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Application of a triazine-tripyrazole compound in anion detection

A technology of triazine tripyrazole and oxazine tripyrazole, which is applied in the field of anion detection and can solve the problems of being unidentifiable and unidentifiable

Active Publication Date: 2022-05-10
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in the existing reports, some compounds only have good recognition for halide ions, but for NO 3 - 、PO 4 3- , SO 4 2- unrecognizable
And in some cases, once the concentration of the anion to be tested is low, it cannot be identified

Method used

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  • Application of a triazine-tripyrazole compound in anion detection
  • Application of a triazine-tripyrazole compound in anion detection
  • Application of a triazine-tripyrazole compound in anion detection

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Embodiment 1

[0024] This embodiment provides a triazine tripyrazole compound with the following structural formula:

[0025]

[0026] Its preparation method comprises the following steps:

[0027] (1) 4-pyrazole boronic acid pinacol ester (10g, 51.5mmol) and 3,4-dihydro-2H-pyran (4.79g, 57mmol) in 25mL toluene solution with trifluoroacetic acid (591mg, 5.2mmol ) as a catalyst, heated and refluxed at 95°C for overnight reaction, and rotary evaporated to obtain 1-(tetrahydropyran-2-yl)-3-(4,4,5,5-tetramethyl-[1,3,2] Dioxin-2-yl)-1H-pyrazole (8.45 g, 19.6 mmol), 59% yield.

[0028] (2) Add 4-bromooxynil (1092mg, 6.0mmol) into a 50mL Slinky bottle, dissolve it with 15mL chloroform solution, slowly add trifluoromethanesulfonic acid (534μL, 2.0mmol) dropwise under ice bath, and Under protection, react at room temperature for 10-15 hours, and then react at 50°C for one day to obtain a white solid (950 mg, 1.74 mmol), namely 2,4,6-tris(4-bromo-phenyl)-1,3,5 - Triazine, yield 87%.

[0029] (...

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Abstract

The invention provides an application of a triazine tripyrazole compound in anion detection, the triazine tripyrazole compound being 2,4,6-tri(4-(1H-pyrazole-4-yl)phenyl) ‑1,3,5‑triazine with the formula C 30 h 21 N 9 , the structural formula is shown in formula (I); The anion is NO 3 ‑ , Cl ‑ 、PO 4 3‑ , SO 4 2‑ or CF 3 COO ‑ . The triazine tripyrazole compound of the present invention uses the [N-H between the end pyrazoles ... Based on N] bonds, porous molecular crystals are self-assembled through hydrogen bonds, and this three-dimensional network structure will generate hydrogen bonds with anions, which are effective for NO 3 ‑ , Cl ‑ 、PO 4 3‑ , SO 4 2‑ 、CF 3 COO ‑ Anions have a distinct response, making it easier and quicker to identify these anions.

Description

technical field [0001] The present invention relates to the field of anion detection, more specifically, relates to the application of a triazine tripyrazole compound in anion detection. Background technique [0002] Anion detection is of great significance in actual production and life. For example, the detection of chloride ion, nitrate ion or sulfate ion in drinking water. Nitrate is the most stable nitrogen compound among various forms of nitrogen-containing compounds in an aerobic environment. After human ingestion, nitrate is transformed into Poisoning occurs due to nitrite; a certain amount of sulfate can cause diarrhea. Another example is the detection of anions in sewage. For example, if the content of nitrate ions or phosphate ions is too much, it will easily cause eutrophication of the water body after discharge, resulting in an imbalance in the distribution of species in the water ecosystem, thereby affecting human survival. Although some cases ultimately requi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/78G01N21/82
CPCG01N21/78G01N21/82
Inventor 于澍燕张梦思童金
Owner BEIJING UNIV OF TECH