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A multifunctional fluorescent recognition ag coordination polymer and its preparation method and application

A coordination polymer and fluorescence recognition technology, which is applied in the direction of fluorescence/phosphorescence, chemical instruments and methods, luminescent materials, etc., can solve the problems of fluorescence quenching, luminous body affecting luminous performance, high reaction temperature, etc., and achieve the effect of simple method

Active Publication Date: 2021-06-08
SOUTH CHINA AGRI UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the traditional preparation method of inorganic fluorescent materials is high-temperature solid-phase method, but with the rapid update of new technologies, the improvement of performance indicators of luminescent materials needs to overcome the inherent defects of classical synthesis methods, such as high reaction temperature, large particle size and Uneven distribution, destruction of the crystal form of the luminescent body after calcining and crushing affects the luminescent performance, and it is difficult to obtain spherical particles, etc.; there are many kinds of organic small molecule luminescent materials in organic fluorescent materials, and most of them have conjugated heterocycles and various chromophores. The structure is easy to adjust, and its conjugation length can be changed by introducing unsaturated groups such as ethylenic bonds, benzene rings, and various chromophores, thereby changing its optical properties, but small molecule luminescent materials are prone to fluorescence in the solid state Quenching phenomenon

Method used

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  • A multifunctional fluorescent recognition ag coordination polymer and its preparation method and application
  • A multifunctional fluorescent recognition ag coordination polymer and its preparation method and application
  • A multifunctional fluorescent recognition ag coordination polymer and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A coordination polymer crystal material Ag( mu -bza)( mu -bpa), prepared by the following steps:

[0036] 0.025mmol Ag 2 O was added to 2 mL of fresh NH 3 ·H 2 Dissolve in O, add 0.05mmol benzoic acid to 2mL absolute ethanol and ultrasonically dissolve, take 0.025mmol bpa ligand and add it to 10mL absolute ethanol to ultrasonically dissolve, then add the ethanol solution of benzoic acid and bpa ligand Stir in the silver ammonia solution for 30 minutes; after the stirring, filter the resulting solution to obtain a colorless and transparent filtrate; seal it with plastic wrap and tie 4-7 small holes, and naturally volatilize at room temperature for 7 days to obtain light yellow block crystals and Longer storage time and 42% yield (based on bpa ligand).

[0037] Elemental analysis theoretical value of the crystal material: C 31 h 21 AgN 2 o 2 : C 66.32%, H 3.77%, N 4.99%; actual value: C 66.24%, H 3.91%, N 4.85%. IR (KBr, cm −1 ): 3401w, 3055w, 1594s, 1551s, 144...

Embodiment 2

[0046] The crystal material [Ag( mu -bza)( mu -bpa)] ground into powder, take 20mg sample and soak in water, carry out powder X-ray diffraction to the sample of reclaiming after 7 days, image 3 It shows that in the environment where the sample exists in aqueous solution, the frame still maintains the original stable state, which provides convenience for use in the living environment.

Embodiment 3

[0048] Weigh 2 mg of powdery crystal material Ag ( mu -bza)( mu -bpa) into different organic small molecule solvents (1,4-dioxane, acetone, isobutanol, ethyl acetate, ethanol, dichloromethane, N, N-dimethylformamide, xylene , acetonitrile, dimethyl sulfoxide, methanol, and nitrobenzene), ultrasonication for about 10 minutes, and liquid fluorescence test.

[0049] Samples of the same mass were also added to aqueous solutions of nitrates containing different metal ions (concentration of 0.01 mol L -1 ) medium (magnesium nitrate, potassium nitrate, cadmium nitrate, sodium nitrate, zinc nitrate, cobalt nitrate, copper nitrate, silver nitrate, nickel nitrate and iron nitrate), ultrasound for about 30 minutes, liquid fluorescence test.

[0050] Samples of the same mass were also added to aqueous solutions of potassium salts containing different anions (concentration of 0.01mol L -1 ) (potassium nitrate, potassium sulfate, potassium acetate, potassium chloride, potassium bromide, ...

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Abstract

The invention belongs to the technical field of optical materials, and in particular relates to a multifunctional fluorescent recognition Ag coordination polymer Ag( mu -bza)( mu ‑bpa), is a crystal material, triclinic system, P ‑1 space group, the molecular formula of the smallest asymmetric unit is Ag( mu -bza)( mu ‑bpa), the chemical formula is C 31 h 21 AgN 2 o 2 ; each smallest asymmetric unit contains a crystallographically independent Ag + , a bpa ligand and a bza ‑ counter anion. The coordination polymer of the present invention emits strong blue light under the irradiation of ultraviolet light, combined with fluorescence properties, it can be used as a sensor to detect and identify toxic small organic molecules and polluting ions Fe 3+ 、Cr 2 o 7 2‑ . The invention also provides a preparation method thereof, which is simple in operation, high in yield, cost-saving and beneficial to industrialized production.

Description

technical field [0001] The invention belongs to the technical field of optical materials, and in particular relates to a multifunctional fluorescent recognition Ag coordination polymer Ag( mu -bza)( mu -bpa) and its preparation method and application. Background technique [0002] With the rapid advancement of science and technology, people are paying more and more attention to fluorescence phenomena, and the application range of fluorescent materials is also becoming wider and wider. Fluorescent materials can be divided into various types, including inorganic fluorescent materials and organic fluorescent materials. Among them, the traditional preparation method of inorganic fluorescent materials is high-temperature solid-phase method, but with the rapid update of new technologies, the improvement of performance indicators of luminescent materials needs to overcome the inherent defects of classical synthesis methods, such as high reaction temperature, large particle size a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00C09K11/06G01N21/64
CPCC08G83/008C09K11/06C09K2211/188G01N21/6428G01N2021/6432
Inventor 刘维陈丛丛吴云当倪春林张静徐奕琳陈克来
Owner SOUTH CHINA AGRI UNIV
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