Synthesis, characterization, aggregation and electrochemical properties of peripheral octa-2-{[4-(2-benzylphenoxy]benzyl]thio} ethoxy group substituted cobalt(II) phthalocyanine

We were reported here, the synthesis, characterization, aggregation and electrochemical properties of 4,5-bis(2-{[4-(2- benzyl)phenoxy)benzyl]thio}ethoxy)phthalonitrile and 2,3,9,16, 17,23,24-octa[(2-{[4-(2-benzyl)phenoxy)benzyl]thio}ethoxy)] phthalociyaninatocobalt(II). CoPc were prepared by the reaction of 4,5-bis(2-{[4-(2-benzyl)phenoxy)benzyl]thio}ethoxy) phthalonitrile with the corresponding anhydrous metal salt in n-pentanol and DBU. The structures of the original compounds were identified by using elemental analysis, 1 H-NMR, 13C-NMR, IR, mass and UVvis spectroscopic data. Electrochemical redox characteristics of the compounds were determined by electroanalytical techniques such as cyclic voltammetry, square wave voltammetry. The aggregation tendencies and electrochemical redox properties of all phthalocyanines were investigated on the basis of central metal, solvent medium and substituent effects, using UV-Vis spectral.

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Green Synthesis and Electrochemical Properties of Mono- and Dimers Derived from Phenylaminoisoquinolinequinones

Molecules ◽

10.3390/molecules24234378 ◽

2019 ◽

Vol 24 (23) ◽

pp. 4378 ◽

Cited By ~ 2

Author(s):

Juana Andrea Ibacache ◽

Jaime A. Valderrama ◽

Judith Faúndes ◽

Alex Danimann ◽

Francisco J. Recio ◽

...

Keyword(s):

Green Synthesis ◽

Electrochemical Properties ◽

Square Wave Voltammetry ◽

Oxidation Process ◽

Oxidative Amination ◽

One Pot ◽

Wave Voltammetry ◽

Controlled Potential ◽

The One ◽

Controlled Potential Coulometry

In the search for new quinoid compounds endowed with potential anticancer activity, the synthesis of novel heterodimers containing the cytotoxic 7-phenylaminoisoquinolinequinone and 2-phenylaminonaphthoquinone pharmacophores, connected through methylene and ethylene spacers, is reported. The heterodimers were prepared from their respective isoquinoline and naphthoquinones and 4,4′-diaminodiphenyl alkenes. The access to the target heterodimers and their corresponding monomers was performed both through oxidative amination reactions assisted by ultrasound and CeCl3·7H2O catalysis “in water”. This eco-friendly procedure was successfully extended to the one-pot synthesis of homodimers derived from the 7-phenylaminoisoquinolinequinone pharmacophore. The electrochemical properties of the monomers and dimers were determined by cyclic and square wave voltammetry. The number of electrons transferred during the oxidation process, associated to the redox potential EI1/2, was determined by controlled potential coulometry.

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Voltammetric methods of reboxetine analysis and the mechanism of its electrode reactions

Open Chemistry ◽

10.2478/s11532-013-0213-8 ◽

2013 ◽

Vol 11 (5) ◽

pp. 706-716 ◽

Cited By ~ 2

Author(s):

Deniz Altunöz-Erdoğan ◽

Nevin Erk ◽

Esma Kılıç

Keyword(s):

