CN109433159B - Cobalt coordination polymer iodine vapor load material and preparation method and application thereof - Google Patents
Cobalt coordination polymer iodine vapor load material and preparation method and application thereof Download PDFInfo
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Abstract
The invention discloses a cobalt coordination polymer iodine vapor load material and a preparation method and application thereof, belonging to the technical field of preparation of complexes. The space group of the iodine vapor load material of the Co coordination polymer is P21C, by reacting thiophene-2, 5-dicarboxylic acid ligands with Co2+The soluble salt is prepared by reaction; the chemical formula is as follows: [ Co ] A3(tdc)3(DMF)3]DMF, asymmetric unit comprising three Co2+Ion, three thiophene-2, 5-dicarboxylic acid ions and three coordinated DMF molecules. Experimental results show that the cobalt coordination polymer iodine vapor load material prepared by the method has the function of quickly capturing and releasing iodine vapor, has large iodine vapor capturing amount, and can be used as an iodine vapor load material.
Description
Technical Field
The invention belongs to the technical field of preparation of complexes, and particularly relates to a cobalt coordination polymer iodine vapor load material, and a preparation method and application thereof.
Background
Nuclear power is a clean and reliable energy source and can meet the increasing global energy demand. Therefore, proper management of nuclear waste has become a major safety issue in nuclear power production. As is well known in the art,129i and131i is an important radioisotope in nuclear waste.129I isA dangerous species, which has a relatively long half-life (1.57 x 107 years) and is bioaccumulating, must be captured and reliably stored by effective means. Although it is not limited to131I is a short-lived (half-life of 8.02 days) radionuclide, but due to its high volatility, it has a direct effect on the metabolic processes of the human body,131immediate capture of I is still necessary. At present I2Trapping techniques rely primarily on natural or synthetic zeolites, e.g. Ag0 faujasite or mordenite, and other adsorbents, e.g. Ag+Impregnated silica and alumina, activated carbon or graphene aerogels and powders, all due to their absorption of I2Is well known for its ability to do so. However, their main drawback is the expensive and/or inefficient recovery, which cannot be reused. There is a recent need to find compounds with fast acquisition I2And reusable materials.
Disclosure of Invention
The invention aims to provide a cobalt coordination polymer iodine vapor load material, a preparation method and application thereof, and solves the problem of the existing capture I2Expensive materials and inefficient recovery.
The invention is realized by the following technical scheme:
a cobalt coordination polymer iodine vapor supporting material, said cobalt coordination polymer iodine vapor supporting material having the formula: [ Co ] A3(tdc)3(DMF)3]2 DMF; wherein tdc is thiophene-2, 5-dicarboxylic acid, and DMF is N, N-dimethylformamide.
More preferably, the cobalt coordination polymer iodine vapor supporting material comprises a trinuclear unit and a binuclear unit;
the trinuclear unit consists of oxygen atoms on eight different thiophene-2, 5-dicarboxylic acid carboxyl groups and three Co2+Connection formation;
the binuclear unit is composed of oxygen atoms on three different thiophene-2, 5-dicarboxylic acid carboxyl groups and oxygen atoms on three different DMF molecules and two Co2+The connection is formed.
More preferably, the trinuclear unit contains three Co2+The ions, named Co1 and two Co4, Co1 and Co4 all adopt a coordination mode of six coordination, in which Co1 is respectively linked with ions from six different sitesCoordinating with six carboxyl oxygen atoms on the thiophene-2, 5-dicarboxylic acid; one Co4 coordinated to six carboxyl oxygen atoms from four different thiophene-2, 5-dicarboxylic acids, respectively, and the other Co4 coordinated to six carboxyl oxygen atoms from four different thiophene-2, 5-dicarboxylic acids, respectively;
the dual core unit comprises two Co2+Ions, named as Co2 and Co3, Co2 and Co3 all adopt a six-coordinate coordination mode, wherein Co2 is respectively coordinated with six carboxyl oxygen atoms from four different thiophene-2, 5-dicarboxylic acids; co3 coordinated with three carboxyl oxygen atoms from three different thiophene-2, 5-dicarboxylic acids and three oxygen atoms from DMF molecules, respectively.
