Recent developments on optical and electrochemical sensing of copper(II) ion based on transition metal complexes

Ramdass, Arumugam; Sathish, Veerasamy; Babu, Eththilu; Velayudham, Murugesan; Thanasekaran, Pounraj; Rajagopal, Seenivasan

doi:10.1016/j.ccr.2017.06.002

Cited by 100 publications

(33 citation statements)

References 163 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Herein, we report on the use of four tricarbonylrhenium(I) complexes containing hydroxyl and imine group of 2,2’‐bipyridine ligands 1–4 where the ligand functions as the binding site and rhenium center acts as the signaling unit. In our earlier studies, we have shown that these compounds acted as optical sensors for sensing of cations ,. Now, the sensitivity and selectivity of 1–4 towards F – ions over other anions is found via deprotonation of the phenolic OH group with a 1:1 complex formation, as demonstrated by UV‐vis absorption, phosphorescence and 1 H NMR spectral titration analyses as well as naked eye detection.…”

Section: Introductionmentioning

confidence: 89%

Phosphorescence “Turn‐On” Sensing of Anions by Rhenium(I) Schiff‐Base Complexes

Ramdass¹,

Sathish²,

Velayudham

et al. 2018

ChemistrySelect

Self Cite

View full text Add to dashboard Cite

Monometallic rhenium(I) polypyridine complexes (1‐4) having imine functionalized phenol moieties based on 2,2’‐bipyridine ligands L1‐L4 have been used as phosphorescent turn‐on sensors for anions. These complexes showed various degrees of response to F–, CN–, CH3COO– and H2PO4– anions in the UV‐vis absorption spectra and displayed a phosphorescence “turn‐on” sensor for F–, CN–, CH3COO– and H2PO4– anions with different sensitivities. There is a substantial increase in emission intensity, quantum yield and luminescence lifetime is observed through deprotonation of the phenolic OH proton in 1–4 upon the addition of these anions. The signaling mechanism relies on the formation of acid‐base equilibrium through a set of well‐defined isosbestic points between 1–4 and anions, giving high equilibrium constants in the order F–>CN–>CH3COO–>H2PO4– with a 1:1 binding stoichiometry. The selectivity and sensitivity towards F− were explained in terms of H‐bonding interaction between 1–4 and F−, then deprotonation of 1–4 by 1H NMR titration analysis. The excellent selectivity of 1–4 for F– is ascribed to the fitness in the acidity of its phenolic OH‐group, which is able to discern the subtle difference in the affinity of F–, CN–, CH3COO– and H2PO4–ions to OH proton of phenolic group.

show abstract

Section: Introductionmentioning

confidence: 89%

Phosphorescence “Turn‐On” Sensing of Anions by Rhenium(I) Schiff‐Base Complexes

Ramdass¹,

Sathish²,

Velayudham

et al. 2018

ChemistrySelect

Self Cite

View full text Add to dashboard Cite

show abstract

“…The development of analytical methods for the selective detection and visualization of Cu(II) is significant. The common methods for the detection of Cu(II), as for Cr(VI), include liquid chromatography, electrochemical detection, spectrophotometry, solid-phase extraction coupled with atomic absorption spectroscopy, potentiometric techniques, X-ray fluorescence, atomic emission spectroscopy, and inductively coupled plasma mass spectrometry [104,105]. According to Ramanjaneyulu et al [106,107], the existing reagents for the photometric determination of Cu permit the detection of 0.025-30 μg/mL Cu.…”

Section: Cu Detection Methodsmentioning

confidence: 99%

Pollution of Water Sources from Agricultural and Industrial Effluents: Special Attention to NO₃ˉ, Cr(VI), and Cu(II)

Breida¹,

Younssi²,

Ouammou³

et al. 2020

Water Chemistry

View full text Add to dashboard Cite

One of the most important challenges facing humanity today is to conserve and sustain water resources (either surface water or groundwater). This challenge became more pronounced with the increase of urban, agricultural, and industrial activities that discharge a considerable amount of wastewater. Therefore, the preservation of water sources from pollutants is a major concern, shared by all, public, industrial, scientific, researchers, and decision-makers. This chapter analyzes in more detail the pollution and pollutants caused by agricultural and industrial activities. Particular attention is given to pollution via nitrogen and heavy metals (NO 3 − , Cr(VI), and Cu(II)) in either international or national level. The effect of these pollutants on human health and environment, their standards/regulations, and the different current methods used for their detection and treatment are all discussed in the chapter.

show abstract

“…Although these analytical methods can be extremely sensitive, they require complex instrumentations, usually need sample pre‐treatments, and are quite expensive and time‐consuming. As an alternative to conventional methods, optical chemical probes based on different principles have been studied and proposed for application in environmental science, biology and medicine [22–24] …”

Section: Introductionmentioning

confidence: 99%

Detection of Copper(II) in Water by Methylene Blue Derivatives

et al. 2020

View full text Add to dashboard Cite

Two novel phenothiazin‐5‐ium derivatives bearing cyclam moieties (3 a+ and 3 b+) were synthesized and investigated as Cu2+ sensors. Both ligands show intense spectral changes in the presence of Cu2+ in aqueous solutions. The high molar extinction coefficient of the chromophore allows both naked eye detection and spectrophotometric quantitative determination of the cation at a micromolar‐concentration scale. 3 a+ was found to outperform 3 b+, showing negligible spectral changes in the presence of excesses of other metal cations.

show abstract

Recent developments on optical and electrochemical sensing of copper(II) ion based on transition metal complexes

Cited by 100 publications

References 163 publications

Phosphorescence “Turn‐On” Sensing of Anions by Rhenium(I) Schiff‐Base Complexes

Phosphorescence “Turn‐On” Sensing of Anions by Rhenium(I) Schiff‐Base Complexes

Pollution of Water Sources from Agricultural and Industrial Effluents: Special Attention to NO₃ˉ, Cr(VI), and Cu(II)

Detection of Copper(II) in Water by Methylene Blue Derivatives

Contact Info

Product

Resources

About

Recent developments on optical and electrochemical sensing of copper(II) ion based on transition metal complexes

Cited by 100 publications

References 163 publications

Phosphorescence “Turn‐On” Sensing of Anions by Rhenium(I) Schiff‐Base Complexes

Phosphorescence “Turn‐On” Sensing of Anions by Rhenium(I) Schiff‐Base Complexes

Pollution of Water Sources from Agricultural and Industrial Effluents: Special Attention to NO3ˉ, Cr(VI), and Cu(II)

Detection of Copper(II) in Water by Methylene Blue Derivatives

Contact Info

Product

Resources

About

Pollution of Water Sources from Agricultural and Industrial Effluents: Special Attention to NO₃ˉ, Cr(VI), and Cu(II)