One-Step Electrochemical Synthesis of a Very Thin Overoxidized Polypyrrole Film

2007 ◽  
Vol 10 (12) ◽  
pp. E24 ◽  
Author(s):  
Catherine Debiemme-Chouvy
Keyword(s):  
Electrochemical Synthesis ◽  
Polypyrrole Film ◽  
One Step ◽  
Overoxidized Polypyrrole

scholarly journals Assay of Phospholipase D Activity by an Amperometric Choline Oxidase Biosensor

Sensors ◽  
2020 ◽  
Vol 20 (5) ◽  
pp. 1304 ◽  
Author(s):  
Rosanna Ciriello ◽  
Antonio Guerrieri
Keyword(s):  
Phospholipase D ◽  
Limit Of Detection ◽  
High Sensitivity ◽  
Fast Response ◽  
Borate Buffer ◽  
Choline Oxidase ◽  
Linear Calibration ◽  
Real Sample Analysis ◽  
Polypyrrole Film ◽  
Overoxidized Polypyrrole

A novel electrochemical method to assay phospholipase D (PLD) activity is proposed based on the employment of a choline biosensor realized by immobilizing choline oxidase through co-crosslinking on an overoxidized polypyrrole film previously deposited on a platinum electrode. To perform the assay, an aliquot of a PLD standard solution is typically added to borate buffer containing phosphatidylcholine at a certain concentration and the oxidation current of hydrogen peroxide is then measured at the rotating modified electrode by applying a detection potential of +0.7 V vs. SCE. Various experimental parameters influencing the assay were studied and optimized. The employment of 0.75% (v/v) Triton X-100, 0.2 mM calcium chloride, 5 mM phosphatidylcholine, and borate buffer at pH 8.0, ionic strength (I) 0.05 M allowed to achieve considerable current responses. In order to assure a controlled mass transport and, at the same time, high sensitivity, an electrode rotation rate of 200 rpm was selected. The proposed method showed a sensitivity of 24 (nA/s)⋅(IU/mL)−1, a wide linear range up to 0.33 IU/mL, fast response time and appreciable long-term stability. The limit of detection, evaluated from the linear calibration curve, was 0.005 IU/mL (S/N = 3). Finally, due to the presence of overoxidized polypyrrole film characterized by notable rejection properties towards electroactive compounds, a practical application to real sample analysis can be envisaged.

One-step electrochemical synthesis of Bi3.84W0.16O6.24 with superior photocatalytic activities

RSC Advances ◽  
2015 ◽  
Vol 5 (26) ◽  
pp. 20234-20237 ◽  
Author(s):  
Zuwei Song ◽  
Hui Dai ◽  
Jiantao Tong
Keyword(s):  
Electrochemical Synthesis ◽  
Room Temperature ◽  
Photocatalytic Activities ◽  
One Step

Bi3.84W0.16O6.24 nanoparticles were successfully prepared by a facile electrochemical route at room temperature in just 10 minutes.

Electrochemical synthesis and one step modification of PMProDot nanotubes and their enhanced electrochemical properties

2012 ◽  
Vol 48 (21) ◽  
pp. 2725 ◽  
Author(s):  
Thao M. Nguyen ◽  
Seungil Cho ◽  
Nitinun Varongchayakul ◽  
Daehyun Yoon ◽  
Joonil Seog ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Electrochemical Synthesis ◽  
One Step

The direct electrochemical synthesis of neutral and anionic complexes of thorium(IV)

1982 ◽  
Vol 60 (20) ◽  
pp. 2579-2582 ◽  
Author(s):  
N. Kumar ◽  
Dennis G. Tuck
Keyword(s):  
Electrochemical Oxidation ◽  
Electrochemical Synthesis ◽  
Good Yield ◽  
Electrochemical Methods ◽  
Chelate Complexes ◽  
Anionic Complexes ◽  
One Step

The electrochemical oxidation of thorium into solutions of halogen (X2; X = Cl, Br) in acetonitrile yields the adducts ThX4•4CH3CN in good yield. With solutions of X2 + R4NX, the products are (R4N)2ThX6. Neutral chelate complexes such as Th(acac)4 (acac = 2,4-pentanedionate) can also be prepared in a one-step synthesis from the metal, but cationic complexes could not be obtained by electrochemical methods.

Preparation of sulfonated overoxidized polypyrrole film applicable as an SPME tool for cationic analytes

2004 ◽  
Vol 570 (1) ◽  
pp. 6-12 ◽  
Author(s):  
Tamer Uğur ◽  
Şahin Yücel ◽  
Ertaş Nusret ◽  
Udum Yasemin ◽  
Pekmez Kadir ◽  
...  
Keyword(s):  
Polypyrrole Film ◽  
Overoxidized Polypyrrole ◽  
Cationic Analytes
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