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CN108752298B - A kind of zinc complex and its preparation method and application - Google Patents

A kind of zinc complex and its preparation method and application Download PDF

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CN108752298B
CN108752298B CN201810731307.7A CN201810731307A CN108752298B CN 108752298 B CN108752298 B CN 108752298B CN 201810731307 A CN201810731307 A CN 201810731307A CN 108752298 B CN108752298 B CN 108752298B
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王浩
郝学敏
周文杰
郭文莉
李树新
伍一波
商育伟
杨丹
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Abstract

本发明公开了一种锌配合物及其制备方法与应用,该锌配合物的化学结构式为K4Zn2(FDA)4,其中,FAD为去质子的2,5‑呋喃二甲酸。将2,5‑呋喃二甲酸和硝酸锌混合在一起,并加入到N,N‑二甲基甲酰胺的水溶液中,搅拌10分钟,然后置于95℃的烘箱中静止48h,冷却后得到无色块状晶体;向所述无色块状晶中加入氯化钾,并置于95℃的烘箱中静止72h,从而得到所述锌配合物;该锌配合物用作识别二碘甲烷的荧光探针。本发明不仅制备工艺简单、化学组分易于控制、可重复性好、产量高,而且对二碘甲烷具有很高的灵敏度和选择性,可用作高灵敏度、高选择性的识别二碘甲烷的荧光探针。The invention discloses a zinc complex, a preparation method and application thereof. The chemical structural formula of the zinc complex is K 4 Zn 2 (FDA) 4 , wherein FAD is deprotonated 2,5-furandicarboxylic acid. 2,5-Furandicarboxylic acid and zinc nitrate were mixed together, added to the aqueous solution of N,N-dimethylformamide, stirred for 10 minutes, and then placed in an oven at 95°C for 48 hours, and after cooling, no solution was obtained. Color block crystal; potassium chloride is added to the colorless block crystal, and it is placed in an oven at 95°C for 72 hours to obtain the zinc complex; the zinc complex is used for the fluorescence recognition of diiodomethane probe. The invention not only has simple preparation process, easy control of chemical components, good repeatability and high yield, but also has high sensitivity and selectivity to diiodomethane, and can be used as a high-sensitivity and high-selectivity identification device for diiodomethane. fluorescent probes.

