The Chemical Analysis of Triphenyltin(IV)p-hydroxybenzoate by SquareWaveVoltammetry (original) (raw)
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2017
The determination of chemical kinetics constant of triphenyltin(IV) p-hydroxybenzoate by the use of cyclic voltammetry has been performed, The compound used was previously synthesized and well characterized and has been applied as anticorrosion inhibitor. The determination of kinetic constants of this compound will be useful to assess future reactivity through the value of forward chemical reaction rate constant (kf). In this study, carbocation intermediate was produced by oxidizing the compound, which will then react chemically with nucleophilic solvent. The measurement of standard solution triphenyltin(IV) p- hydroxybenzoate was at concentration of 0.8 mM in the water system: DMSO (3: 1) was monitored by cyclic voltammetry with the condition of a potential windows of 700 mV to 1400 mV; potential scan rate variation (ν) at intervals of 100 mV: 100-1000 mV/sec; the working electrode of gold (Au), reference electrode platinum (Pt) and the reference electrode of silver (Ag); and suppo...
Revista de Chimie, 2020
Chemical reactivity studies of the organotin(IV) carboxylates diphenyltin(IV) di-4-aminobenzoate (1) and triphenyltin(IV) 4-aminobenzoate (2) were conducted using cyclic voltammetry. Then, their antioxidant activities were tested by the 2,2-diphenyl-1-picrylshydrazyl (DPPH) method. Cyclic voltammetry was used to determine the kinetic constants of compounds 1 and 2 for the forward chemical reaction (kf). The constant values of the chemical reaction rate of 1 and 2 on cyclic voltammogram by experiment were obtained by comparing with the values from digital simulation methods obtained using Polar software 5.8.3. The results demonstrated that the constant value of the rate of the subsequent chemical reaction is a function of the rate of its potential (slope = kf/ν); that is, 6.481 and 6.069 1/V for 1 and 2, respectively. The type of chemical reaction mechanism that occurs around the surface of the working electrode follows reaction mechanism of electrochemical reaction is quasi reversible and chemical reaction is irreversible (EqCi). The antioxidant activities of compounds 1 and 2 produced IC50 values of 5.91 and 12.57 μg/mL, respectively. These results indicate that both compounds are active as antioxidants. However, their antioxidant activities were lower than that of ascorbic acid, which has an IC50 value of 0.66 μg/mL.
2016
School of Studies in Chemistry, Jiwaji University, Gwalior-474 010, Madhya Pradesh, India<br> E-mail : rajeevjain54@yahoo.co.in Fax : 91-751-2346209<br> ITM University, Gwalior, Madhya Pradesh, India<br> SLP Collage, Morar, Gwalior, Madhya Pradesh, India<br> Manuscript received online 08 April 2015, accepted 14 August 2015 The electrochemical behaviour of substituted thiosemicarbazones has been investigated. A series of<br> thiosemicarbazones (2<em>E</em>)-3-(2-hydroxyphenyl)-<em>N</em>-(4-substituted phenyl)triaz-2-ene-1-carbothioamide have been prepared.<br> The structure elucidation was done by elemental and spectral analysis. The electro reductions of synthesized compounds<br> have been also studied by cyclic voltammetry at glassy carbon electrode, which indicate the reducible behaviour from<br> its cyclic voltammogram. The nature of electrochemical process of all the synthesized compounds were studied on DM...
The corrosion inhibition efficiency of thiophene-2-carbaldehyde tryptophan (T2CTRY) on mild steel (MS) in 1 M HCl solution has been investigated and compared using weight loss measurements, electrochemical impedance spectroscopy, and potentiodynamic polarization analysis. The Schiff base exhibited very good corrosion inhibition on mild steel in HCl medium and the inhibition efficiency increased with the increase in concentration of the inhibitor. The adsorption of the inhibitor on the surface of the corroding metal obeys Freundlich isotherm. Thermodynamic parameters (K ads , ΔG 0 ads ) were calculated using adsorption isotherm. Polarization studies revealed that T2CTRY acts as a mixed type inhibitor. A maximum of 96.2% inhibition efficiency was achieved by EIS studies at a concentration of 1 mM.
