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9-ethyl-3-carbazolmethylene-carbazolhydrazone and application thereof in detecting content of nitrite ion in solution

A technology of carbazole methylene and carbazole hydrazone, applied in the field of carbazole derivatives

Inactive Publication Date: 2008-04-30
ZHONGBEI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem of real-time detection of nitrite ions in the measurement solution existing in the prior art, the present invention provides a 9-ethyl-3-carbazole methylene-carbazole hydrazone and its ability to detect nitrite Application of content in ionic solution

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  • 9-ethyl-3-carbazolmethylene-carbazolhydrazone and application thereof in detecting content of nitrite ion in solution
  • 9-ethyl-3-carbazolmethylene-carbazolhydrazone and application thereof in detecting content of nitrite ion in solution
  • 9-ethyl-3-carbazolmethylene-carbazolhydrazone and application thereof in detecting content of nitrite ion in solution

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Embodiment Construction

[0034] A kind of 9-ethyl-3-carbazole methylene-carbazole hydrazone, its molecular structure can be determined as follows by mass spectrometry analysis (Fig. 7):

[0035]

[0036] A preparation method of 9-ethyl-3-carbazole methylene-carbazole hydrazone,

[0037] 9-Ethyl-3-formylcarbazole: Add 10.0g 9-ethylcarbazole, 15ml dimethylformamide, and 100ml chlorobenzene into a three-necked flask, heat and stir in a water bath at 70-75°C, and drop Add 10ml of phosphorus oxychloride, react for 5h, remove the solvent by steam distillation, and then recrystallize with absolute ethanol to obtain a yellow crystal product, 8.6g, yield 75%, mp 86-88°C.

[0038] 9-Nitrosocarbazole: 10.0g carbazole was dissolved in 150ml absolute ethanol, and 4.2g NaNO was added in batches in an ice bath 2 , Added dropwise 12ml of concentrated hydrochloric acid with stirring, resulting in a yellow precipitate. Filter, wash with water, and dry to obtain 9.0 g of a yellow powder product, with a yield of 77%...

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Abstract

The invention relates to a carbazole derivative, specifically a 9-ethyl-3-carbazole methylene-carbazole hydrazone and its application in detecting the content of nitrite ions in a solution. The problem of real-time detection of nitrite ions in the measurement solution existing in the prior art is solved. The molecular structure of 9-ethyl-3-carbazole methylene-carbazole hydrazone is as follows. 9-ethyl-3-carbazole methylene-carbazole hydrazone is used to detect the content of nitrite ion in the solution. High sensitivity, good reproducibility and reversibility.

Description

technical field [0001] The invention relates to a carbazole derivative, specifically a 9-ethyl-3-carbazole methylene-carbazole hydrazone and its application in detecting the content of nitrite ions in a solution. Background technique [0002] NO 2 - It is an important precursor of carcinogen N-nitrosamine, so the determination of NO 2 - It is an important item for testing and monitoring of water quality, environment, food, etc. At present, the determination of NO at home and abroad 2 - The standard method is the diazo coupling colorimetric method. Although this method has high sensitivity and selectivity, the stability of the reagents used and the color reaction is poor, and the reagent itself and the products after the reaction are very toxic. Carcinogens, while copper ions (Cu 2+ ), iron ions (Fe 3+ ), sulfide ion (S 2- ), iodide ion (I - ), etc. will interfere with the determination, thus affecting the accuracy of the measurement results. The methods reported i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D209/88G01N21/64
Inventor 杨云峰乔传萍胡国胜焦晨旭焦东旭
Owner ZHONGBEI UNIV