Recent Development of Supramolecular Sensors Constructed by Hybridization of Organic Macrocycles with Nanomaterials

2020 ◽  
Vol 24 (3) ◽  
pp. 265-290 ◽  
Author(s):  
Yong-Yi Zhao ◽  
Jian-Mei Yang ◽  
Xian-Yi Jin ◽  
Hang Cong ◽  
Qing-Mei Ge ◽  
...  
Keyword(s):  
Optical Sensors ◽  
Research Field ◽  
Superior Performance ◽  
Macrocyclic Compounds ◽  
Detection Range ◽  
Lower Detection Limit ◽  
Lower Detection ◽  
Sensitivity And Selectivity ◽  
Recognition And Response ◽  
Macrocyclic Molecules

Macrocyclic compounds have attracted tremendous attention for their superior performance in supramolecular recognition, catalysis, and host-guest interaction. With these admirable properties, macrocyclic compounds were used as modifiers for enhancing the sensitivity and selectivity of electrodes and optical sensors. The classic macrocyclic compounds, including crown ethers, cyclodextrins, calixarenes, cucurbiturils, and pillararenes, were employed as receptors for electrochemical and optical sensors to develop new analytical methods with the wilder detection range, lower detection limit, and better tolerance of interference. Macrocyclic molecules functionalized with nanomaterials, the small entities with dimensions in the nanoscale, realized the versatility and diversification of the nano-hybrid materials, which improved the capabilities of recognition and response with the combining characteristics of two components. Herein, this review focused on the development in the research field of hybridization of organic macrocycles with nanoparticles and their applications for chemosensors, aiming at both existing researchers in the field and who would like to enter into the research.

scholarly journals Schiff Base Functionalized 1,2,4-Triazole and Pyrene Derivatives for Selective and Sensitive Detection of Cu2+ in the Mixed Organic- Aqueous Media

2021 ◽  
Author(s):  
Nam Gyu Choi ◽  
Balasaheb D. Vanjare ◽  
Prasad G. Mahajan ◽  
Rajendran Nagarajan ◽  
Hyang Im Ryoo ◽  
...  
Keyword(s):  
Schiff Base ◽  
Colorimetric Detection ◽  
Aqueous Media ◽  
Stoichiometric Ratio ◽  
Naked Eye ◽  
Lower Detection Limit ◽  
Lower Detection ◽  
Pyrene Derivatives ◽  
Sensitivity And Selectivity

Abstract We have prepared Schiff base functionalized 1,2,4-Triazole and Pyrene derivatives for selective, sensitive, and naked eye colorimetric detection of Cu2+ in the mixed organic- aqueous media. Amongst the 18 different metal ions studied for absorption and fluorescence titration, only Cu2+ ion encourages the modification in spectral properties of Schiff base functionalized 1,2,4-Triazole and Pyrene Probe. The stoichiometric ratio of the Probe-Cu2+ complex was determined to be 2:1 according to Job’s plot. The lower detection limit estimated for Cu2+ is 0.234 nM which shows excellent sensitivity and selectivity of the present analytical method towards detection of Cu2+ ion in the mixed organic-aqueous media. The present approach has been successfully utilized for the quantitative determination of Cu2+ ion from environmental aqueous solution.

scholarly journals Effects of modified fly ash doped carbon paste electrodes and metal film electrodes on the determination of trace cadmium(ii) by anodic stripping voltammetry

RSC Advances ◽  
2021 ◽  
Vol 11 (28) ◽  
pp. 17240-17248
Author(s):  
Jinying Hou ◽  
Yuping Fan ◽  
Xiaomin Ma ◽  
Xianshu Dong ◽  
Suling Yao
Keyword(s):  
Anodic Stripping Voltammetry ◽  
Stripping Voltammetry ◽  
Carbon Paste ◽  
Detection Range ◽  
Carbon Paste Electrodes ◽  
Lower Detection Limit ◽  
Lower Detection ◽  
Trace Cadmium ◽  
Modified Fly Ash

A wider detection range and a lower detection limit were obtained due to the introduction of CTAB and Bi.

