scholarly journals Colorimetric Detection of Iron(III) Ion Based on 4-Aminothiophenol and Schiff Base Naphthalene-2-ol Modified Silver Nanoparticles

2019 ◽  
Vol 32 (2) ◽  
pp. 287-292
Author(s):  
Wachirawit Samerjai ◽  
Piyada Jittangprasert ◽  
Pan Tongraung
Keyword(s):  
Silver Nanoparticles ◽  
Schiff Base ◽  
Colorimetric Detection ◽  
Colour Change ◽  
Coordination Bond ◽  
Practical Application ◽  
Ligand Interaction ◽  
Drinking Water Samples ◽  
Metal Ligand ◽  
Selective Sensor

A facile, highly selective colorimetric sensor based on 4-aminothiophenol (4-ATP) and Schiff base naphthalene-2-ol (L) modified silver nanoparticles (4-ATP-L-AgNPs) for detection of Fe(III) ion in aqueous solution. The presence of Fe(III) ion induced the aggregation of AgNPs that caused the red-shift from 430 to 440 nm, through a cooperative metal-ligand interaction from the coordination bond between Fe(III) ion and functional groups on AgNPs surface resulting in a colour change from dark brown to dark yellow with increasing absorption at 365 nm. The absorbance at 365 nm is linear with the concentration of Fe(III) ion ranging from 9.0 × 10-6 M to 9.0 × 10-3 M with a correlation coefficient of 0.9991. The detection limit of the developed method was 7.9 × 10-6 M. The practical application of 4-ATP-L-AgNPs for selective sensor for Fe(III) ion in various drinking water samples were demonstrated.

Colorimetric Detection of Cr3+ in Aqueous Solution Based on Cofunctionalized Silver Nanoparticles Modified with 4-Nitrobenzenethiol and 4-Mercaptobenzoic Acid

NANO ◽  
2015 ◽  
Vol 10 (07) ◽  
pp. 1550095 ◽  
Author(s):  
Zhikun Zhang ◽  
Ying Zhou ◽  
Jing-Kui Yang ◽  
Peilong Wang ◽  
Xiaoou Su ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Color Change ◽  
Colorimetric Detection ◽  
Ligand Interaction ◽  
Bright Yellow ◽  
Colorimetric Response ◽  
Icp Ms ◽  
Highly Sensitive ◽  
Highly Sensitive Detection ◽  
Good Agreement

A new method has been proposed to realize the visual detection of Cr 3+ using 4-nitrobenzenethiol (4-NBT) and 4-mercaptobenzoic acid (4-MBA) modified silver nanoparticles ( AgNPs ). The presence of Cr 3+ induces the aggregation of AgNPs through cooperative metal–ligand interaction, resulting in a color change from bright yellow to purple. Consequently, Cr 3+ could be monitored by colorimetric response of AgNPs by a UV-Vis spectrophotometer or even naked eyes. We firstly used ethylene diamine tetraacetic acid (EDTA) as a masking agent to selectively detect Cr 3+, and other metal ions have little influence on the Cr 3+– AgNPs system. The cofunctionalized AgNPs exhibited a highly sensitive detection limit of Cr 3+, which is as low as 5 × 10-9 mol L-1, and the absorbance ratio (A600nm/A387nm) is linear with the concentration of Cr 3+ ranging from 5 × 10-9 mol L-1 to 2 × 10-6 mol L-1 with a coefficient of 0.993. Particularly, the sensor has been further evaluated to monitor the concentration of Cr 3+ in drinking water, the recovery was in good agreement with those obtained by ICP-MS, indicating that this proposed method is successfully applied in real samples.

scholarly journals Synthesis, Characterization, and Electrochemical Behaviour of Cobalt(II) and Nickel(II) Complexes with N2O2 Chelating Ligand 4,4′-(Biphenyl-4,4′-diyldinitrilo)dipentan-2-one