Hacettepe journal of biology and chemistry, 2019
A mlodipine (AML) ve telmisartan (TLM)'ın elektrokimyasal davranışı; farklı sulu çözeltilerde, camsı karbon elektrotta, dönüşümlü, diferansiyel puls ve kare dalga voltametri (KDV) teknikleri kullanılarak araştırılmıştır. AML ve TLM anodik yönde bir pik (her ikisi de) vermiştir. Oksidasyon prosesi geri dönüşümsüz ve adsorpsiyon kontrollü olarak bulunmuştur. En tekrar edilebilir ve duyarlı ortam olarak 0.5 M H 2 SO 4 çözeltisi bulunmuş ve bu ortamda iyi bir hassasiyet elde edebilmek için enstrümantal ve biriktirme değişkenleri KDV tekniği ile çalışılmııştır. Bu çalışmada, AML ve TLM'ın eş zamanlı tayini için duyarlı, hızlı ve güvenilir yöntemin geliştirilmesi amaçlanmıştır. Bu voltametrik yöntem, 1.0×10-7 M ve 1.0×10-4 M aralığında AML için ve 1.0×10-7 M ve 1.0×10-5 M aralığında TLM için doğrusal dinamik cevaplar vermiş olup gözlenebilme sınırları AML ve TLM için sırasıyla 0.654 nM, 22.6 nM olarak bulunmuştur. Önerilen yöntem, AML ve TLM tabletlerinden analiz çalışmalarına başarıyla uygulanmış olup tamamen doğrulanmıştır. Anahtar Kelimeler Amlodipin, telmisartan, kare dalga voltametri, camsı karbon elektrot.
Main Group Metal Chemistry, 2021
This paper presents antimalarial activity of several triphenyltin(IV) aminobenzoate compounds synthesized from the reaction of triphenyltin(IV) hydroxide with 2-, 3-, and 4-aminobenzoic acid. The activity of the compounds as anti-malaria agents was evaluated using Plasmodium falciparum, and demonstrated that the compounds have about the same IC50 with that of chloroquine (2×10−3 μg/mL) applied as the positive control. The result also showed that the Plasmodium is non-resistent to the compounds synthesized, which is the opposite to chloroquine.
Indian Journal of Materials Science, 2014
The corrosion inhibition efficiency of thiophene-2-carbaldehyde tryptophan (T2CTRY) on mild steel (MS) in 1 M HCl solution has been investigated and compared using weight loss measurements, electrochemical impedance spectroscopy, and potentiodynamic polarization analysis. The Schiff base exhibited very good corrosion inhibition on mild steel in HCl medium and the inhibition efficiency increased with the increase in concentration of the inhibitor. The adsorption of the inhibitor on the surface of the corroding metal obeys Freundlich isotherm. Thermodynamic parameters (K ads , ΔG 0 ads ) were calculated using adsorption isotherm. Polarization studies revealed that T2CTRY acts as a mixed type inhibitor. A maximum of 96.2% inhibition efficiency was achieved by EIS studies at a concentration of 1 mM.
Electrochemical study of 1,5-diphenylcarbazide and 1,5-diphenylcarbazone in 0.3 M HClO4
Journal of Electroanalytical Chemistry, 1996
Diphenylcarbazide (DPCI) or diphenylcarbazone (DPCO) is introduced into carbon paste electrodes in order to determine the potential ranges where the oxidation-reduction processes of these species occur in 0.3 M HC104. The potential controlled electrolysis was performed for DPCI and DPCO dissolved in 0.3 M HCIO 4. From the coulometric results and the UV-visible spectral data of the solution before and after the electrolysis it is possible to establish that DPCI is oxidized in an irreversible process giving diphenylcarbadiazone (DPCDO). DPCO is probably an intermediate in this oxidation, but its concentration is never high because it is slightly more easily oxidized than DPCI. DPCO can be reduced to DPCI at about 0.2 V (ECS) and, finally, DPCDO can be reduced to DPCI at about -0.5 V (ECS). Again, DPCO is probably an intermediate but is not detected because it is so much more easily reduced than DPCDO.