Simple technique for constructing thin-layer electrochemical cells

Zhang, Chaojiong.; Park, Su Moon.

doi:10.1021/ac00166a037

Cited by 58 publications

(41 citation statements)

References 23 publications

(12 reference statements)

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“…Details of the instrumental setup have been described elsewhere. [21][22][23] Results and Discussion Although the compounds evaluated here for their electrochemical, spectroscopic, and catalytic properties are termed polymers, they are actually known to be oligomers with fewer than eight monomer units. In the two-dimensional polymer, phthalocyanine units are linked through 1,2,4,5-positions of benzene rings, as shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical and Spectroelectrochemical Studies of Cobalt Phthalocyanine Polymers

Ortiz

Park

Doddapaneni

1996

J. Electrochem. Soc.

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Spectroscopic and electrochemical properties of cobalt phthalocyanine (CoPc) polymers, which are believed to have two-and three-dimensional structures, have been studied and the results are reported. The spectral bands are shifted and a significant band broadening is observed as expected. The cyclic voltammetric results suggest that there are two energetically different Co ions in the three-dimensional polymer. The spectroscopic and electrochemical results indicate that the Co ion on the polymers appears to be in a partially reduced state in solution phases, as evidenced by the presence of the metal-ligand charge-transfer band. When adsorbed onto the carbon surface, this band becomes more prominent even in the formally unreduced state, perhaps due to the coordination of u-electron clouds of carbon into the coaxial axis of the complex, resulting in the partially reduced Co ion. As a result of this partial reduction, the electron transfer from CoPc polymers appears to be enhanced, which becomes the basis for the catalytic activities observed for this class of compounds.

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Section: Introductionmentioning

confidence: 99%

Electrochemical and Spectroelectrochemical Studies of Cobalt Phthalocyanine Polymers

Ortiz

Park

Doddapaneni

1996

J. Electrochem. Soc.

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“…The UVVisible absorption spectra and DCVA curve were obtained using the previously reported method. [23][24] A glassy carbon (GC) electrode was modified with VK1 or VK1/PC by spin coating at 250 rpm to increase homogeneity of the casting layer of VK 1 or VK 1 /PC.…”

Section: Methodsmentioning

confidence: 99%

Electrochemical and Spectroelectrochemical Behaviors of Vitamin K₁/Lipid Modified Electrodes and the Formation of Radical Anion in Aqueous Media

Yang¹,

Yoon²,

Won³

et al. 2010

Bulletin of the Korean Chemical Society

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The electrochemical properties of the liposoluble vitamin K1 adsorbed on bare and lipid coated glassy carbon electrodes (GCEs) were studied in unbuffered and well buffered aqueous media. The reduction products of vitamin K1 were characterized by employing cyclic voltammetry and the in situ UV-visible spectroelectrochemical technique. The radical species of vitamin K1 cannot be observed at the bare GCEs in well buffered media. The formation of the anion radical of vitamin K1 was observed in unbuffered solutions above pH 5.9 or at the lipid coated GCE in a well-buffered solution. UV-visible absorption bands of neutral vitamin K1 were observed at 260 nm and 330 nm, and a band corresponding to the anion radical species was observed at 450 nm. The derivative cyclic voltabsorptometric (DCVA) curves obtained for electrochemical reduction of vitamin K1 confirmed the presence of both neutral and anion radical species. The anion radical of vitamin K1 formed at the hydrophobic conditions with phosphatidylcholine (PC) lipid coated electrode was stable enough to be observed in the spectroelectrochemical experiments.

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“…The details of the setup have been described elsewhere. 25,26 Measurements of permanganate concentrations were made for current efficiency calculations using an S-2100 UV-vis Spectrophotometer from Scinco ͑Seoul, Korea͒. 1a͒.…”

Section: Methodsmentioning

confidence: 99%

Electrochemical Oxidation of Mn[sup 2+] on Boron-Doped Diamond Electrodes with Bi[sup 3+] Used as an Electron Transfer Mediator

Lee

Einaga

Fujishima

et al. 2004

J. Electrochem. Soc.

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Electrochemical oxidation of Mn 2ϩ with and without the presence of Bi 3ϩ was studied using voltammetric and in situ spectroelectrochemical techniques at boron-doped diamond ͑BDD͒ electrodes in 1.0 M HClO 4 . Electrochemical oxidation of only Mn 2ϩ resulted in the formation of mostly MnO 2 with MnO 4Ϫ produced as a minor product. The MnO 2 film formed on the electrode surface, which is an inevitable part of Mn 2ϩ oxidation, shows a blocking effect on the formation of MnO 4 Ϫ , and reduces the overall current efficiency of MnO 4 Ϫ production. Higher Mn 2ϩ concentrations result in less MnO 4 Ϫ production due to the formation of more MnO 2 . The addition of Bi 3ϩ increased the current efficiency of MnO 4 Ϫ production. The Bi 3ϩ is oxidized to Bi͑V͒, which acts as an electrocatalyst in MnO 4 Ϫ production. The Bi͑V͒ oxidizes MnO 2 , formed on the electrode surface, to MnO 4 Ϫ . This increases the production of MnO 4 Ϫ by removing the blocking film to provide an active electrode ͑bare BDD͒ surface, which is available for further Mn 2ϩ oxidation.

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Simple technique for constructing thin-layer electrochemical cells

Cited by 58 publications

References 23 publications

Electrochemical and Spectroelectrochemical Studies of Cobalt Phthalocyanine Polymers

Electrochemical and Spectroelectrochemical Studies of Cobalt Phthalocyanine Polymers

Electrochemical and Spectroelectrochemical Behaviors of Vitamin K₁/Lipid Modified Electrodes and the Formation of Radical Anion in Aqueous Media

Electrochemical Oxidation of Mn[sup 2+] on Boron-Doped Diamond Electrodes with Bi[sup 3+] Used as an Electron Transfer Mediator

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Simple technique for constructing thin-layer electrochemical cells

Cited by 58 publications

References 23 publications

Electrochemical and Spectroelectrochemical Studies of Cobalt Phthalocyanine Polymers

Electrochemical and Spectroelectrochemical Studies of Cobalt Phthalocyanine Polymers

Electrochemical and Spectroelectrochemical Behaviors of Vitamin K1/Lipid Modified Electrodes and the Formation of Radical Anion in Aqueous Media

Electrochemical Oxidation of Mn[sup 2+] on Boron-Doped Diamond Electrodes with Bi[sup 3+] Used as an Electron Transfer Mediator

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Electrochemical and Spectroelectrochemical Behaviors of Vitamin K₁/Lipid Modified Electrodes and the Formation of Radical Anion in Aqueous Media