Fe3+ ion sensing characteristics of polydiphenylamine—electrochemical and spectroelectrochemical analysis

Suganandam, K.; Santhosh, P.; Sankarasubramanian, M.; Gopalan, A.; Vasudevan, T.; Lee, Kwang-Pill

doi:10.1016/j.snb.2004.06.005

Cited by 33 publications

(12 citation statements)

References 19 publications

(26 reference statements)

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“…Electrochemical determination of Cu(II) ions by a 4-formylphenylboronic acid modified gold electrode was also examined [15]. A self-assembled monolayer modified by 4-formylphenylboronic acid was formed on the gold electrode, which was applied for the determination of trace concentrations of Cu(II).Other examples have also been reported such as the measurement Mg(II) [16], Ca(II) [17,18], Fe(III) [19], Zn(II) [20,21], respectively. These previous studies have been shown high performance for selectivity of specific ion.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Complexation Ability Using a Sensor Electrode Chip Equipped with a Wireless Screening System

Isoda

Urushibara²,

Sato³

et al. 2012

Sensors

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We fabricated an electrode chip with a structure coated by an insulation layer that contains dispersed SiO2 adsorbent particles modified by an amino-group on a source-drain electrode. Voltage changes caused by chelate molecule adsorption onto electrode surfaces and by specific cation interactions were investigated. The detection of specific cations without the presence of chelate molecules on the free electrode was also examined. By comparing both sets of results the complexation ability of the studied chelate molecules onto the electrode was evaluated. Five pairs of source-drain electrodes(×8 arrays) were fabricated on a glass substrate of 20 × 30mm in size. The individual Au/Cr (1.0/0.1μm thickness) electrodes had widths of 50 μm and an inter-electrode interval of 100μm.The fabricated source-drain electrodes were further coated with an insulation layer comprising a porous SiO2 particle modified amino-group to adsorb the chelate molecules. The electrode chip was equipped with a handy-type sensor signal analyzer that was mounted on an amplifier circuit using a Miniship™ or a system in a packaged LSI device. For electrode surfaces containing different adsorbed chelate molecules an increase in the sensor voltage depended on a combination of host-guest reactions and generally decreased in the following order:5,10,15,20-tetrakis(N-methylpyridinium-4-yl)-21H,23H-porphine, tetrakis(p-toluenesulfonate) (TMPyP)as a Cu2+chelator and Cu2+>2-nitroso-5-[N-n-propyl-N-(3-sulfopropyl)amino]phenol(nitroso-PSAP) as an Fe2+chelator and Fe2+>4,7-diphenyl-1,10-phenanthrolinedisulfonic acid, disodium salt (BPDSA) as an Fe2+chelatorand Fe2+>3-[3-(2,4-dimethylphenylcarbamoyl)-2-hydroxynaphthalene-1-yl-azo]-4-hydroxybenzenesulfonic acid, sodium salt (XB-1) as a Mg2+chelator and Mg2+>2,9-dimethyl-4,7-diphenyl-1,10-phenanthrolinedisulfonic acid, disodium salt (BCIDSA) as a Cu2+chelator and Cu2+, respectively. In contrast, for the electrode surfaces with adsorbed O,O′-bis(2-aminoethyl)ethyleneglycol-N,N,N′,N′-tetraacetic acid (GEDTA) or O,O′-bis(2-aminophenyl)ethyleneglycol-N,N,N′,N′-tetraacetic acid, tetrapotassium salt, hydrate (BAPTA) as a Ca2+chelator no increase in the detection voltage was found for all the electrode tests conducted in the presence of Ca2+.To determine the differences in electrode detection, molecular orbital (MO) calculations of the chelate molecules and surface molecular modeling of the adsorbents were carried out. In accordance with frontier orbital theory, the lowest unoccupied MO (LUMO) of the chelate molecules can accept two lone pair electrons at the highest occupied MO (HOMO) of the amino group on the model surface structure of the SiO2 particle. As a result, a good correlation was obtained between the LUMO-HOMO difference and the ion response of all the electrodes tested. Based on the results obtained, the order of adsorbed chelate molecules on adsorption particles reflects the different metal ion detection abilities of the electrode chips.

