A new rhodamine based chemodosimeter for Ni2+ with high sensitivity and selectivity

RSC Advances ◽  
2015 ◽  
Vol 5 (81) ◽  
pp. 66416-66419 ◽  
Author(s):  
Ivan Zhang ◽  
Yi Wang ◽  
Chao Wan ◽  
Zhen Xing ◽  
Wen Li ◽  
...  
Keyword(s):  
High Sensitivity ◽  
Colorimetric Sensing ◽  
Rhodamine Derivative ◽  
Sensitivity And Selectivity

A new spirocyclic rhodamine derivative for colorimetric sensing of Ni2+.

scholarly journals Colorimetric Detection of Sulfide Anions via Redox-Modulated Surface Chemistry and Morphology of Au-Hg Nanorods

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Xiaotian Zhu ◽  
Chang Liu ◽  
Jie Liu
Keyword(s):  
Surface Chemistry ◽  
Colorimetric Assay ◽  
Colorimetric Detection ◽  
High Sensitivity ◽  
Localized Surface Plasmon ◽  
Wavelength Shift ◽  
Colorimetric Sensing ◽  
Leather Industry ◽  
Colorimetric Response ◽  
Sensitivity And Selectivity

A new colorimetric assay for the detection of sulfide anions with high sensitivity and selectivity is reported, utilizing Au-Hg alloy nanorods (Au-HgNRs) as probe. Au-HgNRs were prepared by modifying gold nanorods (AuNRs) with reducing agent and mercury ions. In an aqueous solution with sulfide anions, the formation of mercuric sulfide due to redox reaction between the amalgams and sulfide anions greatly changed the surface chemistry and morphology of the Au-HgNRs, leading to a red shift of the localized surface plasmon resonance (LSPR) absorption peak, accompanied by a change in colorimetric response. A good linear relationship was obtained between the LSPR peak wavelength shift and concentration of sulfide anion in the range of 1 × 10−5−1 × 10−4 mol/L. The selectivity of this method has been investigated by other anions. The colorimetric sensing system successfully detected sulfide in wastewater from leather industry.

An unusual red-to-brown colorimetric sensing method for ultrasensitive silver(i) ion detection based on a non-aggregation of hyperbranched polyethylenimine derivative stabilized gold nanoparticles

The Analyst ◽  
2015 ◽  
Vol 140 (15) ◽  
pp. 5335-5343 ◽  
Author(s):  
Yi Liu ◽  
Yang Liu ◽  
Zhongfa Li ◽  
Junshen Liu ◽  
Li Xu ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Colorimetric Assay ◽  
High Sensitivity ◽  
Ion Detection ◽  
Colorimetric Sensing ◽  
Sensitivity And Selectivity

An unusual red-to-brown colorimetric assay for Ag+based on the anti-aggregation of AuNPs showed high sensitivity and selectivity.

scholarly journals Colorimetric detection of individual biothiols by tailor made reactions with silver nanoprisms

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Pei Li ◽  
Sang Mo Lee ◽  
Hyo Yong Kim ◽  
Soohyun Kim ◽  
Steve Park ◽  
...  
Keyword(s):  
Human Serum ◽  
Colorimetric Detection ◽  
Chloride Ion ◽  
High Sensitivity ◽  
Cost Effective ◽  
Colorimetric Sensing ◽  
Practical Applications ◽  
Silver Nanoprisms ◽  
Sensing Platform ◽  
Sensitivity And Selectivity

AbstractWe herein described a rapid, sensitive, and selective colorimetric sensing platform for biothiols in human serum, which relies on the dual functions of biothiols as anti-etching and aggregating agent for silver nanoprisms (AgNPRs). In principle, the target biothiols that bind to the surface of AgNPRs through Ag–S covalent interactions protect the AgNPRs from being etched by chloride ion (Cl−) in human serum, thus exhibiting the blue/purple color that is indicative of AgNPRs. On the other hand, the color of AgNPRs turned to yellow in the absence of biothiols or the presence of non-sulfur-containing amino acids, indicating the formation of small silver nanoparticles (AgNPs). Importantly, we found that individual biothiols (Hcy, Cys, and GSH) exert not only the anti-etching effect, but also the aggregating effect on AgNPRs, which can be modulated by simply tuning the pH conditions, and this consequently allows for the discriminative detection of each biothiol. Based on this simple and cost-effective strategy, we successfully determined the Hcy, Cys, and GSH in human serum with high sensitivity and selectivity within 10 min, demonstrating the diagnostic capability and potential in practical applications.

scholarly journals Styrene and Azo-Styrene Based Colorimetric Sensors for Highly Selective Detection of Cyanide

2017 ◽  
Vol 17 (2) ◽  
pp. 238
Author(s):  
Agustina Eka Prestiani ◽  
Bambang Purwono
Keyword(s):  
Color Change ◽  
Knoevenagel Condensation ◽  
Condensation Reaction ◽  
Aqueous Media ◽  
Colour Change ◽  
High Sensitivity ◽  
Colorimetric Sensing ◽  
Sensitivity And Selectivity ◽  
One Step ◽  
Knoevenagel Condensation Reaction