Protein Binding ◽

Square Wave Voltammetry ◽

Limit Of Detection ◽

Cathodic Peak ◽

Glassy Carbon Electrodes ◽

Wave Voltammetry ◽

Diffusion Controlled ◽

Electrochemical Redox ◽

Voltammetric Methods ◽

Drug Protein Binding

AbstractReboxetine (RBX) electrochemical redox behavior at hanging mercury drop (HMDE) and glassy carbon electrodes (GCE) was studied in various pH Britton-Robinson universal buffers using cyclic voltammetry and square-wave voltammetry. RBX was reduced at the HMDE and oxidized at the GCE with reversible adsorption controlled and irreversible diffusion controlled processes respectively. The anodic peak is due to the amine and the cathodic peak may correspond to oxygen protonation. An oxidation reaction mechanism is proposed. The linear relation between peak currents and RBX concentration allowed simple, sensitive, precise and inexpensive voltammetric procedures to be developed. The limit of detection was 0.04 µM RBX. The procedures were successfully applied to human urine and RBX tablet assay. Therapeutic RBX concentrations in human serum were not detected due to strong drug-protein binding. Using bovine serum albumin, the methods were used to investigate the effect of serum protein binding on RBX determination.

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Synthesis and electrochemical properties of bis(octacyanophthalocyaninato)neodymium(III) complex

Journal of Porphyrins and Phthalocyanines ◽

10.1142/s1088424605000101 ◽

2005 ◽

Vol 09 (01) ◽

pp. 54-58 ◽

Cited By ~ 5

Author(s):

Tatsuya Yonekura ◽

Takeo Ohsaka ◽

Fusao Kitamura ◽

Koichi Tokuda

Keyword(s):

Cyclic Voltammetry ◽

Electrochemical Properties ◽

Electrochemical Behavior ◽

Redox Reactions ◽

Square Wave Voltammetry ◽

Cyano Group ◽

Cyclic Voltammogram ◽

Redox Potentials ◽

Strong Electron ◽

Wave Voltammetry

The bis(octacyanophthalocyaninato)neodymium(III) was synthesized and its electrochemical behavior in N,N-dimethylformamide ( DMF ) was investigated by cyclic voltammetry (CV) and square wave voltammetry (SWV). Multiple redox reactions were observed on the cyclic voltammogram, although the voltammetric feature was complicated due to aggregation. With the aid of SWV, it was concluded that the redox potentials of the complex positively shifted by about 700 mV compared with potentials of the unsubstituted complex, which was ascribed to the strong electron-withdrawn effect of the substituted cyano group.

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Electrochemical properties of yttrium on W and Pb electrodes in LiCl–KCl eutectic melts

RSC Advances ◽

10.1039/c9ra05496k ◽

2019 ◽

Vol 9 (46) ◽

pp. 26718-26728 ◽

Cited By ~ 3

Author(s):

Wei Han ◽

Wenlong Li ◽

Jiazhuang Chen ◽

Mei Li ◽

Zhuyao Li ◽

...

Keyword(s):

Cyclic Voltammetry ◽

Electrochemical Properties ◽

Linear Polarization ◽

Square Wave Voltammetry ◽

Square Wave ◽

Wave Voltammetry

Cyclic voltammetry, square wave voltammetry, linear polarization, chronopotentiometry and chronoamperometry were performed to investigate the electrochemical properties of Y(iii) on W and Pb electrodes in LiCl–KCl eutectic melts.

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Novel phthalocyanines containing azo chromophores; synthesis, characterization, photophysical, and electrochemical properties

Journal of Porphyrins and Phthalocyanines ◽

10.1142/s1088424618500050 ◽

2018 ◽

Vol 22 (01n03) ◽

pp. 198-206 ◽

Cited By ~ 3

Author(s):

Ebru Özkan Garip ◽

Mukaddes Özçeşmeci ◽

Ilgın Nar ◽

İbrahim Özçeşmeci ◽

Esin Hamuryudan

Keyword(s):

