CN110144050A - One kind having MnO4-Rare-earth europium coordination polymer of detection function and preparation method thereof - Google Patents
One kind having MnO4-Rare-earth europium coordination polymer of detection function and preparation method thereof Download PDFInfo
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- CN110144050A CN110144050A CN201910579488.0A CN201910579488A CN110144050A CN 110144050 A CN110144050 A CN 110144050A CN 201910579488 A CN201910579488 A CN 201910579488A CN 110144050 A CN110144050 A CN 110144050A
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- 239000013256 coordination polymer Substances 0.000 title claims abstract description 68
- 229920001795 coordination polymer Polymers 0.000 title claims abstract description 68
- 238000001514 detection method Methods 0.000 title claims abstract description 28
- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 21
- 229910052693 Europium Inorganic materials 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- OGPBJKLSAFTDLK-UHFFFAOYSA-N europium atom Chemical compound [Eu] OGPBJKLSAFTDLK-UHFFFAOYSA-N 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 57
- 239000003446 ligand Substances 0.000 claims abstract description 18
- LTRYUAZFLOGRLJ-UHFFFAOYSA-N 4-cyano-3-methylbenzoic acid Chemical compound CC1=CC(C(O)=O)=CC=C1C#N LTRYUAZFLOGRLJ-UHFFFAOYSA-N 0.000 claims abstract description 10
- 150000001450 anions Chemical class 0.000 claims abstract description 8
- 125000004430 oxygen atom Chemical group O* 0.000 claims abstract description 7
- 125000002843 carboxylic acid group Chemical group 0.000 claims abstract description 4
- 239000000126 substance Substances 0.000 claims abstract description 4
- 238000006243 chemical reaction Methods 0.000 claims description 16
- 239000013078 crystal Substances 0.000 claims description 7
- 150000002910 rare earth metals Chemical class 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- -1 rare-earth europium ion Chemical class 0.000 claims description 6
- 230000035945 sensitivity Effects 0.000 abstract description 4
- 230000005284 excitation Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 6
- 239000007864 aqueous solution Substances 0.000 description 4
- 239000012286 potassium permanganate Substances 0.000 description 4
- 230000000171 quenching effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004020 luminiscence type Methods 0.000 description 3
- 239000012299 nitrogen atmosphere Substances 0.000 description 3
- 238000010791 quenching Methods 0.000 description 3
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 239000013110 organic ligand Substances 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 239000001103 potassium chloride Substances 0.000 description 2
- 235000011164 potassium chloride Nutrition 0.000 description 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 2
- 238000000634 powder X-ray diffraction Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- WAEMQWOKJMHJLA-UHFFFAOYSA-N Manganese(2+) Chemical compound [Mn+2] WAEMQWOKJMHJLA-UHFFFAOYSA-N 0.000 description 1
- 206010057190 Respiratory tract infections Diseases 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000012718 coordination polymerization Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000002795 fluorescence method Methods 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910001437 manganese ion Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- SCVFZCLFOSHCOH-UHFFFAOYSA-M potassium acetate Chemical compound [K+].CC([O-])=O SCVFZCLFOSHCOH-UHFFFAOYSA-M 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 229910001487 potassium perchlorate Inorganic materials 0.000 description 1
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 description 1
- 229910052939 potassium sulfate Inorganic materials 0.000 description 1
- 238000006862 quantum yield reaction Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000002411 thermogravimetry Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- LWIHDJKSTIGBAC-UHFFFAOYSA-K tripotassium phosphate Chemical compound [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 description 1
- 229910000404 tripotassium phosphate Inorganic materials 0.000 description 1
- 208000016261 weight loss Diseases 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G83/00—Macromolecular compounds not provided for in groups C08G2/00 - C08G81/00
- C08G83/008—Supramolecular polymers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/6428—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes"
- G01N21/643—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes" non-biological material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/6428—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes"
- G01N2021/6432—Quenching
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Abstract
The invention discloses one kind to have MnO4 ‑Rare-earth europium coordination polymer of detection function and preparation method thereof, wherein the chemical formula of the coordination polymer is [Eu (L)3(H2O)2]n, L is ligand in formula, and the specifically negative univalent anion of 3- methyl -4- cyanobenzoic acid, coordination polymer belongs to monoclinic system, P21/ c space group includes an independent Eu in one asymmetric cell3+, three L ligands and two coordinations H2O, each Eu3+Center and nine oxygen atom ligands, this nine oxygen atoms are respectively from seven carboxylic acid groups in six L ligands and the H of two coordinations2O, adjacent Eu3+By L ligand bridging, chain coordination polymer is formed, excitation wavelength 394nm, launch wavelength 577nm, 591nm, 617nm, 652nm and 697nm show visually observed bright feux rouges.The invention has the beneficial effects that: coordination polymer provided by the invention has MnO4 ‑Detection function, and selective good, high sensitivity, detection limit are low, can it is easy, quickly and accurately detect MnO in water phase4 ‑。
Description
Technical field
The present invention relates to a kind of coordination polymers and preparation method thereof, and in particular to one kind has MnO4 -Detection function it is dilute
Native europium coordination polymer and preparation method thereof, belongs to technical field of chemistry.
