Cobalt complex electrochemically responding to hydrogen peroxide and preparation method thereof

A technology of hydrogen peroxide and complexes, applied in the field of material chemistry, can solve the problems of poor chemical stability, high price, complicated preparation procedures, etc., achieve good electrochemical response performance, and facilitate the transfer of electrons

Active Publication Date: 2017-07-14
NINGBO UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its application is limited due to the instability and high price of the enzyme; therefore, the enzyme-free sensor-based H 2 o 2 Detection is gaining

Method used

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  • Cobalt complex electrochemically responding to hydrogen peroxide and preparation method thereof
  • Cobalt complex electrochemically responding to hydrogen peroxide and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0016] Example 1:

[0017] Weigh Co(Ac) 2 ·4H 2 O (0.0747g, 0.3mmol), potassium 5-nitroorotate monohydrate (0.0772g, 0.3mmol), put in a 50mL beaker, add 15mL of distilled water, heat and stir for 20min to form a reaction mixture solution, and use hydrogen Adjust the pH value of the reaction mixture solution to 4.5 with dilute potassium oxide solution, let it stand at room temperature, slowly evaporate the solvent until crystals are precipitated, remove the residual solution by filtration, and naturally air-dry to obtain orange-yellow blocky crystals, which are cobalt complexes.

Example Embodiment

[0018] Example 2:

[0019] Weigh Co(Ac) 2 ·4H 2 O (0.374g, 1.5mmol), potassium 5-nitroorotate monohydrate (0.257g, 1.0mmol), put in a 50mL beaker, add 30mL of distilled water, heat and stir for 30min to form a reaction mixture solution, and use hydrogen Adjust the pH value of the reaction mixture solution to 5.5 with dilute potassium oxide solution, let it stand at room temperature, slowly evaporate the solvent until crystals are precipitated, remove the residual solution by filtration, and naturally air-dry to obtain orange-yellow blocky crystals, which are cobalt complexes.

Example Embodiment

[0020] Example 3:

[0021] Weigh Co(Ac) 2 ·4H 2 O (0.249g, 1.0mmol), potassium 5-nitroorotate monohydrate (0.257g, 1.0mmol), put in a 50mL beaker, add 20mL of distilled water, heat and stir for 25min to form a reaction mixture solution, and use hydrogen Potassium oxide dilute solution to adjust the pH value of the reaction mixture solution to 5.0, let it stand at room temperature, slowly evaporate the solvent to precipitate crystals, filter to remove the residual solution, and naturally air-dry to obtain orange-yellow blocky crystals, which are cobalt complexes.

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Abstract

The invention discloses a cobalt complex electrochemically responding to hydrogen peroxide and a preparation method thereof. The cobalt complex has a very good electro-catalytic activity and a good electrochemical responding performance on hydrogen peroxide. The chemical formula of the cobalt complex is CoC5H9N3O10, the structure unit is [Co(C5HN3O6(H2O)4], the crystal system is an orthorhombic crystal system, the space group is Pca2(1), the cell parameters are as follows: a=19.0262 angstrom, b=5.4287 angstrom, c=10.4010 angstrom, and alpha=beta=gamma=90 degrees; and the cobalt ions have a hexa-coordinated octahedral geometrical configuration. The cobalt complex is prepared by mixing cobalt acetate hydrate and potassium 5-nitroorotate according to a certain ratio to carry out reactions. The preparation method has the advantages of simple operation and low cost, and is suitable for massive production. The prepared cobalt complex has a definite space structure and an accurate molecular formula, has a very good electro-catalytic activity on hydrogen peroxide, and can be advantageously used in electro-catalytic responding or electrochemical sensor detection.

Description

technical field [0001] The invention relates to the field of material chemistry, in particular to a cobalt complex with electrochemical response to hydrogen peroxide and a preparation method thereof. Background technique [0002] The transition metal cobalt ion has multiple empty d orbitals, which can form a variety of chemical bonds with various anions or organic ligands. Designing and synthesizing cobalt coordination compounds (also called complexes) with novel structures or some special properties has attracted widespread attention. For example, Oshima's research group reported that Co compounds can efficiently catalyze the coupling reaction of carbon-carbon bond formation (J. Am. Chem. Soc., 2002, 124(23): 6514-6515). In addition, transition metal cobalt complexes have also been reported as electrocatalysts. For example, Chinese patent CN 103000913A discloses a method for reducing molecular oxygen using a triarylcorrole cobalt complex as an electrocatalyst, which has a...

Claims

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Application Information

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IPC IPC(8): C07D239/557B01J31/22G01N27/26
CPCB01J31/2217C07D239/557G01N27/26
Inventor 宋铂李星
Owner NINGBO UNIV
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