More preferably, the thiophene-2, 5-dicarboxylic acid ionic ligand adopts the following coordination mode: (η)1-η1)-(η2-η1)-μ4、(η2)-(η2)-μ2And (η)1-η1)-(η1-η1)-μ4(ii) a By (eta)1-η1)-(η2-η1)-μ4。
More preferably, the iodine vapor supporting material of the cobalt coordination polymer is of Monoclinic crystal system, and the space group is P21C, unit cell parameter is
α＝90°，β＝102.85(2)°,γ＝90°,
Z＝4。
The invention also discloses a preparation method of the cobalt coordination polymer iodine vapor load material, which comprises the following steps:
1) according to Co2+The molar ratio of soluble salt, thiophene-2, 5-dicarboxylic acid and N, N-dimethylformamide is 10:10:1, Co is weighed2+A solution of soluble salts of thiophene-2, 5-dicarboxylic acid and N, N-dimethylformamide;
2) mixing Co2+Dissolving the soluble salt in N, N-dimethyl formamide solution, adding thiaTransferring the solution of the thiophene-2, 5-dicarboxylic acid into a reaction kettle;
3) and sealing the reaction kettle, keeping the temperature constant at 373K for 48h, slowly cooling to room temperature, filtering and washing to obtain purple transparent flaky crystals, namely the cobalt coordination polymer iodine vapor load material.
More preferably, Co2+The soluble salt of (A) is cobalt chloride, cobalt sulfate or cobalt nitrate.
More preferably, the washing is with fresh DMF solvent.
The invention also discloses application of the cobalt coordination polymer iodine vapor load material as an iodine capture agent, an iodine release agent or an iodine storage agent.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention discloses a Co coordination polymer iodine vapor load material, which utilizes thiophene-2, 5-dicarboxylic acid as a ligand and Co2+The repeating unit of the coordination polymer is an asymmetric unit which comprises three Co2 +Three thiophene-2, 5-dicarboxylic acid ions and three coordinated DMF molecules; the ultraviolet spectrometer test shows that the polymer has the function of rapidly capturing and releasing iodine vapor, and the capturing amount of the iodine vapor is large.
The invention discloses a preparation method of a Co coordination polymer iodine vapor load material, which comprises the steps of firstly, Co2+The soluble salt is dissolved in DMF solution, then thiophene-2, 5-dicarboxylic acid is added, and sealing reaction is carried out, so that the Co coordination polymer is finally obtained, the appearance of the Co coordination polymer is purple transparent flaky crystal, and the Co coordination polymer is tasteless and insoluble in organic solvent and water, and has the advantages of simple process, low cost, good repeatability and the like.
The cobalt coordination polymer disclosed by the invention can quickly capture, release or store iodine vapor, can be used as an iodine vapor load material, and can be repeatedly used.
Drawings
FIG. 1 is a complex [ Co ]3(tdc)3(DMF)3]Asymmetric unit structure of DMF;
FIG. 2 is a complex [ Co ]3(tdc)3(DMF)3]Structure of the metal ion coordination mode of DMF; wherein, diagram A is a metal ion coordination mode structure diagram of a trinuclear unit, diagram B is a metal ion coordination mode structure diagram of a binuclear unit;
FIG. 3 is a complex [ Co ]3(tdc)3(DMF)3]Ligand coordination pattern scheme of DMF; wherein, graph A is (η)1-η1)-(η2-η1)-μ4The structure of the coordination pattern, diagram B is (η)2)-(η2)-μ2The structure of the coordination pattern, diagram C is (η)1-η1)-(η1-η1)-μ4A coordination mode structure diagram;
FIG. 4 shows a complex [ Co ]3(tdc)3(DMF)3]Two-dimensional structure diagram and (3,6) -connected kgd topology diagram of DMF; FIG. 4A is the complex [ Co ]3(tdc)3(DMF)3]Two-dimensional structure diagram of DMF, FIG. 4B is (3,6) -connected kgd topology diagram;
FIG. 5 is a complex [ Co ]3(tdc)3(DMF)3]Three-dimensional structure diagram and (4,8) -connected flu topology diagram of DMF; FIG. 5A is the complex [ Co ]3(tdc)3(DMF)3]Three-dimensional structure diagram of DMF, FIG. 5B is (4,8) -connected flu topology;
FIG. 6 is a complex [ Co ]3(tdc)3(DMF)3]Powder diffraction pattern of DMF, as synthesized represents the results of polymer experiments, and simulated represents the results of single crystal simulation;
FIG. 7 is a complex [ Co ]3(tdc)3(DMF)3]Thermogravimetric analysis of DMF;
FIG. 8 is a complex [ Co ]3(tdc)3(DMF)3]DMF carbon dioxide adsorption and desorption; ads represents the adsorption curve of carbon dioxide, and Des represents the desorption curve of carbon dioxide;
FIG. 9 is a complex [ Co ]3(tdc)3(DMF)3]Crystal immersion I of DMF2A photograph showing a color change when in vapor;
FIG. 10 is the complex [ Co ]3(tdc)3(DMF)3]When DMF crystals are immersed in ethanol, I2A photograph of the color change during release;
FIG. 11 is a complex [ Co ]3(tdc)3(DMF)3]Immersion of DMF crystals in ethanol I2Graph of UV/vis absorption spectra over time for the release process;
FIG. 12 is I2Captured TG plots;
FIG. 13 is a graph of iodine vapor release at 298K versus time;
FIG. 14 is a graph showing the maximum release of iodine vapor at 298K as a function of cycle number.