Description

Zinc complex and preparation method and application thereof
Technical Field
The invention relates to the technical field of fluorescent probes, in particular to a zinc complex and a preparation method and application thereof.
Background
The fluorescent probe takes a fluorescent substance as an indicator, the indicator generates fluorescence under the excitation of light with certain wavelength, and the qualitative or quantitative analysis of a detected substance is realized by detecting the generated fluorescence. Compared with the traditional detection and analysis method, the fluorescent probe has the advantages of good selectivity, good sensitivity, simple instrument, simple and convenient operation and the like, thereby being widely applied to the fields of environmental detection, biochemistry and the like. In the prior art, fluorescent probe materials for identifying small molecules have low sensitivity and poor selectivity, and have complex preparation process, uncontrollable chemical components, poor repeatability and low yield.
Disclosure of Invention
The invention provides a zinc complex, a preparation method and application thereof, aiming at solving the technical problems of low sensitivity, poor selectivity, complex preparation process, uncontrollable chemical components, poor repeatability, low yield and the like of fluorescent probe materials for identifying small molecules in the prior art.
The purpose of the invention is realized by the following technical scheme:
a zinc complex of formula C24H8O20Zn2K4Molecular weight of 903.44, and its chemical formula is K4Zn2(FDA)4Wherein FAD is deprotonated 2, 5-furandicarboxylic acid; the structure of the minimum asymmetric unit is as follows:
Figure GDA0003464535630000011
the crystal structure data of the zinc complex is shown in the following table one:
watch 1
Figure GDA0003464535630000021
A method of preparing a zinc complex comprising: mixing 2, 5-furandicarboxylic acid and zinc nitrate together, adding into an aqueous solution of N, N-dimethylformamide, stirring for 10 minutes, standing in an oven at 95 ℃ for 48 hours, and cooling to obtain colorless blocky crystals; adding potassium chloride into the colorless blocky crystal according to the proportion of 0.007-0.07 g of potassium chloride per 0.022-0.22 g of the colorless blocky crystal, and standing in an oven at 95 ℃ for 72 hours to obtain the zinc complex; wherein the proportion relation of the raw materials is as follows:
Figure GDA0003464535630000022
preferably, the structure of the zinc complex is determined by a single crystal diffractometer, and the zinc complex emits blue fluorescence under the excitation of incident light with the wavelength of 348 nm.
The zinc complex in the technical scheme is used as a fluorescent probe for identifying diiodomethane.
According to the technical scheme provided by the invention, the zinc complex provided by the invention is composed of elements or groups such as zinc, potassium, deprotonated 2, 5-furandicarboxylic acid, N-dimethylformamide and the like, and can obtain a good identification effect on diiodomethane in a plurality of organic solvents, so that the zinc complex can be used as a good fluorescent probe for identifying diiodomethane. The invention has the advantages of simple preparation process, easy control of chemical components, good repeatability and high yield, has very high sensitivity and selectivity to diiodomethane, and can be used as a fluorescent probe for identifying diiodomethane with high sensitivity and high selectivity.
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In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a schematic diagram of the minimum asymmetric unit of a zinc complex prepared in example 1 of the present invention.
FIG. 2 is a diagram showing a fluorescence spectrum of a zinc complex prepared in example 2 of the present invention.
FIG. 3 is a schematic diagram of fluorescence property detection of the zinc complex prepared in example 2 of the present invention in different solvent small molecules.
FIG. 4 is a diagram showing fluorescence intensities of zinc complexes prepared in example 2 of the present invention in different small molecules of solvents.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
The zinc complex provided by the invention, the preparation method and the application thereof are described in detail below. Details which are not described in detail in the embodiments of the invention belong to the prior art which is known to the person skilled in the art.
Example 1
A zinc complex, the preparation method comprising: mixing 0.016g of 2, 5-furandicarboxylic acid and 0.030g of zinc nitrate together, adding the mixture into 5mL of N, N-dimethylformamide aqueous solution, stirring for 10 minutes, then placing the mixture into an oven at 95 ℃ for standing for 48 hours, and cooling to obtain a solution containing colorless blocky crystals; 0.007g of potassium chloride was added to the colorless bulk crystal-containing solution containing 0.022g of colorless bulk crystals, and the mixture was left to stand in an oven at 95 ℃ for 72 hours to obtain a zinc complex C24H8O20Zn2K4
Specifically, the dimensions are selected to be 0.22X 0.20mm3Book ofThe zinc complex prepared in the embodiment 1 of the invention is subjected to single crystal structure analysis, single crystal diffraction data is collected by a German Bruker diffractometer, and Mok alpha rays are monochromatized by a graphite monochromator
Figure GDA0003464535630000041
Theta is 3.05 DEG-25.26 DEG, so that the following results are obtained: the zinc complex prepared in example 1 of the present invention belongs to monoclinic system, space groups are all C2/C, and unit cell parameters are about
Figure GDA0003464535630000042
Figure GDA0003464535630000043
α is 90 °, β is 106.869 °, and γ is 90 °. The crystal structure of the zinc complex was plotted using Diamond software to give a schematic diagram of the minimum asymmetric unit as shown in figure 1.
Example 2
A zinc complex, the preparation method comprising: mixing 0.16g of 2, 5-furandicarboxylic acid and 0.30g of zinc nitrate together, adding the mixture into 50mL of N, N-dimethylformamide aqueous solution, stirring for 10 minutes, standing the mixture in an oven at 95 ℃ for 48 hours, and cooling the mixture to obtain a solution containing colorless blocky crystals; to the colorless bulk crystal-containing solution containing 0.22g of colorless bulk crystals was added 0.07g of potassium chloride, and the mixture was left to stand in an oven at 95 ℃ for 72 hours to obtain zinc complex C24H8O20Zn2K4
Specifically, the zinc complex prepared in example 2 of the present invention was subjected to the following performance tests:
(1) a single crystal diffractometer is adopted to perform fluorescence test on the zinc complex prepared in the embodiment 2 of the invention, and the wavelength of incident light is 348nm, so that a fluorescence spectrum schematic diagram shown in figure 2 can be obtained; in FIG. 2, the abscissa is wavenumber (i.e., wavelength in nm) and the ordinate is intensity (i.e., intensity). As can be seen from fig. 2: the zinc complex prepared in the embodiment 2 of the invention emits blue fluorescence under the excitation of incident light with the wavelength of 348 nm.
(2) Nine liquid small molecules (respectively, diiodomethane, dichloromethane, dibromomethane, acetone, N-dimethylformamide, N-dimethylacetamide, ethanol, methanol and N-methylpyrrolidone) are prepared respectively to serve as the liquid to be detected. Taking 3mL of each of the nine liquid micromolecules, adding into nine 10mL reaction bottles, adding 3mg of the zinc complex prepared in the embodiment 2 into the nine reaction bottles, carrying out ultrasonic treatment for 3-4 minutes to uniformly disperse the zinc complex in the liquid to be detected, and adopting λ ex ═ 348nm consistent with a solid fluorescence test as an excitation wavelength and a slit width of 1.5nm to test the fluorescence behavior of the zinc complex in the nine reaction bottles, thereby obtaining a fluorescence performance detection schematic diagram (the abscissa represents the wavelength and the ordinate represents the relative intensity) in different solvent micromolecules as shown in FIG. 3 and a fluorescence intensity schematic diagram shown in FIG. 4. As can be seen from fig. 3 and 4: only the fluorescence quenching of the zinc complex in the reaction bottle containing the diiodomethane is obvious, and the zinc complex prepared in the embodiment 2 of the invention can be used as a fluorescence probe for specific recognition.
In conclusion, the embodiment of the invention has the advantages of simple preparation process, easy control of chemical components, good repeatability and high yield, has high sensitivity and selectivity on diiodomethane, and can be used as a fluorescent probe for identifying diiodomethane with high sensitivity and high selectivity.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (6)

