scholarly journals N-Benzoyl / (4-nitrobenzoyl)-N'-4-cyanophenyl thioureas

2018 ◽  
Author(s):  
Fatma Aydin
Keyword(s):  
Glassy Carbon ◽  
13C Nmr ◽  
Functional Group ◽  
Reduction Potential ◽  
High Yield ◽  
Spectroscopic Methods ◽  
Carbon Electrode ◽  
Cyclic Voltammetric ◽  
Elementary Analysis ◽  
Ft Ir

Herein, two title compounds, N-Benzoyl-N’-4-cyanophenyl thiourea (I) and N-(4-nitrobenzoyl)-N’-4-cyanophenyl thiourea (II) were synthesized in high yield, via aroyl isocyanate and 4-aminobenzonitrile. The structure of the prepared compounds was characterized by elementary analysis and FT-IR, 1H, 13C NMR spectroscopic methods. Cyclic voltammetric (CV) experiments were performed with glassy carbon electrode. The reduction potential values of different functional group such as nitro, cyano in title compounds were investigated using CV curves.

scholarly journals Synthesis, Crystal Structure and Cyclic Voltammetric Behavior of N-aroyl-N′-(4′-cyanophenyl)thioureas

Molbank ◽  
10.3390/m1316 ◽  
2022 ◽  
Vol 2022 (1) ◽  
pp. M1316
Author(s):  
Fatma Aydin ◽  
N. Burcu Arslan
Keyword(s):  
Crystal Structure ◽  
Molecular Electrostatic Potential ◽  
High Yield ◽  
Spectroscopic Methods ◽  
Carbon Electrode ◽  
Cyclic Voltammetric ◽  
1H And 13C Nmr ◽  
X Ray ◽  
Voltammetric Behavior ◽  
Ft Ir

Herein, two title compounds, N-benzoyl-N′-(4′-cyanophenyl)thiourea (1) and N-(4-nitrobenzoyl)-N′-(4′-cyanophenyl)thiourea (2) were synthesized in a high yield, via different applications of aroyl isocyanate and 4-aminobenzonitrile. The structure of the prepared compounds was characterized by elemental analysis and FT-IR, 1H, and 13C-NMR spectroscopic methods. The crystal structure of the title compound 1 was determined by an X-ray single-crystal technique and an intramolecular C=O…H-N hydrogen bond and intermolecular C=S…H-N and C=S…H-C hydrogen interactions, which were observed for the crystal structure. The molecular electrostatic potential (MEP) and the Mulliken atomic charges of title compounds 1 and 2 were theoretically calculated and interpreted. Cyclic voltammetric (CV) experiments for the compounds were performed with the glassy carbon electrode. The reduction in potential values of the different functional groups such as nitro and cyano in title compounds were investigated using CV curves.

scholarly journals Synthesis, spectroscopic studies and electrochemical properties of Schiff bases derived from 2-hydroxyaldehydes and phenazopyridine hydrochloride

2013 ◽  
Vol 78 (6) ◽  
pp. 795-804 ◽  
Author(s):  
Sultan Yagmur ◽  
Selehattin Yilmaz ◽  
Gulsen Saglikoglu ◽  
Murat Sadikoglu ◽  
Mustafa Yildiz ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Electrochemical Reduction ◽  
Schiff Bases ◽  
Glassy Carbon ◽  
Reduction Potential ◽  
Spectroscopic Studies ◽  
Spectroscopic Techniques ◽  
Carbon Electrode ◽  
Reduction Mechanism ◽  
Cyclic Voltammetric

Novel Schiff bases (1-4) were synthesized by the reaction of 2-hydroxybenzaldehyde, 2-hydroxy-5-methoxybenzaldehyde, 2-hydroxy-5-nitrobenzaldehyde, 2-hydroxy-1-naptaldehyde with phenazopypridine hydrochloride (PAP) and their structures were elucidated by means of spectroscopic techniques. The electrochemical reduction of PAP and its Schiff bases (1-4) were carried out on glassy carbon electrode (GCE) in dimethyl sulfoxide (DMSO) using the cyclic voltammetric (CV) technique. The effect of functional groups on reduction potential of Schiff bases was investigated. A general electrochemical reduction mechanism of the compounds was also suggested.