Detailed Description
The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.
Example 1
A preparation method of a cobalt coordination polymer iodine vapor load material comprises the following steps:
1) 54.746mg of cobalt nitrate, namely 0.2mmol of cobalt nitrate, 34.4mg of thiophene-2, 5-dicarboxylic acid, namely 0.2mmol of thiophene-2, 5-dicarboxylic acid and 10ml of DMF solution, namely 0.02mmol of DMF are weighed according to the molar ratio of the cobalt nitrate to the thiophene-2, 5-dicarboxylic acid to the DMF of 10:10: 1;
2) dissolving cobalt nitrate in a DMF solution, transferring the solution into a reaction kettle, and adding thiophene-2, 5-dicarboxylic acid into the reaction kettle;
3) and sealing the reaction kettle, keeping the temperature constant at 373K for 48h, slowly cooling to room temperature, filtering, and washing with a DMF (dimethyl formamide) solution to obtain a purple transparent flaky crystal, namely the Co coordination polymer.
The invention utilizes thiophene-2, 5-dicarboxylic acid as a ligand to prepare a coordination polymer of cobalt with cobalt nitrate by a solvothermal method, has the appearance of a purple transparent flaky crystal, is tasteless and insoluble in organic solvents and water, and has the advantages of simple process, low cost, good repeatability and the like.
Example 2
A preparation method of a cobalt coordination polymer iodine vapor load material comprises the following steps:
1) 82.119mg of cobalt nitrate, namely 0.3mmol of cobalt nitrate, 51.6mg of thiophene-2, 5-dicarboxylic acid, namely 0.3mmol of thiophene-2, 5-dicarboxylic acid and 15ml of DMF solution, namely 0.03mmol of DMF are weighed according to the molar ratio of the cobalt nitrate to the thiophene-2, 5-dicarboxylic acid to the DMF of 10:10: 1;
2) dissolving cobalt nitrate in a DMF solution, transferring the solution into a reaction kettle, and adding thiophene-2, 5-dicarboxylic acid into the reaction kettle;
3) and sealing the reaction kettle, keeping the temperature constant at 373K for 48h, slowly cooling to room temperature, filtering, and washing with a DMF (dimethyl formamide) solution to obtain a purple transparent flaky crystal, namely the Co coordination polymer.
Example 3
A preparation method of a cobalt coordination polymer iodine vapor load material comprises the following steps:
1) 109.492mg of cobalt nitrate, namely 0.4mmol of cobalt nitrate, 68.8mg of thiophene-2, 5-dicarboxylic acid, namely 0.4mmol of thiophene-2, 5-dicarboxylic acid and 20ml of DMF solution, namely 0.04mmol of DMF are weighed according to the molar ratio of the cobalt nitrate to the thiophene-2, 5-dicarboxylic acid to the DMF of 10:10: 1;
2) dissolving cobalt nitrate in a DMF solution, transferring the solution into a reaction kettle, and adding thiophene-2, 5-dicarboxylic acid into the reaction kettle;
3) and sealing the reaction kettle, keeping the temperature constant at 373K for 48h, slowly cooling to room temperature, filtering, and washing with a DMF (dimethyl formamide) solution to obtain a purple transparent flaky crystal, namely the Co coordination polymer.
