. Recently more suitable devices for low cost and on-site measurements have been developed based on both colorimetric (Gao et al, 2017) and fluorescence (Zhang et al, 2018;Liu et al, 2018) optical spectroscopies, electrochemical (Cinti et al, 2018) or photo-electrochemical (Wang et al, 2018) techniques combined with a metal-ligand to increase selectivity. However, most of these devices are limited in term of LOD to the nanomolar or picomolar range.…”

Section: Introductionmentioning

confidence: 99%

Femtomolar detection of Cu2+ ions in solution using super-Nernstian FET-sensor with a lipid monolayer as top-gate dielectric

Kenaan

Brunel

Raimundo

et al. 2020

Sensors and Actuators B: Chemical

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The development of ions sensors with low limit of detection and high sensitivity and selectivity is required in many fields of application and still remains a challenge. We report on the first dual-gated field effect transistor sensor with an engineered lipid monolayer as top gate dielectric. The sensor was designed and fabricated for the specific detection of Cu 2+ using the Di-2-picolylamine as recognition unit. The lipid monolayer was reticulated to achieve high mechanical and dielectric stability over device operation. The resulting sensor exhibits exceptional performances with a limit of detection at 10 femtomolar, with a linear dependency over 10 decades and a super-Nernstian sensitivity of ~100 mV/decade. We also show that the lipid layer forms a good barrier to ions trapping, hence providing a high stability of the sensor over measurements.

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Colorimetric sensor for highly sensitive and selective detection of copper ion

Abstract: Colorimetric detection of Cu2+based on the inhibiting effect of Cu2+on the reaction ofl-cysteine with the established probe Cy-NB.

Cited by 40 publications

References 35 publications

Optical Sensing of Copper and Its Removal by Different Environmental Technologies

Optical Sensing of Copper and Its Removal by Different Environmental Technologies

Highly Sensitive and Selective Spiropyran-Based Sensor for Copper(II) Quantification

Femtomolar detection of Cu2+ ions in solution using super-Nernstian FET-sensor with a lipid monolayer as top-gate dielectric

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