2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
Lakhdar Sibous ◽  
Embarek Bentouhami ◽  
Mustayeen Ahmed Khan
Keyword(s):  
Schiff Base ◽  
Mass Spectroscopy ◽  
Elemental Analysis ◽  
Electrochemical Behaviour ◽  
Absolute Ethanol ◽  
Molar Ratio ◽  
H Nmr ◽  
Chelating Ligand ◽  
Metal Ligand

4,4′-Diaminobiphenyl reacts with 2,4-pentanedione in absolute ethanol in a molar ratio 1 : 2 to form mainly the product of [1 + 2] condensation, 4,4′-(biphenyl-4,4′-diyldinitrilo)dipentan-2-one (H2L). The Schiff base was used as tetradentate chelating ligand to coordinate CoII and NiII chlorides leading to complexes where the ratio of metal ligand was found to be 2 : 1 or 2 : 2. All the synthesized products were characterized by elemental analysis, infrared, electronic, and mass spectroscopy, 1H NMR, and DSC. The electrochemical behaviour of the ligand and its complexes in DMF is also investigated.

Metal–ligand interaction of Ti–C6H6 complex size-selected by a 2-m long electrostatic hexapole field

2003 ◽  
Vol 369 (1-2) ◽  
pp. 55-59 ◽  
Author(s):  
Kohei Imura ◽  
Hiroshi Ohoyama ◽  
Toshio Kasai
Keyword(s):  
Ligand Interaction ◽  
Metal Ligand

Hapticity of asymmetric rhodium-allyl compounds in the light of real-space bonding indicators

2018 ◽  
Vol 233 (9-10) ◽  
pp. 615-626
Author(s):  
Stefan Mebs ◽  
Sabrina Imke Kalläne ◽  
Thomas Braun
Keyword(s):  
Real Space ◽  
Molecular Structures ◽  
Dft Study ◽  
Interaction Patterns ◽  
Ligand Interaction ◽  
Complex Metal ◽  
Allyl Compounds ◽  
Back Donation ◽  
Metal Ligand

Abstract Rhodium boryl complexes are valuable catalysts for hydro- or diboration reactions of alkenes, but can also react with ketones (R2C=O) and imines (R2C=NR′) giving rise to insertion products having formally Rh–R2C–O/NR′–B linkages. The resulting molecular structures, however, may show complex metal–ligand and ligand–ligand interaction patterns with often unclear metal–ligand connectivities (hapticities, ηn). In order to assign the correct hapticity in a set of asymmetric rhodium-allyl compounds with molecular structures indicating η1−5 bonding, a comprehensive DFT study was conducted. The study comprises determination of a variety of real-space bonding indicators derived from computed electron and pair densities according to the AIM, ELI-D, NCI, and DORI topological and surface approaches, which uncover the metal–ligand connectivties and suggest an asymmetric ligand–metal donation/metal–ligand back-donation framework according to the Dewar–Chatt–Duncanson model.

High-Performance Colorimetric Detection of Thiosulfate by Using Silver Nanoparticles for Smartphone-Based Analysis

ACS Sensors ◽  
2017 ◽  
Vol 2 (8) ◽  
pp. 1152-1159 ◽  
Author(s):  
Chen Dong ◽  
Zhuqing Wang ◽  
Yujie Zhang ◽  
Xuehua Ma ◽  
M. Zubair Iqbal ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
High Performance ◽  
Colorimetric Detection

A guanidine based bis Schiff base chemosensor for colorimetric detection of Hg(II) and fluorescent detection of Zn(II) ions

2019 ◽  
Vol 486 ◽  
pp. 733-741 ◽  
Author(s):  
Kalyani Rout ◽  
Amit Kumar Manna ◽  
Meman Sahu ◽  
Goutam Kumar Patra
Keyword(s):  
Schiff Base ◽  
Colorimetric Detection ◽  
Fluorescent Detection
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