1.一种锌配合物,其特征在于,其化学结构式为K4Zn2(FDA)4,其中,FAD为去质子的2,5-呋喃二甲酸;其晶胞参数为
Figure FDA0003464535620000011
α=90°,β=106.869°,γ=90°;其最小不对称单元的结构为:
1. a zinc complex, is characterized in that, its chemical structural formula is K 4 Zn 2 (FDA) 4 , wherein, FAD is deprotonated 2,5-furandicarboxylic acid; Its unit cell parameter is
Figure FDA0003464535620000011
α=90°, β=106.869°, γ=90°; the structure of the smallest asymmetric unit is:
Figure FDA0003464535620000012
Figure FDA0003464535620000012
2.根据权利要求1所述的锌配合物,其特征在于,该锌配合物的晶体结构数据如下表一所示:2. zinc complex according to claim 1, is characterized in that, the crystal structure data of this zinc complex is shown in following table 1: 表一Table I
Figure FDA0003464535620000013
Figure FDA0003464535620000013
Figure FDA0003464535620000021
Figure FDA0003464535620000021
3.一种锌配合物的制备方法,其特征在于,包括:将2,5-呋喃二甲酸和硝酸锌混合在一起,并加入到N,N-二甲基甲酰胺的水溶液中,搅拌10分钟,然后置于95℃的烘箱中静止48h,冷却后得到含无色块状晶体的溶液;按照每0.022~0.22g所述无色块状晶体使用0.007g~0.07g氯化钾的比例,向所述含无色块状晶体 的溶液中加入氯化钾,并置于95℃的烘箱中静止72h,从而得到上述权利要求1至2中任一项所述的锌配合物;3. a preparation method of zinc complex, is characterized in that, comprises: 2,5-furandicarboxylic acid and zinc nitrate are mixed together, and join in the aqueous solution of N,N-dimethylformamide, stir 10 minutes, and then placed in an oven at 95°C for 48 hours, and after cooling, a solution containing colorless bulk crystals was obtained; according to the ratio of 0.007g to 0.07g of potassium chloride per 0.022 to 0.22g of the colorless bulk crystals, Adding potassium chloride to the solution containing the colorless bulk crystals, and placing it in an oven at 95° C. for 72 hours, thereby obtaining the zinc complex according to any one of claims 1 to 2; 其中,各原料的比例关系如下:Among them, the proportional relationship of each raw material is as follows:
Figure FDA0003464535620000022
Figure FDA0003464535620000022
4.根据权利要求3所述的锌配合物的制备方法,其特征在于,所述的锌配合物为无色块状晶体。4 . The preparation method of zinc complex according to claim 3 , wherein the zinc complex is a colorless bulk crystal. 5 . 5.根据权利要求3或4所述的锌配合物的制备方法,其特征在于,采用单晶衍射仪对所述锌配合物进行测定,所述锌配合物在波长为345nm的入射光激发下,发射出蓝色荧光。5. The preparation method of zinc complex according to claim 3 or 4, characterized in that, the zinc complex is measured by a single crystal diffractometer, and the zinc complex is excited by incident light with a wavelength of 345 nm. , which emits blue fluorescence. 6.一种锌配合物的应用,其特征在于,将上述权利要求1至2中任一项所述的锌配合物用于制备识别二碘甲烷的荧光探针。6 . The application of a zinc complex, wherein the zinc complex according to any one of the above claims 1 to 2 is used to prepare a fluorescent probe for recognizing diiodomethane. 7 .
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