Example 4
A preparation method of a cobalt coordination polymer iodine vapor load material comprises the following steps:
1) according to the molar ratio of cobalt chloride, thiophene-2, 5-dicarboxylic acid and DMF being 10:10:1, 47.6mg of cobalt chloride, namely 0.2mmol of cobalt chloride, 34.4mg of thiophene-2, 5-dicarboxylic acid, namely 0.2mmol of thiophene-2, 5-dicarboxylic acid and 10mL of DMF solution, namely 0.02mmol of DMF are weighed;
2) dissolving cobalt chloride in a DMF solution, transferring the solution into a reaction kettle, and adding thiophene-2, 5-dicarboxylic acid into the reaction kettle;
3) and sealing the reaction kettle, keeping the temperature constant at 373K for 48h, slowly cooling to room temperature, filtering, and washing with a DMF (dimethyl formamide) solution to obtain a purple transparent flaky crystal, namely the Co coordination polymer.
Example 5
A preparation method of a cobalt coordination polymer iodine vapor load material comprises the following steps:
1) according to the molar ratio of the cobalt chloride to the thiophene-2, 5-dicarboxylic acid to the DMF being 10:10:1, weighing 95.2mg of cobalt chloride, namely 0.4mmol of cobalt chloride, 68.8mg of thiophene-2, 5-dicarboxylic acid, namely 0.4mmol of thiophene-2, 5-dicarboxylic acid and 20mL of DMF solution, namely 0.04mmol of DMF;
2) dissolving cobalt chloride in a DMF solution, transferring the solution into a reaction kettle, and adding thiophene-2, 5-dicarboxylic acid into the reaction kettle;
3) and sealing the reaction kettle, keeping the temperature constant at 373K for 48h, slowly cooling to room temperature, filtering, and washing with a DMF (dimethyl formamide) solution to obtain a purple transparent flaky crystal, namely the Co coordination polymer.
The invention uses thiophene-2, 5-dicarboxylic acid as ligand to prepare the coordination polymer of cobalt with cobalt chloride by a solvothermal method, the appearance of the coordination polymer is purple transparent flaky crystal, and the coordination polymer is tasteless and insoluble in organic solvent and water.
Example 6
A preparation method of a cobalt coordination polymer iodine vapor load material comprises the following steps:
1) according to the molar ratio of the cobalt sulfate to the thiophene-2, 5-dicarboxylic acid to the DMF being 10:10:1, weighing 56.23mg of cobalt sulfate, namely 0.2mmol of cobalt sulfate, 34.4mg of thiophene-2, 5-dicarboxylic acid, namely 0.2mmol of thiophene-2, 5-dicarboxylic acid and 10ml of DMF, namely 0.02mmol of DMF;
2) dissolving cobalt sulfate in a DMF solution, transferring the solution into a reaction kettle, and adding thiophene-2, 5-dicarboxylic acid into the reaction kettle;
3) and sealing the reaction kettle, keeping the temperature constant at 373K for 48h, slowly cooling to room temperature, filtering, and washing with a DMF (dimethyl formamide) solution to obtain a purple transparent flaky crystal, namely the Co coordination polymer.
The invention uses thiophene-2, 5-dicarboxylic acid as ligand to prepare the coordination polymer of cobalt with cobalt sulfate by a solvothermal method, the appearance of the coordination polymer is purple transparent flaky crystal, and the coordination polymer is tasteless and insoluble in organic solvent and water.
As shown in FIG. 1, the repeating unit is an asymmetric unit comprising three Co units2+Ions, three thiophene-2, 5-dicarboxylic acid ions and three DMF molecules. The prepared cobalt coordination polymer crystal is monochromated with a graphite monochromator on a Bruke smart APEXII CCO diffractometer to obtain Cu Kalpha
Rays, scanned in an omega-theta fashion. At 298K, diffraction points were collected. The modified structure analysis of F2 by full matrix least squares was done with the SHELXL 2014 software package. The chemical formula of the Co coordination polymer prepared by the invention is as follows: [ Co ] A3(tdc)3(DMF)3]DMF, the molecular formula of the polymer is: co3C30H34N4S3O16The relative molecular weight is 979.6029g/mol, the crystal is Monoclinic crystal system, and the space group is P21C, unit cell parameter is
α＝90°，β＝102.85(2)°,γ＝90°,
Z＝4。
The complex is an anionic column-layer skeleton and consists of a trinuclear unit and a binuclear unit, wherein the trinuclear unit has a chemical formula of [ Co [)3(COO)8]The chemical formula of the binuclear unit is [ Co ]2(COO)4]. As shown in FIG. 2A, the trinuclear unit is composed of 8 oxygen atoms on different thiophene-2, 5-dicarboxylic acid carboxyl groups and three Co2+The connection is formed. As shown in FIG. 2B, the binuclear unit is composed of oxygen atoms on 3 different thiophene-2, 5-dicarboxylic acid carboxyl groups and three oxygen atoms on three different DMF molecules with two Co2+The connection is formed.