Electrochemical Properties ◽

Square Wave Voltammetry ◽

Photophysical Properties ◽

Visible Spectroscopy ◽

Metal Free ◽

Tert Butyl ◽

Wave Voltammetry ◽

Elemental Analyses ◽

Aromatic Nitro ◽

New Compounds

A series of novel metal-free and zinc (II), copper (II), cobalt (II), and manganese (III) phthalocyanine complexes bearing peripheral 2,6-dimethyl-4-(4-tert-butyl-phenylazo)phenoxy units have been synthesized. Novel phthalonitrile derivative required for the preparation of these phthalocyanine complexes was prepared by a base-catalyzed nucleophilic aromatic nitro displacement of 4-nitrophthalonitrile with 2,6-dimethyl-4-(4-tert-butyl-phenylazo)phenol. The structures of these new compounds were characterized by using elemental analyses, proton and carbon nuclear magnetic resonance, Fourier transform infrared spectroscopy, ultraviolet–visible spectroscopy and mass spectrometry. The photophysical properties of metal-free and zinc(II) phthalocyanines were studied in tetrahydrofuran. The electrochemical properties of the phthalocyanine complexes were investigated by cyclic and square wave voltammetry.

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SIMULTANEOUS ARSENIC (III) AND LEAD (II) DETECTION FROM AQUEOUS SOLUTION BY ANODIC STRIPPING SQUARE-WAVE VOLTAMMETRY

Environmental Engineering and Management Journal ◽

10.30638/eemj.2014.259 ◽

2014 ◽

Vol 13 (9) ◽

pp. 2317-2323 ◽

Cited By ~ 3

Author(s):

Florica Manea ◽

Anamaria Baciu ◽

Aniela Pop ◽

Joop Schoonman

Keyword(s):

Aqueous Solution ◽

Square Wave Voltammetry ◽

Square Wave ◽

Wave Voltammetry ◽

Anodic Stripping

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Facile and Fast Detection of Genistein in Derris scandens by Square Wave Voltammetry using a Cobalt(II) Phthalocyanine-Modified Screen-Printed Electrochemical Sensor

Current Analytical Chemistry ◽

10.2174/1573411014666180521091053 ◽

2020 ◽

Vol 16 (3) ◽

pp. 341-348

Author(s):

Surinya Traipop ◽

Suchada Chuanuwatanakul ◽

Orawon Chailapakul ◽

Eakkasit Punrat

Keyword(s):

Electrochemical Sensor ◽

Square Wave Voltammetry ◽

Silver Chloride ◽

Reference Electrode ◽

High Sensitivity ◽

Plastic Substrate ◽

Fast Analysis ◽

Square Wave ◽

Wave Voltammetry ◽

Screen Printed

Background: Recently, Derris scandens, a Thai herbal medicine with anti-inflammatory activity, is widely used as beverage and supplementary food. When the traditional medicine is a choice for health therapy, the simple and reliable equipment is required to control the suitable consuming amount of the active component. Objective: To develop the electrochemical sensor for genistein determination in Derris scandens with high sensitivity and rapid operation. Methods: An in-house screen-printed electrochemical sensor consisting of a three-electrode system was developed for genistein determination. A silver/silver chloride (Ag/AgCl) reference electrode, a carbon counter electrode and a carbon working electrode were prepared on a 0.3-mm-thick plastic substrate by the screen-printing technique using conductive ink. The dimensions of each sensor were 2.5×1.0 cm. Only 50 µL of sample solution was required on this device for the determination of genistein concentration by rapid response square wave voltammetry. Results: The oxidation peak of genistein appeared with good response in acidic media at a peak potential of 0.6 V. Moreover, the signal was enhanced by modifying the conductive carbon ink with cobalt( II) phthalocyanine. Under the optimized conditions, the linear range was found to be 2.5-150 µM and the detection limit was 1.5 µM. Moreover, the small volume extraction was successfully developed without any further pre-concentration. This proposed method was applied to determine genistein in Derris scandens with satisfying results. Conclusion: The proposed method is promising as an alternative method for genistein determination with facile and fast analysis.

