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Electrochemical sensor based on CoCuCdTCPP coordination polymer modification and preparation method and application thereof

A coordination polymer and electrochemical technology, applied in the direction of material electrochemical variables, etc., can solve the problems of limiting the use range of sensors and poor stability, and achieve the effect of widening the use range, low cost and good stability

Active Publication Date: 2017-08-11
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cu and Mn compounds have poor stability under acidic conditions, which limits the scope of use of the sensor to a certain extent

Method used

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  • Electrochemical sensor based on CoCuCdTCPP coordination polymer modification and preparation method and application thereof
  • Electrochemical sensor based on CoCuCdTCPP coordination polymer modification and preparation method and application thereof
  • Electrochemical sensor based on CoCuCdTCPP coordination polymer modification and preparation method and application thereof

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preparation example Construction

[0054] An electrochemical sensor modified based on CoCuCdTCPP coordination polymer and its preparation method and application, comprising the following steps:

[0055] The first step: Synthesis of metal TCPP coordination polymers, including Cu1Cd3TCPP, Cu2Cd2TCPP, Cu3Cd1TCPP, Co1Cd3TCPP1, Co2Cd2TCPP, Co3Cd1TCPP, CuCoCdTCPP;

[0056] The second step: modify the synthesized coordination polymer electrode: dissolve the synthesized metal TCPP coordination polymer in twice distilled water, and ultrasonically disperse to obtain a suspension; apply the suspension dropwise and polish it through a polishing cloth to The mirror surface was ultrasonically cleaned in double-distilled water and ethanol, and the surface of the glassy carbon electrode after drying was dried, and placed to dry at room temperature, and then fixed by dropping naphthol solution on the surface of the polymer, and air-dried at room temperature for later use to obtain a polymer matter / glassy carbon electrode; if ca...

Embodiment 1

[0061] Ligand H 2 TCPP synthesis:

[0062] Heat 160mL of propionic acid to boiling, then rapidly add pyrrole (1.38mL, 20mmol) and methyl p-formylbenzoate (3.28g, 20mmol) to the solvent in sequence, and the reaction is refluxed for 2h. After cooling down to room temperature, let stand to cool overnight. The reaction mixture was suction-filtered, washed with absolute ethanol until the filtrate was colorless, and dried to obtain a dark purple solid as H 2 TCPP-OMe crude product. Recrystallization method (CHCl 3 :methanol=1:3) to obtain pure H 2 TCPP-OMe.

[0063] Will and H 2 TCPP-OMe or (904mg, 0.1mmol) was dissolved in 30mL tetrahydrofuran solution, then 30mL NaOH aqueous solution (0.1M) was added to the reaction system, and reacted at 50°C for 48 hours. After cooling, tetrahydrofuran was removed by rotary evaporation, and the pH value of the solution was adjusted to about 2 with 0.1M HCl(aq) at room temperature. Buchner funnel suction filtration to obtain a purple soli...

Embodiment 2

[0081] Coordination polymer modified GCE and MWCNTs / GCE

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Abstract

The invention discloses an electrochemical sensor based on CoCuCdTCPP coordination polymer modification and a preparation method and application thereof. The electrochemical sensor is prepared by dispensing a CoCuCdTCPP coordination polymer turbid solution on the surface of an electrode; the CoCuCdTCPP coordination polymer comprises a dual-metal CuCdTCPP and CoCdTCPP coordination polymer and a tri-metal system CuCoCdTCPP coordination polymer. The CoCuCdTCPP coordination polymer is applied to the electrochemical sensor for the first time; due to the fact that the electrochemical sensor formed by a plurality of metal active center modified electrodes of the CoCuCdTCPP coordination polymer can effectively and stably detect nitrous acid and sodium peroxide, the response time is short, the sensitivity is high, the cost is low, and preparation is easy.

Description

technical field [0001] The invention belongs to the application field of nanometer materials, and in particular relates to an electrochemical sensor modified based on a CoCuCdTCPP coordination polymer, a preparation method and application thereof. Background technique [0002] In the last 30 years, the development speed of MOFs is astonishing, nearly 1500 structures were reported in 2002 alone. In fact, since 1978, the number of reported 3D MOFs has doubled every 3.9 years, and the number of all MOFs (i.e., materials comprising 1D, 2D, and 3D) has doubled every 5.7 years. The growth rate of Cambridge Database (CSD) is doubling every 9.3 years. The unimaginable growth of metal-organic frameworks illustrates their importance in scientific research and technology. The special physical and chemical properties of these materials make them potentially useful in the fields of gas storage and separation, heterogeneous catalysis, magnetism, polymerization optics, and sensing. More...

Claims

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Application Information

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IPC IPC(8): G01N27/30C08G83/00
CPCG01N27/30C08G83/008
Inventor 周泊丁丹
Owner NANJING NORMAL UNIVERSITY
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