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Section: Discussionmentioning

confidence: 99%

Evaluation of Complexation Ability Using a Sensor Electrode Chip Equipped with a Wireless Screening System

Isoda

Urushibara²,

Sato³

et al. 2012

Sensors

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“…Suganandam et al 283 reported platinum/indium tin oxide coated glass (ITO) electrode deposited by the polydiphenylamine (PDPA) 218 (Fig. 182) for the ferric ion detection in the aqueous acidic medium.…”

Section: Polydiphenylamine Based Fe 3+ Sensormentioning

confidence: 99%

Optical sensor: a promising strategy for environmental and biomedical monitoring of ionic species

2015

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There is fast growing research on designing and improving the metal recognition methodologies in the ecosystems and biological media. The fluorescent based techniques proved a mile stones for non-invasive metal sensation and quantification in the multichannel environment. Metals as the natural components of Earth's crust are generally present in trace concentrations in the environmental samples where the humic substances have complexation affinity toward them. Iron, zinc and copper are the 1 st , 2 nd and 3 rd adequate elements indispensable to the body in trace playing the crucial roles in many biological processes. However, the unregulated amounts either as excess or deficient may exacerbate deterioration to the vital organs and triggered the progression of complications. Beside these three essential elements, mercury is widely considered to be one of the most hazardous pollutants and highly dangerous elements due to its recognized accumulative and toxic characters in the environment and the ecosystem. In the current scenario, we have tried to summarize the maximum amount of recently developed fluorescent signaling materials for the Cu 2+ , Fe 2+ / Fe 3+ , Zn 2+ and Hg 2+ . The spectral shifting in the molecules on metal chelation, mode of complexation and stoichiometries of resulting adducts have been discussed in detail. Furthermore, the molecules which have been reported as intracellular metal detector via bioimaging are specifically highlighted that might be useful for the design and development of cell viable and membrane permeable molecular probes in the future perspective.

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“…Spectroelectrochemistry is a multiresponse technique that provides simultaneous electrochemical and spectroscopic information in a unique experiment. It shows the advantages of both techniques and offers very unique possibilities in the study of a huge variety of chemical systems [29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Spectroelectrochemical monitoring of contaminants during the electrochemical filtration process using free-standing carbon nanotube filters

Ibáñez

Gómez

Vallés

et al. 2018

Electrochimica Acta

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Real-time process monitoring is still relatively scarce but is fundamental to provide in-situ information about different chemical and electrochemical processes. Particularly, electrochemical filtration has received growing attention in recent years due to the wide range of applications in which it can be successfully employed. Electrochemical removal is considered as an attractive methodology for the treatment of wastewater due to its efficiency in the removal of a huge number of contaminants. In this work, the development of a new device based on the use of UV-vis bare optical fibers in long optical pathway configuration allows us to monitor continuously the electrochemical degradation process during the filtration of different compounds. Spectroelectrochemistry additionally supplies quantitative information allowing us to calculate the efficiency of the electrochemical filtration process. The material selected to fabricate the electrochemical filter was single-walled carbon nanotubes that display not only high physical and chemical stability, but also high electrical conductivity. Therefore, the combination of electrochemical degradation methods, free-standing single-walled carbon nanotube filters and operando spectroelectrochemical techniques makes this outstanding device very interesting in the study of different molecules. As proof of concept, three different systems have been studied to validate the cell and demonstrate the good performance of the spectroelectrochemical device: otolidine (reference system), indigo carmine (organic dye), and 4-nitrophenol (hazardous pollutant).

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Fe3+ ion sensing characteristics of polydiphenylamine—electrochemical and spectroelectrochemical analysis

Cited by 33 publications

References 19 publications

Evaluation of Complexation Ability Using a Sensor Electrode Chip Equipped with a Wireless Screening System

Evaluation of Complexation Ability Using a Sensor Electrode Chip Equipped with a Wireless Screening System

Optical sensor: a promising strategy for environmental and biomedical monitoring of ionic species

Spectroelectrochemical monitoring of contaminants during the electrochemical filtration process using free-standing carbon nanotube filters

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