scholarly journals Effect of Anodic Pretreatment on the Performance of Glassy Carbon Electrode in Acetonitrile and Electrooxidation of Para-substituted Phenols in Acetonitrile on Platinum and Glassy Carbon Electrode

2019 ◽  
Vol 65 (1) ◽  
pp. 133-138 ◽  
Author(s):  
László Kiss ◽  
Sándor Kunsági-Máté
Keyword(s):  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Electrode Surface ◽  
Platinum Electrode ◽  
Anodic Peak ◽  
Carbon Electrode ◽  
Substituted Phenols ◽  
Cyclic Voltammetric ◽  
Pretreatment Time

In the first part of the work electropolymerisation of phenol was studied at glassy carbon electrode. Rapid fouling of its surface indicated the formation of coherent poly(phenyleneoxide) layer which was demonstrated by the repeated cyclic voltammetric scans. Effect of anodic pretreatment potential in acetonitrile solvent was also investigated and the results showed that at potentials higher than 2 V glassy carbon electrode becomes deactivated. Preanodisation of glassy carbon electrode at 3 V in acetonitrile resulted in diminished anodic peak currents by phenols. It was due to the partial deactivation of electrode surface and its extent increased with the pretreatment time. The electrooxidation of para-substituted phenols (p-Cl-phenol, p-NO2-phenol, p-tertbutylphenol, p-methoxyphenol) in acetonitrile resulted in no fouling layer on platinum electrode and the peak currents were significantly higher than in the first scan of unsubstituted phenol in the same concentration. Glassy carbon deactivated continuously by repeating the scans due to the solvent and bonding of products on the surface.

scholarly journals Cyclic voltammetric study of the influence of porosity on electrochemical response of nickel-alumina modified glassy carbon electrode

2018 ◽  
Vol 50 (3) ◽  
pp. 313-321
Author(s):  
Ana Ivanovic-Sasic ◽  
Tatjana Novakovic ◽  
Zorica Mojovic ◽  
Zeljko Cupic ◽  
Dusan Jovanovic
Keyword(s):  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Modified Electrodes ◽  
Textural Properties ◽  
Nitrogen Adsorption ◽  
Carbon Electrode ◽  
Modified Glassy Carbon Electrode ◽  
Cyclic Voltammetric ◽  
Cyclic Voltammetric Study ◽  
Adsorption Desorption

Pure and nickel-modified alumina powders with different porosity were synthesized and applied on the glassy carbon electrode by means of Nafion polymer. The data obtained from the nitrogen adsorption-desorption isotherm confirmed that the pore structures in these materials are complex and tend to be made up of interconnected networks of pores of different size and shape. The addition of Ni2+ ions caused the changes in the textural properties of the samples. The influence of porosity on the electrochemical behavior of modified electrodes in quasi-reversible process was tested by cyclic voltammetry. Numerical correlations between electrochemical responses of GCE modified with alumina samples and textural properties have been established.

scholarly journals A 2-(2’-pyridyl)quinoline ruthenium(II) complex as an active catalyst for the transfer hydrogenation of ketones

2016 ◽  
Vol 14 (1) ◽  
pp. 308-315 ◽  
Author(s):  
Nikolaos Zacharopoulos ◽  
Konstantinos Koukoulakis ◽  
Evangelos Bakeas ◽  
Athanassios I. Philippopoulos
Keyword(s):  
Catalytic Activity ◽  
Active Catalyst ◽  
Mass Spectrometric ◽  
Transfer Hydrogenation ◽  
High Yield ◽  
Spectrometric Analysis ◽  
Spectroscopic Methods ◽  
Conductivity Measurements ◽  
Octahedral Environment ◽  
Ft Ir