Trinuclear unit containingThree Co2+Ions, named Co1 and two Co4, Co4 has an octahedral geometry, while Co1 has a tetrahedral geometry. Co1 and Co4 both adopt a hexacoordinate coordination mode, wherein Co1 coordinates with six carboxyl oxygen atoms from six different thiophene-2, 5-dicarboxylic acids, respectively; one Co4 coordinated to six carboxyl oxygen atoms from four different thiophene-2, 5-dicarboxylic acids, respectively, and the other Co4 coordinated to six carboxyl oxygen atoms from four different thiophene-2, 5-dicarboxylic acids, respectively; the dual core unit comprises two Co2+Ions, named as Co2 and two Co3, Co2 and Co3 all adopt a six-coordinate coordination mode, wherein Co2 coordinates with six carboxyl oxygen atoms from four different thiophene-2, 5-dicarboxylic acids respectively; co3 coordinated with three carboxyl oxygen atoms from three different thiophene-2, 5-dicarboxylic acids and three oxygen atoms from DMF molecules, respectively.
The thiophene-2, 5-dicarboxylic acid ligand adopts the following coordination mode: (η)1-η1)-(η2-η1)-μ4(see FIG. 3A), (η)2)-(η2)-μ2(see FIG. 3B) and (. eta.)1-η1)-(η1-η1)-μ4(see FIG. 3C). By (eta)1-η1)-(η2-η1)-μ4The ligand in coordination mode is tdc-A ligand and adopts (eta)2)-(η2)-μ2The ligand of the coordination mode is tdc-B ligand and adopts (eta)1-η1)-(η1-η1)-μ4The ligand of the coordination mode is a tdc-C ligand.
As shown in fig. 4, the trinuclear cells are connected by six ligands and the binuclear cells are connected by three tdc ligands in the ab plane to form a 2D layer with a (3,6) connected kgd network. As shown in FIG. 5, adjacent 2D layers are further connected at the trinuclear unit from both sides by a tdc-A ligand to form a 3D column-layer frame with a 1-dimensional channel along the a-axis and a pore size of about
And
referring to fig. 6, according to the comparison of diffraction data of the coordination polymer powder sample obtained in fig. 6 and powder obtained from single crystal, the diffraction peak of the obtained coordination polymer is consistent with the peak simulated by single crystal diffraction data, which shows that the purity of the obtained coordination polymer powder sample is relatively high, and the experimental reproducibility of the sample is also proved.
Referring to FIG. 7, the thermal stability of the iodine vapor trapping coordination polymer was obtained by thermogravimetric analysis of FIG. 7. The three-dimensional framework of the obtained coordination polymer single crystal sample can be stabilized to 400 ℃ through a thermogravimetric analysis curve. The prepared material has good thermal stability and is a new material with practical application value.
As shown in FIG. 8, CO2Adsorption studies confirm that the maximum adsorption capacity of the complex carbon dioxide is 18.86cc/g, which indicates that the compound has certain porosity and can be used as a carrier for absorbing iodine molecules. 500mg Co complex decoguest sample was placed at 298k I2In the vapor saturated chamber, the color of the crystals changed from purple to brown and finally black as shown in fig. 9.
To release iodine molecules from the network of Co complexes, black crystals of Co complexes undergo a macroscopic color change when they are soaked in dry ethanol. As shown in fig. 10, the color of the ethanol solution gradually increased from colorless to yellow, and the crystal color of the Co complex changed from brown to pale yellow.
To investigate I in Co coordination Polymer2Kinetics of Release, as shown in FIG. 11, the UV/Vis spectra were measured at room temperature by immersing 30mg of the crystals in 3mL of ethanol, I2The absorbance in ethanol increases with time and the release of iodine subsequently slows, because of I in ethanol2The release of iodine then slows down as the concentration of (c) increases over time.
As shown in FIG. 12, TGA measurements show complete adsorption I2The latter molecular formula is [ Co ]3(tdc)3]·0.5I。
As shown in fig. 13, the three curves in the graph represent the time-dependent change of the adsorption amount of iodine absorbed in three cycles, wherein the equation is a function of the time-dependent change of the adsorption amount of iodine absorbed in three cycles, y1 represents the first cycle, y2 represents the second cycle, and y3 represents the third cycle, and the adsorption amount of iodine becomes smaller with the increase of the cycle number, but still has a certain adsorption amount.