Surface molecular imprinting on CdTe quantum dots for fluorescence sensing of 4-nitrophenol

2016 ◽  
Vol 8 (10) ◽  
pp. 2226-2232 ◽  
Author(s):  
Linye Jiang ◽  
Haijian Liu ◽  
Ming Li ◽  
Yue Xing ◽  
Xueqin Ren
Keyword(s):  
Quantum Dots ◽  
Detection Limit ◽  
Molecular Imprinting ◽  
Fluorescent Sensor ◽  
High Sensitivity ◽  
Surface Molecular Imprinting ◽  
Fluorescence Sensing ◽  
Lower Detection Limit ◽  
Lower Detection ◽  
Sensitivity And Selectivity

The developed fluorescent sensor provides high sensitivity and selectivity and a lower detection limit than previously developed sensors.

scholarly journals PCN-222@g-C3N4 cathodic materials for “signal-off” photoelectrochemical sensing of kanamycin sulfate

RSC Advances ◽  
2021 ◽  
Vol 11 (45) ◽  
pp. 28320-28325
Author(s):  
Wenxia Dong ◽  
Zhongping Li ◽  
Wen Wen ◽  
Sisi Feng ◽  
Yuanjian Zhang ◽  
...  
Keyword(s):  
Detection Limit ◽  
Active Material ◽  
Detection Range ◽  
Cathodic Materials ◽  
Lower Detection Limit ◽  
Kanamycin Sulfate ◽  
Lower Detection

The PCN-222@g-C3N4 was firstly used as a photoelectrically active material for the detection of kanamycin sulfate; The sensor has lower detection limit and the broad detection range for kanamycin sulfate.

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...

A novel 3D Zn-coordination polymer based on a multiresponsive fluorescent sensor demonstrating outstanding sensitivities and selectivities for the efficient detection of multiple analytes

2021 ◽  
Author(s):  
Yu Liu ◽  
Yan Wang ◽  
Xiao-Sa Zhang ◽  
Yu-Shu Sheng ◽  
Wen-Ze Li ◽  
...  
Keyword(s):  
Detection Limit ◽  
Coordination Polymer ◽  
Fluorescent Sensor ◽  
Lower Detection Limit ◽  
Ph Values ◽  
Efficient Detection ◽  
Wide Range ◽  
Lower Detection ◽  
Multiple Analytes

A Zn-CP exhibits remarkable fluorescence behaviours and stability in a wide range of pH values. It can become an outstanding candidate in the selective sensing of Fe3+, Mg2+, Cr2O72−, MnO4−, NB and NM at a lower detection limit.

scholarly journals Portable smartphone-integrated paper sensors for fluorescence detection of As(III) in groundwater

2020 ◽  
Vol 7 (12) ◽  
pp. 201500
Author(s):  
Sha Liu ◽  
Yong Li ◽  
Chao Yang ◽  
Liqiang Lu ◽  
Yulun Nie ◽  
...  
Keyword(s):  
Environmental Problem ◽  
Visual Detection ◽  
High Sensitivity ◽  
Integration System ◽  
Detection Range ◽  
Sensitivity And Selectivity ◽  
Toxic Metalloid ◽  
Interfering Ions ◽  
Cu Nanoclusters

Arsenic contamination in groundwater is a supreme environmental problem, and levels of this toxic metalloid must be strictly monitored by a portable, sensitive and selective analytical device. Herein, a new system of smartphone-integrated paper sensors with Cu nanoclusters was established for the effective detection of As(III) in groundwater. For the integration system, the fluorescence emissive peak of Cu nanoclusters at 600 nm decreased gradually with increasing As(III) addition. Meanwhile, the fluorescence colour also changed from orange to colourless, and the detection limit was determined as 2.93 nM (0.22 ppb) in a wide detection range. The interfering ions also cannot influence the detection selectivity of As(III). Furthermore, the portable paper sensors based on Cu nanoclusters were fabricated for visual detection of As(III) in groundwater. The quantitative determination of As(III) in natural groundwater has also been accomplished with the aid of a common smartphone. Our work has provided a portable and on-site detection technique toward As(III) in groundwater with high sensitivity and selectivity.

