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A Cu(i)-based fluorescent metal-organic framework and its preparation method and application

An organic framework and metal-based technology, applied in the field of fluorescence sensing, can solve problems such as fluorescence quenching of fluorescent agents, and achieve the effects of good reproducibility, good stability, and simple preparation methods

Active Publication Date: 2020-06-05
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this detection technology has the disadvantage of low selectivity, because a variety of substances may cause the fluorescence quenching of the fluorophore, so it is a challenge to develop a highly selective colorimetric sensor.

Method used

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  • A Cu(i)-based fluorescent metal-organic framework and its preparation method and application
  • A Cu(i)-based fluorescent metal-organic framework and its preparation method and application
  • A Cu(i)-based fluorescent metal-organic framework and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1, preparation of Cu(I)-based fluorescent metal-organic framework:

[0036] Accurately weighed CuI (3.8 mg, 0.02 mmol) was dissolved in 4 ml of acetonitrile to form the first solution. Accurately weigh Hdmpymt (2.8 mg, 0.02 mmol) and dissolve it in 4 ml of ethanol solution to form a second solution. The two solutions were blended and stirred magnetically at room temperature for 15 minutes; then the mixture was transferred to a reaction kettle, reacted at 80°C for 3 days, and finally cooled to room temperature at 5°C / hour to obtain yellow granular crystals, which were filtered and After washing and collecting, the target Cu(I)-based metal-organic framework was obtained.

Embodiment 2

[0037] Example 2, Cu(I)-based metal-organic framework crystallographic structure parameters

[0038] The crystal structure of the Cu(I)-based metal-organic framework obtained in Example 1 was determined as follows: a single crystal with a suitable size was selected under a microscope for X-ray single crystal structure analysis. The X-ray diffraction data of crystals were collected by German Bruker Smart-Apex CCD surface detection X-ray single crystal diffractometer, using Mo-Kα target, measured at room temperature. Data reduction and structural elucidation were performed using the SHELXTL-97 program. The main crystallographic data of Cu(I)-based MOFs are listed in Table 1.

[0039] Table 1. Crystallographic structural parameters of Cu(I)-based MOFs

[0040]

Embodiment 3

[0041] Example 3, Experimental operation of Cu(I)-based metal-organic framework sensing nitrobenzene:

[0042] (1) Weigh 2 mg of Cu(I)-based metal-organic frameworks and disperse them in the same volume (4ml) of acetone, acetonitrile, methanol, water, formaldehyde, ethanol, n-butanol, ethylene glycol, N, N- Dimethylformamide, N,N-dimethylacetamide, tetrahydrofuran, chloroform, dichloromethane, benzene and nitrobenzene, and then sonicated for 30 minutes. Finally, the solvent emulsion is subjected to fluorescence spectrometry and color reaction under ultraviolet light (see Figure 5 with 6 ). When the excitation wavelength is 438nm, the solvent emulsions all have fluorescence emission at 590nm.

[0043] (2) every interval of 20nm, by changing the excitation wavelength, the fluorescence quenching emulsion is carried out to measure the fluorescence spectrum, and observe the influence of the excitation wavelength on the fluorescent substance in the quenching emulsion (see Figu...

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Abstract

The invention belongs to the technical field of fluorescent sensing, and particularly discloses a Cu(I)-based fluorescent metal organic skeleton, and a preparation method and application thereof. TheCu(I)-based fluorescent metal organic skeleton is applied to detection of nitrobenzene by fluorescence sensing. The chemical formula of the Cu(I)-based fluorescent metal organic skeleton is {(Cu2I2)2[Cu6(dmpymt)6]}n; the Cu(I)-based fluorescent metal organic skeleton contains two basic units, namely, Cu6S6 and Cu2I2; the metal organic skeleton which is constructed on the basis of the two units isfound for the first time, and has certain innovative significance and research value. The compound is prepared through a solvothermal method, is simple in process, high in purity and high in reproducibility, and has an obvious sensing effect on nitrobenzene; moreover, a specific phenomenon that fluorescence is recovered again after being quenched can be achieved by changing excitation wavelength;the compound has obvious selectivity on the detection of the nitrobenzene. A colorimetric fluorescent membrane based on the compound is simple in preparation method and high in stability, can be recycled, and helps to practical application.

Description

technical field [0001] The invention belongs to the technical field of fluorescent sensing, and in particular relates to a Cu(I)-based fluorescent metal organic framework, a preparation method and application thereof, and is used for fluorescent sensing to detect nitrobenzene. Background technique [0002] With the continuous development of industrial economy, environmental pollution has become a major problem that needs to be solved urgently in today's society. As an intermediate in organic synthesis, nitrobenzene is widely used in the production of dyes, spices, explosives and other organic synthesis industries. Due to the strong toxicity of nitrobenzene, inhalation, ingestion or skin absorption can cause personnel poisoning. Typical symptoms of poisoning are shortness of breath, dizziness, nausea, fainting, confusion, bluish skin, and eventually death from respiratory failure. Therefore, it is particularly important to seek an efficient and economical method for the det...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00C09K11/06G01N21/64
Inventor 宋江锋周瑞莎辛利东温慧芳姚瑞超张雯
Owner ZHONGBEI UNIV
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