As shown in FIG. 14, the Co complexes had I in three repeated cycles (after soaking in ethanol in each re-experiment)2Adsorption capacity, demonstrating its high stability and good reusability. Thus, the Co complexes may be suitable for the efficient removal of aniline in waste systems as unique porous materials, easy to detect by color change, high adsorption capacity and good reproducibility.
The cobalt coordination polymer iodine vapor load material prepared by the invention has the characteristics of low price, easy obtaining, high absorption capacity, quick adsorption and the like, so the cobalt coordination polymer iodine vapor load material becomes I2The capture technology candidate has good application prospect in the fields of capture and storage of the radioactive element I and the like.
Claims (8)
1. A cobalt coordination polymer iodine vapor load material, wherein said cobalt coordination polymer iodine vapor load material has the chemical formula: [ Co ] A3 (tdc)3(DMF)3]·2DMF；
Wherein tdc is thiophene-2, 5-dicarboxylic acid, and DMF is N, N-dimethylformamide;
the iodine vapor load material of the cobalt coordination polymer is a Monoclinic crystal system, and the space group isP2 1 /cUnit cell parameter ofa =17.731 (19) Å；b= 9.744 (8) Å；c=21.049 (19) Å;α=90°,β=102.85 (2)°, γ=90°,V =3545 (6) Å3; Z = 4。
2. The cobalt coordination polymer iodine vapor load material of claim 1, wherein cobalt coordination polymer iodine vapor load material comprises a trinuclear unit and a binuclear unit;
the trinuclear unit consisting of oxygen atoms of eight different thiophene-2, 5-dicarboxylic acid carboxyl groupsWith three Co2+Connection formation;
the binuclear unit is composed of oxygen atoms on three different thiophene-2, 5-dicarboxylic acid carboxyl groups and oxygen atoms on three different DMF molecules and two Co2+The connection is formed.
3. The cobalt coordination polymer iodine vapor load material of claim 2, wherein the trinuclear unit comprises three Co2+Ions, named Co1 and two Co4, Co1 and Co4 all adopt a hexa-coordinated coordination mode, wherein Co1 coordinates with six carboxyl oxygen atoms from six different thiophene-2, 5-dicarboxylic acids, respectively; one Co4 coordinated to six carboxyl oxygen atoms from four different thiophene-2, 5-dicarboxylic acids, respectively, and the other Co4 coordinated to six carboxyl oxygen atoms from four different thiophene-2, 5-dicarboxylic acids, respectively;
the dual core unit comprises two Co2+Ions, named as Co2 and Co3, Co2 and Co3 all adopt a six-coordinate coordination mode, wherein Co2 is respectively coordinated with six carboxyl oxygen atoms from four different thiophene-2, 5-dicarboxylic acids; co3 coordinated with three carboxyl oxygen atoms from three different thiophene-2, 5-dicarboxylic acids and three oxygen atoms from DMF molecules, respectively.
4. The cobalt coordination polymer iodine vapor load material according to any one of claim 2, wherein thiophene-2, 5-dicarboxylic acid ligand adopts the following coordination mode: (η)1-η1）-（η2-η1）-μ4、（η2）-（η2）-μ2And (η)1- η1）-（η1-η1）-μ4。
5. A method of making a cobalt coordination polymer iodine vapor load material according to any of claims 1 to 4 comprising the steps of:
1) according to Co2+The molar ratio of the soluble salt, the thiophene-2, 5-dicarboxylic acid and the N, N-dimethylformamide is 10:10:1, weighing Co2+A solution of soluble salts of thiophene-2, 5-dicarboxylic acid and N, N-dimethylformamide;
2) mixing Co2+Dissolving the soluble salt in N, N-dimethylformamide solution, adding thiophene-2, 5-dicarboxylic acid, and transferring the solution into a reaction kettle;
3) and sealing the reaction kettle, keeping the temperature constant at 373K for 48h, slowly cooling to room temperature, filtering and washing to obtain purple transparent flaky crystals, namely the cobalt coordination polymer iodine vapor load material.
6. The method of claim 5, wherein Co coordinates polymer iodine vapor load material preparation method, characterized in that, Co coordination polymer iodine vapor load material2+The soluble salt of (A) is cobalt chloride, cobalt sulfate or cobalt nitrate.
7. The method of claim 5, wherein the washing is with fresh DMF solvent.
8. Use of a cobalt coordination polymer iodine vapor supporting material according to any one of claims 1 to 4 as an iodine scavenger, iodine releasing agent or iodine storage agent.
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