AbstractThe ruthenium(II) complex cis-[RuCl2(PPh3)2(L1)] (1) where L1 = 2-(2’-pyridyl)quinoline was obtained in high yield from the reaction of [RuCl2(PPh3)3] with L1. The new compound was characterized by different spectroscopic methods including FT-IR, UV-Vis, NMR (1H, 31P) spectroscopy along with a mass spectrometric analysis (ESI-MS) and conductivity measurements. 31P NMR spectroscopy provided evidence that the two PPh3 ligands are orientated trans to each other in an octahedral environment. Complex (1) was tested in the transfer hydrogenation of various ketones in 2-propanol at 82 oC. The catalytic activity of (1) displayed quantitative conversions for benzophenone and 4-chloroacetophenone.

scholarly journals Natural Flavonoids Interact with Dinitrobenzene System in Aprotic Media: An Electrochemical Probing

2012 ◽  
Vol 7 (3) ◽  
pp. 1934578X1200700
Author(s):  
Nasima Arshad ◽  
Naveed K. Janjua ◽  
Athar Y. Khan ◽  
Azra Yaqub ◽  
Torsten Burkholz ◽  
...  
Keyword(s):  
Reduction Potential ◽  
Intramolecular Hydrogen Bonding ◽  
Quantum Mechanical ◽  
Carbon Electrode ◽  
Electrochemical System ◽  
Cyclic Voltammetric ◽  
Anodic Peak Current ◽  
Acidic Nature ◽  
Intramolecular Hydrogen ◽  
Semi Empirical

Three structurally related natural flavonoids (FlOH), quercetin (Q), rutin (R) and morin (M), were investigated by cyclic voltammetry to probe their interactions with hazardous 1,4-dinitrobenzene (1,4-DNB) using a glassy carbon electrode. Scavenging of 1,4-DNB by FlOH was inferred from a positive shift in reduction potential, decrease in anodic peak current, and irreversible electrochemical behavior of 1,4-DNB on increasing the flavonoid concentration. The homogeneous bi-molecular rate constant (k2) was determined using the Nicholson-Shain equation and found to be higher for the dianion. Morin posed a comparatively higher k2 value for its interaction with the 1,4-DNB electrochemical system owing to its more acidic nature and least intramolecular hydrogen bonding. The cyclic voltammetric (CV) results were further supported by HyperchemPM3 quantum mechanical semi-empirical calculations, which point towards ErCi interactions between flavonoids and 1,4-DNB. The present investigation is biologically significant in terms of natural flavonoidal scavenging activity toward toxins such as dinitroaromatics.

scholarly journals Fabrication of Ag@Co-Al Layered Double Hydroxides Reinforced poly(o-phenylenediamine) Nanohybrid for Efficient Electrochemical Detection of 4-Nitrophenol, 2,4-Dinitrophenol and Uric acid at Nano Molar Level

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
T. Dhanasekaran ◽  
R. Manigandan ◽  
A. Padmanaban ◽  
R. Suresh ◽  
K. Giribabu ◽  
...  
Keyword(s):  
Uric Acid ◽  
Detection Limit ◽  
Electrochemical Detection ◽  
Glassy Carbon ◽  
Layered Double Hydroxides ◽  
Modified Electrodes ◽  
Electrochemical Sensing ◽  
Carbon Electrode ◽  
Ft Ir ◽  
Double Hydroxides

Abstract In this paper, Co-Al layered double hydroxides (LDHs), Co-Al LDHs/poly(o-phenylenediamine) (PoPD) and Ag nanoparticles decorated Co-Al LDHs/PoPD (Ag@Co-Al LDH/PoPD) samples were prepared. The as-prepared samples were characterized by XRD, Raman, XPS, FT-IR, DRS-UV-Vis, PL and TGA techniques. The salient features of morphology and size of the samples were determined using FESEM, and HR-TEM. Then, the samples were coated on glassy carbon electrode (GCE) and employed for sensing of 4-nitrophenol (4-NP), 2,4-dinitrophenol (2,4-DNP)) and uric acid (UA). It was found that Ag@Co-Al LDH/PoPD/GCE showed superior electrochemical sensing behaviour than other modified electrodes. It exhibits the detection limit (DL) of 63 nM, 50 nM and 0.28 µM for 4-NP, 2,4-DNP and UA respectively.

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