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Isopotential points in square-wave voltammetry of reversible electrode reactions

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc2009068 ◽

2009 ◽

Vol 74 (10) ◽

pp. 1489-1501 ◽

Cited By ~ 3

Author(s):

Marina Zelić ◽

Milivoj Lovrić

Keyword(s):

Square Wave Voltammetry ◽

Electrode Reaction ◽

Time Model ◽

Model Calculations ◽

Square Wave ◽

Electrode Reactions ◽

Wave Voltammetry ◽

Electron Transfer Processes ◽

Diagnostic Criterion ◽

First Time

Isopotential points in square-wave voltammetry are described for the first time. Model calculations and real measurements (performed with UO22+ and Eu3+ in perchlorate and bromide solutions, respectively) indicate that such an intersection could be observed when backward components of the net response, resulting from an increase in frequency or reactant concentration, are presented together. The electrode reaction should be fully reversible because quasireversible or slower electron transfer processes give the isopoints only at increasing reactant concentrations but not at increasing square-wave frequencies. The effect could be used as an additional diagnostic criterion for recognition of reversible electrode reactions where products remain dissolved in the electrolyte solution.

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Simultaneous Hydrolysis and Detection of Organophosphate by Benzimidazole Containing Ligand-Based Zinc(II) Complexes

Crystals ◽

10.3390/cryst11060714 ◽

2021 ◽

Vol 11 (6) ◽

pp. 714

Author(s):

Gaber A. M. Mersal ◽

Hamdy S. El-Sheshtawy ◽

Mohammed A. Amin ◽

Nasser Y. Mostafa ◽

Amine Mezni ◽

...

Keyword(s):

Square Wave Voltammetry ◽

Limit Of Detection ◽

Organophosphorus Compounds ◽

Organophosphorus Pesticides ◽

Carbon Paste ◽

Square Wave ◽

Wave Voltammetry ◽

Carbon Past Electrode ◽

Hydrolysis Of ◽

Biomimetic Sensor

The agricultural use of organophosphorus pesticides is a widespread practice with significant advantages in crop health and product yield. An undesirable consequence is the contamination of soil and groundwater by these neurotoxins resulting from over application and run-off. Here, we design and synthesize the mononuclear zinc(II) complexes, namely, [Zn(AMB)2Cl](ClO4) 1 and [Zn(AMB)2(OH)](ClO4) 2 (AMB = 2-aminomethylbenzimidazole), as artificial catalysts inspired by phosphotriesterase (PTE) for the hydrolysis of organophosphorus compounds (OPs) and simultaneously detect the organophosphate pesticides such as fenitrothion and parathion. Spectral and DFT (B3LYP/Lanl2DZ) calculations revealed that complexes 1 and 2 have a square-pyramidal environment around zinc(II) centers with coordination chromophores of ZnN4Cl and ZnN4O, respectively. Both 1 and 2 were used as a modifier in the construction of a biomimetic sensor for the determination of toxic OPs, fenitrothion and parathion, in phosphate buffer by square wave voltammetry. The hydrolysis of OPs using 1 or 2 generates p-nitrophenol, which is subsequently oxidized at the surface of the modified carbon past electrode. The catalytic activity of 2 was higher than 1, which is attributed to the higher electronegativity of the former. The oxidation peak potentials of p-nitrophenol were obtained at +0.97 V (vs. Ag/AgCl) using cyclic voltammetry (CV) and +0.88 V (vs. Ag/AgCl) using square wave voltammetry. Several parameters were investigated to evaluate the performance of the biomimetic sensor obtained after the incorporation of zinc(II) complex 1 and 2 on a carbon paste electrode (CPE). The calibration curve showed a linear response ranging between 1.0 μM (0.29 ppm) and 5.5 μM (1.6 ppm) for fenitrothion and 1.0 μM (0.28 ppm) and 0.1 μM (0.028 ppm) for parathion with a limit of detection (LOD) of 0.08 μM (0.022 ppm) and 0.51 μM (0.149 ppm) for fenitrothion and parathion, respectively. The obtained results clearly demonstrated that the CPE modified by 1 and 2 has a remarkable electrocatalytic activity towards the hydrolysis of OPs under optimal conditions.

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