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Application of CoTPyP porphyran coordination polymer materials

A technology of coordination polymers and metalloporphyrins, applied in the direction of electrochemical variables of materials, etc., to achieve the effects of high sensitivity, excellent catalytic performance, and short response time

Active Publication Date: 2017-01-11
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, this kind of MOFs has an electrochemically active metal center and has pores that can accommodate small molecules such as nitrite, so it has excellent performance in electrochemical catalysis, but its application in the field of electrochemical sensors has not yet been seen. to report

Method used

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  • Application of CoTPyP porphyran coordination polymer materials
  • Application of CoTPyP porphyran coordination polymer materials
  • Application of CoTPyP porphyran coordination polymer materials

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] ①The TPyP ligand was synthesized according to the reference (Xie Minghua, Design Synthesis and Catalytic Performance of Metal-Organic Framework Materials Based on Functional Ligands[J], Zhejiang University, 2011, Ph.D. Dissertation), and the synthesis yield was 15%.

[0024] ②The TPyP ligand was synthesized according to the above references, the reaction time was changed from 2 hours to 2.5 hours, and the synthesis yield was 34%.

[0025] ③The TPyP ligand was synthesized according to the above references, the reaction time was changed from 2 hours to 2.5 hours, and Al2O3 was replaced by chromatographic silica gel, and the synthesis yield was 57%.

[0026] ④ Synthesize the TPyP ligand according to the above references, change the reaction time from 2 hours to 2.5 hours, replace Al2O3 with chromatography silica gel, perform chromatography, and replace rotary evaporation (CHCl 3 :methanol=1:1), the synthetic yield is 60%.

[0027] ⑤ Synthesize TPyP ligands according to th...

Embodiment 2

[0032] ①12.43mg TPyP and 23.84mg CoCl 2 ·6H 2 O dissolves in CH 3 COOH (4mL), H 2 O (4 mL), the resulting mixture was added to a 25 mL reactor, and then the reactor was placed in an oven at 120° C. for 3 d, no product was obtained. Filter and wash with DMF, H 2 O, washed with EtOH until the filtrate was colorless, and then dried in an oven at 50°C.

[0033] ②12.43mg TPyP and 23.84mg CoCl 2 ·6H 2 O dissolves in CH 3 COOH (4mL), H 2 O (4 mL) and KOH (1M, 0.1 mL) were added to the resulting mixture into a 25 mL reactor, and then the reactor was placed in an oven at 120° C. for 3 days to obtain a purple powder. Filter and wash with DMF, H 2 O and EtOH were washed until the filtrate was colorless, and then dried in an oven at 50° C., the yield was 37%.

[0034] ③12.43mg TPyP and 23.84mg CoCl 2 ·6H 2 O dissolves in CH 3 COOH (4mL), H 2 O (4 mL) and KOH (1M, 0.2 mL) were added to the resulting mixture into a 25 mL reactor, and then the reactor was placed in an oven at 1...

Embodiment 3

[0040] ①Put 0.20g of graphite powder and 2mg of CoTPyP in an agate mortar and grind for about 20min, make them fully mixed, then add 0.115mL of liquid paraffin and grind to a uniform paste. Then the prepared paste was filled into a plastic tube with an inner diameter of 3 mm, compacted, and a copper wire was inserted as a wire to obtain a CoTPyP carbon paste electrode.

[0041] ② 0.20g of graphite powder and 2mg of CoTPyP were ground in an agate mortar for about 30 minutes, mixed thoroughly, and then 0.115mL of liquid paraffin was added and ground to a uniform paste. Then the prepared paste was filled into a plastic tube with an inner diameter of 3 mm, compacted, and a copper wire was inserted as a wire to obtain a CoTPyP carbon paste electrode. Bare carbon paste electrodes without CoTPyP can also be prepared by the same method. CoTPyP / CPE was tested by cyclic voltammetry in the range of -1.0-1.2V.

[0042] ③ 0.30g of graphite powder and 2mg of CoTPyP were ground in an agate...

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Abstract

The invention discloses application of CoTPyP porphyran coordination polymer materials. According to the application, CoTPyP porphyran coordination polymers are prepared into a carbon paste electrode; the carbon paste electrode is used as an electrochemical sensor to be applied to nitrite electrocatalysis, wherein the chemical formula of the CoTPyP porphyran coordination polymers is [Co(TPyP)]6 12CH3COOH 12 H2O. The electrocatalysis effect of the electrochemical sensor on nitrite is studied; the result shows that the sensor has better performance; the minimum detection limit is 2.0*10<8>M; the sensitivity is 743.3mA mol<-1> L cm<-2>; the linear range is 2.5*10<-6> to 5.5*10<-4>M, wherein R is 0.993; the surface has the characteristics of high sensitivity, short response time and the like; certain application values are realized in the aspect of electrochemical sensing.

Description

technical field [0001] The invention relates to the application of a CoTPyP metalloporphyrin coordination polymer material with a porous nanostructure, belonging to the field of nanomaterial applications. Background technique [0002] Nitrite can be used as preservatives and additives, and widely exists in food, environment and physiological systems. Nitrite can react with amino groups to generate nitrosamines with strong carcinogenic effect, which seriously threatens human health. With the continuous strengthening of people's awareness of food safety and the environment, accurate detection of nitrite has become an important item in food analysis and environmental testing. There are many methods to detect nitrite in analytical chemistry. At present, there are mainly the following types: spectrophotometry, colorimetry, chemiluminescence, fluorescence, high performance liquid chromatography [24] etc. These methods are relatively expensive, complicated, and time-consuming. E...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30
CPCG01N27/30
Inventor 潘竞雄史丽梅周泊
Owner NANJING NORMAL UNIVERSITY
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