Synthesis, Characterizations and Investigation of Electrochemical Behaviours of 4‐[(2‐Hydroxyphenylimino)methyl]benzene‐1,3‐diol

Mülazımoğlu, Ayşen Demir; Mülazımoğlu, İbrahim Ender; Mercimek, Bedrettin

doi:10.1155/2009/426170

Cited by 6 publications

(6 citation statements)

References 13 publications

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“…The direct oxidation or reduction of substrate detects the electrochemical methods acting on the electrode surface. Electrode reactions are very appreciable and suitable for the analytical applications because of its high potential requirements [23]. The most common method that is electrochemical determination has been here regarded as fastest, cheapest and long lasting technique in the analytical quantitative determination of different analytical species [24].…”

Section: Introductionmentioning

confidence: 99%

Thermodynamics And Electrochemical Characterization Of Core-shell Type Gold-coated Superparamagnetic Iron Oxide Nanoparticles

Mohammad¹,

Arfin²,

Vidyanagar³

2014

Adv. Mater. Lett.

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In continuation to our previous work, the superparamagnetic Fe 3 O 4 @Au core-shell type nanoparticles (NPs) were further characterized by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), electrical conductivity, impedance and cyclic voltammetry measurements. From the analysis of DSC and TGA results with our Fe 3 O 4 @Au NPs of about 6.25 ± 0.6 nm size, we observed a clear endothermic peak at 310°C due to the decomposition of the oleic acid/oleylamine surface ligands and the particles found to contain more than 80% of the metallic content from the mixed compositions of gold and iron oxide. Because of the conduction through the Fe 3 O 4 @Au grain, the impedance profile of the pellet exhibited a wellresolved semi-circle and an inclined spike in a far low-frequency region. The electrical conductivity of the Fe 3 O 4 @Au material found to be increased with an increase of temperature. The standard Gibbs free energy (ΔG) of the reaction provided a criterion for spontaneous changes in the equilibrium of the material. From the analysis of the results of ΔG, it appears that at 25°C temperature, ΔS found to be negative. The calculated enthalpy, ΔH = -0.635 kJ/mol, at the corresponding entropy of ΔS = -0.132 kJ/mol. Finally, the activation energy in temperature range of 25-200°C for the Fe 3 O 4 @Au core-shell material was calculated using Line fitting and the surface characterization by using cyclic voltammetry. The electrochemical redox property of the Fe 3 O 4 @Au quasi-reversible wave corresponding to Au 3+ /Au 2+ .

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Section: Introductionmentioning

confidence: 99%

Thermodynamics And Electrochemical Characterization Of Core-shell Type Gold-coated Superparamagnetic Iron Oxide Nanoparticles

Mohammad¹,

Arfin²,

Vidyanagar³

2014

Adv. Mater. Lett.

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“…Reaction of the previously reported [16,17,18,19] H2L 1-3 molecules with [MoO2(acac)2] in refluxing alcohol gave, by analogy with the parent H2SAP ligand [8a, 20] and with other related systems [ 20 ], either mononuclear alcohol adducts, [MoO2L(ROH)], or oligonuclear [MoO2L]n depending on the nature of the ligands and on the reaction conditions (see Scheme 1). The reaction of H2L 1 in EtOH and H2L 2 in MeOH yielded the new mononuclear complexes [MoO2L 1 (EtOH)] and [MoO2L 2 (MeOH)], respectively, which could be transformed to the alcohol free systems upon drying under vacuum at high temperatures.…”

Section: Synthesismentioning

confidence: 99%

“…Table 1. Selected IR vibrations (ν, cm -1 ) of the H2SAP, H2L [17] 1618 --H2L 2 [18] 1603 --H2L 3 [19] 1612…”

Section: Ir Characterizationsmentioning

confidence: 99%

OH-substituted tridentate ONO Schiff base ligands and related molybdenum(VI) complexes for solvent-free (ep)oxidation catalysis with TBHP as oxidant

Wang

Daran

Poli

et al. 2016

Journal of Molecular Catalysis A: Chemical

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Molybdenum complexes with ONO tridentate Schiff base ligands based on salicylideneaminophenolato (SAP) backbone with OH substitution on the salicyl arene ring have been synthesized and characterized. The molecular structures of the full series of OH substituted molybdenum complexes were determined by X-ray crystallography as monomers stabilized by one solvent molecule, [MoO2L(D)]. All dimeric complexes [MoO2L]2 were tested for the epoxidation of cyclooctene and cyclohexene under organic solvent-free conditions using aqueous TBHP as oxidant. The position of the OH on the SAP-modified ligand influenced the catalytic activity of the respective complexes. DFT calculations for the catalytic cycle yield energy spans in agreement with the experimentally observed activity trend.

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“…First, in the following order, the GC electrodes were sonicated both in water, and in 1 : 1 (v/v) isopropyl alcohol (IPA) and MeCN (IPA + MeCN) mixture for 10 min. [34][35][36][37] The electrochemical modification of the GC electrode was performed with 1 mM apigenin in 10 mL MeCN + 40 mL PBS, pH 7, mixture from 0 mV to +1400 mV potential range, using 100 mV s À1 sweep rate and 30 cycles.…”

Section: Preparation and Modification Of The Working Electrodesmentioning

confidence: 99%

A novel apigenin modified glassy carbon sensor electrode for the determination of copper ions in soil samples

Mülazımoğlu

Solak

2011

Anal. Methods

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In this study, electrochemical modification of a glassy carbon (GC) electrode with apigenin was carried out and the modified electrode was used for determination of copper(II) (Cu(II)) in soil samples. The GC was modified through the electrochemical polymerization of apigenin (PolyApi/GC) on the electrode surface in aqueous media. The electrode surface was modified with apigenin in phosphate buffer solution (PBS), pH 7, from 0 mV to +1400 mV potential ranges, using 100 mV s À1 sweep rate and 30 cycles by cyclic voltammetry (CV). The surface characterizations of this sensor electrode were performed by CV, electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM). Britton-Robinson (BR) buffer solution at pH 5 was used for determination of Cu(II) by differential pulse voltammetry (DPV). The detection limit was obtained as lower as 1.0 Â 10 À11 M. By using this calibration curve, the amount of Cu(II) was determined as 7.34 Â 10 À7 M in soil samples. The results showed that pH, incubation time and interferences of some cations and anions were significant.

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Synthesis, Characterizations and Investigation of Electrochemical Behaviours of 4‐[(2‐Hydroxyphenylimino)methyl]benzene‐1,3‐diol

Cited by 6 publications

References 13 publications

Thermodynamics And Electrochemical Characterization Of Core-shell Type Gold-coated Superparamagnetic Iron Oxide Nanoparticles

Thermodynamics And Electrochemical Characterization Of Core-shell Type Gold-coated Superparamagnetic Iron Oxide Nanoparticles

OH-substituted tridentate ONO Schiff base ligands and related molybdenum(VI) complexes for solvent-free (ep)oxidation catalysis with TBHP as oxidant

A novel apigenin modified glassy carbon sensor electrode for the determination of copper ions in soil samples

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