scholarly journals Rapid Method Using Two Microbial Enzymes for Detection of l-Abrine in Food as a Marker for the Toxic Protein Abrin

2014 ◽  
Vol 81 (5) ◽  
pp. 1610-1615 ◽  
Author(s):  
Anthony G. Dodge ◽  
Kelvin Carrasquillo ◽  
Luis Rivera ◽  
Lei Xu ◽  
Lawrence P. Wackett ◽  
...  
Keyword(s):  
Sample Preparation ◽  
Visual Detection ◽  
Food Samples ◽  
Content Type ◽  
Toxic Protein ◽  
Beverage Samples ◽  
Lower Detection Limit ◽  
Lower Detection ◽  
Complex Sample ◽  
Food And Beverage

ABSTRACTAbrin is a toxic protein produced by the ornamental plantAbrus precatorius, and it is of concern as a biothreat agent. The small coextracting moleculeN-methyl-l-tryptophan (l-abrine) is specific to members of the genusAbrusand thus can be used as a marker for the presence or ingestion of abrin. Current methods for the detection of abrin orl-abrine in foods and other matrices require complex sample preparation and expensive instrumentation. To develop a fast and portable method for the detection ofl-abrine in beverages and foods, theEscherichia coliproteinsN-methyltryptophan oxidase (MTOX) and tryptophanase were expressed and purified. The two enzymes jointly degradedl-abrine to products that included ammonia and indole, and colorimetric assays for the detection of those analytes in beverage and food samples were evaluated. An indole assay using a modified version of Ehrlich's/Kovac's reagent was more sensitive and less subject to negative interferences from components in the samples than the Berthelot ammonia assay. The two enzymes were added into food and beverage samples spiked withl-abrine, and indole was detected as a degradation product, with the visual lower detection limit being 2.5 to 10.0 μM (∼0.6 to 2.2 ppm)l-abrine in the samples tested. Results could be obtained in as little as 15 min. Sample preparation was limited to pH adjustment of some samples. Visual detection was found to be about as sensitive as detection with a spectrophotometer, especially in milk-based matrices.

Glucose Biosensor Based on Glucose Oxidase-Horseradish Peroxidase/Multiporous Tin Oxide (SnO2) Modified Electrode

2021 ◽  
Vol 21 (5) ◽  
pp. 3059-3064
Author(s):  
A. K. M. Kafi ◽  
Aizam Bin Kasri ◽  
Rajan Jose
Keyword(s):  
Horseradish Peroxidase ◽  
Glucose Oxidase ◽  
Tin Oxide ◽  
Electrode Potential ◽  
High Sensitivity ◽  
Glucose Biosensor ◽  
Glucose Detection ◽  
Lower Detection Limit ◽  
Vis Spectroscopy ◽  
Lower Detection

The fabrication of a network of glucose oxidase-horseradish peroxidase/tin oxide (GOx-HRP/SnO2), immobilized onto a glassy carbon electrode (GCE) and its utilization as a biosensor for glucose detection is reported. The network established with GOx-HRP/SnO2 possess high sensitivity and stability by performing the electrocatalytic features in the sensing of glucose. The turbidity of fabrication had been scanned and analyzed using UV-vis spectroscopy. The morphology and composition of the fabricated GOx-HRP/SnO2 networks were characterized by scanning electron microscopy (SEM). Cyclic voltammetry and amperometry were employed to study the electrochemical properties of the proposed biosensor. The effect of applied electrode potential and pH were systemically investigated. The biosensor responds to glucose at work potential values between −400 mV, and exhibited a lower detection limit (0.025 mM) and long linear range (0.25 to 7.0 mM), and was resistant to common interferences.

Sign in / Sign up

Export Citation Format

Share Document