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Electrode for superoxide anion and sensor using the same

A technology of peroxides and anions, used in material analysis, instruments, electrolytic coatings, etc. by electromagnetic means

Inactive Publication Date: 2007-04-25
汤浅真
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] But, because hydrogen peroxide is produced in the disproportionation reaction of superoxide anion free radical shown in above-mentioned reaction, and it is the poisonous substance of metalloporphyrin coordination compound polymeric film, must find a way to make when measuring superoxide anion affected by it

Method used

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  • Electrode for superoxide anion and sensor using the same
  • Electrode for superoxide anion and sensor using the same
  • Electrode for superoxide anion and sensor using the same

Examples

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Embodiment

[0069] Although the present invention will be described in more detail below with reference examples, examples, comparative examples, and test examples, the present invention is not limited thereto.

reference example 1

[0071] Synthesis of Metal Thiofuryl Porphyrin-Axial Ligand Coordination Compound (1):

[0072] Dissolve 0.036 g of 5,10,15,20-tetrakis(3-thiofuryl)porphyrinate iron(III) bromide and 200 μl of 1-methylimidazole in 1 ml of distilled dichloromethane at room temperature Stir for 5 hours. It was evaporated to dryness using an evaporating device to obtain [5,10,15,20-tetrakis(3-thiofuryl)porphyrin iron (III) bis(1-methylimidazolyl)] bromide (yield was 92%).

[0073] UV(CHCl 3 , nm, λmax): 419.

[0074] Since the absorption wavelength (λmax=424nm) is different from that of the coordination compound without imidazole, it was confirmed that imidazole was coordinated. In addition, in the magnetic circular dichroism spectrum, the polarization angles around 580 nm and 600 nm were reduced due to the coordination of imidazole, thereby confirming the hexacoordinate structure.

[0075] The UV (ultraviolet) spectrum of the raw material 5,10,15,20-tetrakis(3-thiofuryl)porphyrinate iron(III...

reference example 2

[0077] Synthesis of Metal Thiofuryl Porphyrin-Axial Ligand Coordination Compound (2):

[0078] Dissolve 0.041 g of 5,10,15,20-tetrakis(3-thiofuryl)porphyrinate iron(III) bromide and 0.08 g of 1-benzyl imidazole in 3 ml of distilled chloroform and stir at room temperature 5 hours. It was evaporated to dryness using an evaporator to obtain [5,10,15,20-tetrakis(3-thiofuryl)porphyrin iron(III)bis(1-benzylimidazolyl)]bromide (yield is 90%).

[0079] UV(CHCl 3 , nm, λmax): 418.

[0080] Since the absorption wavelength (λmax=424nm) is different from that of the coordination compound without imidazole, it was confirmed that imidazole was coordinated.

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Abstract

An electrode for superoxide anion characterized by comprising a conductive member and, superimposed on a surface thereof, a film resulting from electrolytic polymerization of a metal thiofurylporphyrin / axial ligand complex; and a sensor for measuring superoxide anion concentration, including the same. This electrode for superoxide anion, by virtue of not only the excellent performance of electrode provided with the metal porphyrin complex polymer film but also the presence of axial ligand, can prevent poisoning by poisoning substances such as hydrogen peroxide. Accordingly, in any of in-vitro and in-vivo environments, this electrode for superoxide anion enables detection of superoxide anion radicals without suffering any influence from poisoning substances such as hydrogen peroxide. Moreover, the quantitative assay of superoxide anions can be performed by the use of this electrode for superoxide anion in combination with a counter electrode or reference electrode. Thus, this electrode for superoxide anion can find wide applicability in various fields.

Description

technical field [0001] The present invention relates to superoxide anion radical (O 2 - -) and other electrodes for peroxide anion, and a sensor for measuring the concentration of peroxide anion using the electrode for concentration measurement. More specifically, it relates to an electrode for peroxide anion and an electrode for measuring the concentration of superoxide anion, which can be applied in vivo and are not affected by toxic substances such as hydrogen peroxide present in the measurement system. sensor. Background technique [0002] Peroxide anion radicals (O 2 - -), in the living body, it is produced by the oxidation of xanthine and hypoxanthine to uric acid under the action of xanthine-xanthine oxidase (XOD) and the reduction of oxygen by hemoglobin, etc., which is combined with the physiologically active substances in the living body It plays an important role in the synthesis, bactericidal effect, aging phenomenon and so on. On the other hand, it is cons...

Claims

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Application Information

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IPC IPC(8): G01N27/416G01N27/327G01N27/333
CPCG01N27/3335C25D9/00
Inventor 汤浅真小柳津研一山口有朋石川满寿英江口胜哉小林朋广筒井晓丰田裕次郎
Owner 汤浅真
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