A novel styrene (1) and azo-styrene (2) based chemosensor from vanillin has been successfully synthesized. Sensor 1 was obtained by one step Knoevenagel condensation of Ultrasound method and sensor 2 by coupling diazo and Knoevenagel condensation reaction. Both of sensors showed high sensitivity and selectivity to detect CN- in aqueous media, even the presence of other anions, such as F-, Cl-, Br-, I-, CO32-, SO42-, H2PO4-, and AcO-. Colorimetric sensing of sensor 1 is inclined to be deprotonating of sensor binding site in the presence of cyanide and consequently improve the selectivity and sensitivity in sensing cyanide which displayed color change of sensor from yellowness to red-purple and then purple in 1 min. Sensor 2 exhibited chemodosimeter phenomenon which is caused by the nucleophilic addition of cyanide with a colour change from green to greenish-blue. The results enable to do an anion detection by a naked eye.

scholarly journals Colorimetric Sensing of Benzoyl Peroxide Based on the Emission Wavelength-Shift of CsPbBr3 Perovskite Nanocrystals

Chemosensors ◽  
2021 ◽  
Vol 9 (11) ◽  
pp. 319
Author(s):  
Li Zhang ◽  
Yimeng Zhu ◽  
Feiming Li ◽  
Linchun Zhang ◽  
Longjie You ◽  
...  
Keyword(s):  
Benzoyl Peroxide ◽  
Color Change ◽  
Fluorescence Emission ◽  
High Sensitivity ◽  
Emission Wavelength ◽  
Wavelength Shift ◽  
Colorimetric Sensing ◽  
Perovskite Nanocrystals ◽  
Sensitivity And Selectivity ◽  
Fluorescence Wavelength

Using the ionic salt characteristics of CsPbBr3 perovskite nanocrystals (CsPbBr3 NCs), the fluorescence wavelength of CsPbBr3−xIx NCs could be changed by the halogen exchange reaction between CsPbBr3 NCs and oleylammonium iodide (OLAM-I). Under the excitation of a 365 nm UV lamp and the increase of OLAM-I concentration, the content of iodine in CsPbBr3−xIx NCs increased, and the fluorescence emission wavelength showed a redshift from 511.6 nm to 593.4 nm, resulting in the fluorescence color change of CsPbBr3 NCs from green to orange-red. Since OLAM-I is a mild reducing agent and easily oxidized by benzoyl peroxide (BPO), a novel colorimetric sensing approach for BPO based on the fluorescence wavelength shift was established in this study. The linear relationship between the different wavelength shifts (Δλ) and the concentration of BPO (CBPO) is found to be in the range of 0 to 120 μmol L−1. The coefficient of alteration (R2) and the detection limit are 0.9933 and 0.13 μmol L−1 BPO, respectively. With this approach, the determination procedure of BPO in flour and noodle samples can be achieved in only a few minutes and exhibit high sensitivity and selectivity.

Schottky diodes based on 2D materials for environmental gas monitoring: a review on emerging trends, recent developments and future perspectives

2021 ◽  
Author(s):  
Minu Mathew ◽  
Chandra Sekhar Rout
Keyword(s):  
Gas Sensing ◽  
2D Materials ◽  
Schottky Diodes ◽  
High Sensitivity ◽  
Future Perspectives ◽  
Working Temperature ◽  
Emerging Trends ◽  
Gas Sensing Properties ◽  
Recent Developments ◽  
Sensitivity And Selectivity

This review details the fundamentals, working principles and recent developments of Schottky junctions based on 2D materials to emphasize their improved gas sensing properties including low working temperature, high sensitivity, and selectivity.

Lanthanide coordination polymer-based biosensor for citrate detection in urine

2019 ◽  
Vol 11 (10) ◽  
pp. 1405-1409 ◽  
Author(s):  
Haoshuang Shen ◽  
Baoxia Liu ◽  
Daosheng Liu ◽  
Xu Zhu ◽  
Xiuhua Wei ◽  
...  
Keyword(s):  
Coordination Polymer ◽  
High Sensitivity ◽  
Lanthanide Coordination Polymer ◽  
Sensitivity And Selectivity

GMP ligand based LCP sensor for Cit with high sensitivity and selectivity was constructed.

Luminescent nucleotide/Tb3+ coordination polymer for Fe(ii) detection in human serum

2020 ◽  
Vol 12 (8) ◽  
pp. 1122-1130
Author(s):  
Yan Liu ◽  
Lu-Lu Peng ◽  
Wei-Xiong Huang ◽  
Hui-Zhuo Zhou ◽  
Li Xu
Keyword(s):  
Coordination Polymer ◽  
Human Serum ◽  
Adenosine Triphosphate ◽  
High Sensitivity ◽  
Sensitivity And Selectivity ◽  
Bridge Ligand

A luminescent nucleotide/Tb3+ coordination polymer (CP) was synthesized using adenosine triphosphate (ATP) molecules as a bridge ligand and Phen as a sensitizer, which showed high sensitivity and selectivity for Fe2+.

Efficient chemosensors for toxic pollutants based on photoluminescent Zn(II) and Cd(II) metal-organic networks

2021 ◽  
Author(s):  
Luis David Rosales-Vazquez ◽  
Alejandro Dorazco-González ◽  
Victor Sanchez-Mendieta
Keyword(s):  
Optical Sensors ◽  
Three Dimensional ◽  
High Sensitivity ◽  
Environmental Research ◽  
Toxic Pollutants ◽  
Sensitivity And Selectivity ◽  
Metal Organic ◽  
Analytical Tools ◽  
Organic Networks

Optical sensors with high sensitivity and selectivity, as important analytical tools for chemical and environmental research, can be accomplished by straightforward synthesis of luminescent one-, two- and three-dimensional Zn(II) and...

Sign in / Sign up

Export Citation Format

Share Document