Ternary covalent organic framework material and application thereof in ratio pH fluorescence sensing

A covalent organic framework, triformaldehyde technology, used in fluorescence/phosphorescence, material excitation analysis, etc., can solve the problems of inaccurate results, intensity interference, etc., and achieve the effect of strong chemical stability, low equipment requirements, and good fluorescence performance.

Pending Publication Date: 2022-04-22
SHANDONG NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Traditional fluorescent sensors usually show only one emission peak, and its intensity is easily interfered by external factors such as excitation intensity, temperature, and instrumentation, which may lead to inaccurate results

Method used

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  • Ternary covalent organic framework material and application thereof in ratio pH fluorescence sensing
  • Ternary covalent organic framework material and application thereof in ratio pH fluorescence sensing
  • Ternary covalent organic framework material and application thereof in ratio pH fluorescence sensing

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Embodiment 1

[0035] Example 1 A ternary covalent organic framework material and its application as a ratiometric pH sensor

[0036] COF HBD The structure of is shown in formula (1):

[0037]

[0038]

[0039] (a) figure 1 It is the ternary covalent organic framework material COF prepared by the present invention HBD The synthetic route map, its specific synthetic steps are as follows:

[0040] To the 5mL ampoule, add 2-hydroxybenzene-1,3,5-tricarbaldehyde (0.08mmol, 14.4mg), 5,5'-diamino-2,2'-bipyridine (0.06mmol, 11.2mg ) and 4,4'-diamino-3,3'-biphenyldicarboxylic acid (0.06mmol, 16.32mg), add o-dichlorobenzene 2mL, ultrasonically disperse evenly, add 0.2mL acetic acid aqueous solution as catalyst (6M), Perform freezing-vacuumizing-thawing, and after three cycles, seal the tube and heat it. After cooling to room temperature, the system was suction filtered and washed with tetrahydrofuran to obtain COF HBD , and the yield was 81%.

[0041] (b) Ratio fluorescence detection:

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Abstract

The invention discloses a synthetic method of a ratio pH sensor based on a ternary covalent organic framework material.According to the method, the covalent organic framework material is constructed through a ternary doping strategy of 2-hydroxybenzene-1, 3, 5-tricarboxaldehyde, 5, 5 '-diamino-2, 2'-dipyridyl and 4, 4 '-diamino-3, 3'-biphenyl dicarboxylic acid, and the ratio pH sensor based on the ternary covalent organic framework material is obtained. The fluorescent probe has a ratio response to pH in a range of 2-5.5. And the blank that no multi-covalent organic framework ratio pH sensor exists before is filled. The method disclosed by the invention is low in equipment requirement and simple in preparation method. And the prepared ternary covalent organic framework material has relatively high chemical stability and relatively high application value in the aspect of fluorescence detection. The invention also discloses an application of the ternary covalent organic framework material in ratio pH sensing.

Description

technical field [0001] The invention relates to the field of organic crystalline porous materials and ratio fluorescence sensors, in particular to a ternary covalent organic framework material and its application in ratio pH fluorescence sensing. Background technique [0002] Traditional fluorescent sensors usually show only one emission peak, and its intensity is easily interfered by external factors such as excitation intensity, temperature, and instrumentation, which may lead to inaccurate results. The ratiometric fluorescent sensor detects according to the ratio of two emission signals, and has a self-calibration function, which can overcome the shortcomings of monochromatic fluorescent sensors, so as to obtain more reliable detection results. How to construct accurate, effective, and stable RF sensors has been a hot research topic and remains challenging, which involves the fine arrangement of fluorescent modules with the same excitation wavelength but different emissio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G12/06C08G12/08G01N21/64
CPCC08G12/06C08G12/08G01N21/64
Inventor 岳婕妤宋丽苹丁秀丽王宇潼马瑜
Owner SHANDONG NORMAL UNIV
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