Studies of the behavior of 5-hydroxyindole-3-acetamide at a solid electrode

Goyal, Rajendra N.; Sangal, Aditi

doi:10.1016/j.jelechem.2004.12.034

Cited by 12 publications

(8 citation statements)

References 27 publications

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“…The reaction of radical strongly depends on the experimental condition. Hydroxylated dimers and tryptamine-4,5-dione (TAD) (Scheme ) are the major products in neutral and acidic pH . These oxidation products are expected to adsorb on the surface of the nanoparticles (vide supra).…”

Section: Resultsmentioning

confidence: 99%

“…Note that the magnitude of peak current at −0.04 V is <0.15 μA at the scan rate of 100 mV/s, indicating that the surface concentration of the adsorbed species is very small. The oxidation of HT in aqueous solution depends on the pH and concentration of HT, and different products have been reported in the literature (vide infra) . 5,5‘-Dihydroxy-4,4‘-bitryptamine (DHB) and TAD are the two major products (Scheme ), which exhibit reversible voltammetric response in acidic and neutral pH. 37a,b,c As the voltammetric features for the GNPM and GNPW are closely similar to those of the two oxidation products of HT in aqueous solution, 37a,b,c we suggest that the voltammetric peaks ‘a' and ‘b' are attributed to the redox reaction (‘a' and ‘b' in Scheme ) of possible oxidation products TAD and DHB, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…The oxidation of HT in aqueous solution depends on the pH and concentration of HT, and different products have been reported in the literature (vide infra) . 5,5‘-Dihydroxy-4,4‘-bitryptamine (DHB) and TAD are the two major products (Scheme ), which exhibit reversible voltammetric response in acidic and neutral pH. 37a,b,c As the voltammetric features for the GNPM and GNPW are closely similar to those of the two oxidation products of HT in aqueous solution, 37a,b,c we suggest that the voltammetric peaks ‘a' and ‘b' are attributed to the redox reaction (‘a' and ‘b' in Scheme ) of possible oxidation products TAD and DHB, respectively. Because the peak ‘b' is well defined and the peak height is significantly higher than that of peak ‘b', we suggest that DHB is the predominant oxidation product at the experimental condition used in the present investigation.…”

Section: Resultsmentioning

confidence: 99%

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Shape-Controlled Synthesis of Gold Nanoprism and Nanoperiwinkles with Pronounced Electrocatalytic Activity

Jena

Raj

2007

J. Phys. Chem. C

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We report the one-pot shape-controlled aqueous synthesis of triangular gold nanoprisms (GNPMs) and nanoperiwinkles (GNPWs) and their electrocatalytic activity toward reduction of oxygen and oxidation of methanol. The GNPMs and GNPWs were synthesized using 5-hydroxytryptamine (HT) as a reducing/stabilizing agent at room temperature. The UV−visible absorption spectrum of the nanostructured colloidal particles exhibits transverse and longitudinal surface plasmon bands at 535 and 900 nm, respectively. The transmission electron microscopy measurement shows that the nanostructured particles have prism and periwinkle-like morphology. The concentration of HT controls the shape and morphology of the nanostructured particles. The GNPMs have the size of 70−110 nm whereas GNPWs have the size of 150−230 nm. The X-ray diffraction profiles of GNPMs and GNPWs reveal that the nanoparticles are composed of mainly a Au(111) lattice plane. The GNPMs and GNPWs were self-assembled on a three-dimensional silicate network derived from (3-mercaptopropyl)trimethoxysilane, and their spectral and electrochemical properties have been investigated. The UV−visible diffuse reflectance spectral measurement shows that both GNPM and GNPW retain their morphology on the silicate network. The nanoparticles on the silicate network show excellent electrocatalytic activity toward oxidation of methanol and reduction of oxygen. The electrocatalytic activity of GNPMs and GNPWs is higher than the spherical gold nanoparticles.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Shape-Controlled Synthesis of Gold Nanoprism and Nanoperiwinkles with Pronounced Electrocatalytic Activity

Jena

Raj

2007

J. Phys. Chem. C

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“…The indole is a powerful pharmacodynamic nucleus and has been reported to possess a wide variety of important biological properties such as anti-inflammatory, antibacterial, anticonvulsant and antioxidant properties [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical behaviour of isatin at a glassy carbon electrode

Diculescu

Kumbhat²,

Oliveira-Brett

2006

Analytica Chimica Acta

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The electrochemical behavior of isatin -a molecule with a broad range of applications in synthetic, biological and clinical activity -has been investigated over a wide pH range at a glassy carbon electrode (GCE) using cyclic, square wave and differential pulse voltammetry. The oxidation of isatin is an irreversible process, pH dependent and occurs with the formation of a main oxidation product that strongly adsorbs on the electrode surface. The reduction of isatin is also a pH dependent irreversible process. Cyclic voltammograms show two consecutive charge transfer reactions. The diffusion coefficient of isatin was calculated in pH 7.0 phosphate buffer to be D 0 = 4.9 × 10 −7 cm 2 s −1 . The limit of detection obtained in a solution of pH 7.0 phosphate buffer was LOD = 0.194 M, based on three times the noise level.

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“…The indole is strong pharmacodynamic moiety and possesses important biological properties such as anti-inflammatory, anti bacterial, anti convulsant, antioxidant properties [1][2][3] . Indole derivatives such as melatonin and its related structure indole-3-propionic derivatives behave as important class of anti oxidant compound and potentially useful against Alzheimer disease [4][5][6][7][8][9] .…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Study of Isatin-3-(methyenel)-hydrazone Schiff Base on Carbon Paste Electrode

2015

Chem Sci Trans

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This work explains the electrochemical behavior of isatin-3-(methyenel)hydrazone that is formed by the reaction of isatin-3hydrazone and formaldehyde. The electrochemical behavior of synthesized compound was investigated in phosphate buffer, LiCl as a supporting electrolyte and at carbon paste electrode by cyclic voltammetry. In this study we find oxidizing product of synthesized Schiff base strongly adsorbed on the carbon paste electrode and show quasi reversible nature at initial scan rate.

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Studies of the behavior of 5-hydroxyindole-3-acetamide at a solid electrode

Cited by 12 publications

References 27 publications

Shape-Controlled Synthesis of Gold Nanoprism and Nanoperiwinkles with Pronounced Electrocatalytic Activity

Shape-Controlled Synthesis of Gold Nanoprism and Nanoperiwinkles with Pronounced Electrocatalytic Activity

Electrochemical behaviour of isatin at a glassy carbon electrode

Electrochemical Study of Isatin-3-(methyenel)-hydrazone Schiff Base on Carbon Paste Electrode

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