Background technique
Potassium permanganate (KMnO4), as oxidant important in laboratory and industrial production, it is widely used in As (III) etc.
The removal of harmful organic substance in pollutant and sewage.When extensive abuse and any discharge KMnO4When, it will contain in ambient water
Excessive high manganese ion (MnO4 -), this can not only cause respiratory tract infection and skin irritatin, and also result in environment dirt
Dye, causes serious security risk.
Therefore, in analysis technical field and environmental science, searching is quick, sensitively detects MnO4 -Method, to changing
Kind human health and protection environment have a very important significance.
In existing detection MnO4 -Method in, detection speed fast, high sensitivity, detection limit be low, behaviour because having for fluorescence method
Make simplicity, be easy to the advantages that observing, extensively and profoundly is studied, in the detection of metal cation, anion and organic molecule
Identification aspect has important application value.
The coordination polymer assembled by rare earth ion and organic ligand, the orderly, hole surface with tactical rule
The features such as controllable, luminescent color becomes clear, luminescent lifetime is long.Therefore, it is that one kind has uniqueness in terms of the detection identification that shines
The material of advantage and important application prospect, while also resulting in the strong concern of researcher.
Currently, researcher is reacted using various organic ligands with some rare earth ions, it is prepared for largely having
The coordination polymer of the characteristics of luminescence, although some of them coordination polymer is shown to chromate ion (CrO4 2-), weight chromium
Acid ion (Cr2O7 2-), fluorine ion (F-) etc. anion luminous detection performance, however, being able to detect MnO4 -Coordination polymerization
Object is few.
Summary of the invention
To solve the deficiencies in the prior art, the purpose of the present invention is to provide one kind to have MnO4 -The rare-earth europium of detection function
Coordination polymer and preparation method thereof.
In order to achieve the above objectives, the present invention adopts the following technical scheme that:
One kind having MnO4 -The rare-earth europium coordination polymer of detection function, which is characterized in that the chemistry of the coordination polymer
Formula is [Eu (L)3(H2O)2]n, L is ligand, the specifically negative univalent anion of 3- methyl -4- cyanobenzoic acid, structural formula in formula
It is as follows:
The coordination polymer [Eu (L)3(H2O)2]nBelong to monoclinic system, P21/ c space group is wrapped in one asymmetric cell
Hydrone containing an independent rare-earth europium ion, three L ligands and two coordinations, each rare-earth europium ion center and nine oxygen
Atomic coordinate, this nine oxygen atoms are respectively from seven carboxylic acid groups in six L ligands and the hydrone of two coordinations, phase
Adjacent rare-earth europium ion forms chain coordination polymer by L ligand bridging；
The coordination polymer [Eu (L)3(H2O)2]nExcitation wavelength be 394nm, launch wavelength 577nm, 591nm,
617nm, 652nm and 697nm show visually observed bright feux rouges.
It is above-mentioned that there is MnO4 -The preparation method of the rare-earth europium coordination polymer of detection function, which is characterized in that including with
Lower step:
Step1: six nitric hydrate europiums, 3- methyl -4- cyanobenzoic acid and water are mixed with the molar ratio of 1:1:400~500
It closes, stirs evenly, obtain mixed liquor；
Step2: mixed liquor is sealed in reaction kettle, is heated to 140~160 DEG C, keeps 60~96h；
Step3: reaction kettle is slowly cooled to room temperature, and obtains colourless bulk crystals.
Preparation method above-mentioned, which is characterized in that in Step3, the cooling rate of reaction kettle is controlled in 5~8 DEG C/h.
The invention has the beneficial effects that:
(1) coordination polymer [Eu (L) provided by the invention3(H2O)2]n, there is MnO4 -Detection function, and it is selective
Good, high sensitivity, detection are limited down to 8.44 × 10-4Mol/L, can it is easy, quickly and accurately detect MnO in water phase4 -；
(2) coordination polymer [Eu (L) provided by the invention3(H2O)2]n, thermal stable temperature is high, has reached 380 DEG C, this is
Its subsequent applications provides necessary condition；
(3) coordination polymer [Eu (L) provided by the invention3(H2O)2]n, capable of emitting macroscopic red light, and face
Color is bright, is easy to observe；
(4) coordination polymer [Eu (L) provided by the invention3(H2O)2]nPreparation method, simple process, reaction condition temperature
With raw material is cheap and easily-available；
(5) coordination polymer [Eu (L) provided by the invention3(H2O)2]nPreparation method, used solvent be water, keep away
Exempt from the use of toxic organic solvents, it is more environmentally-friendly；
(6) coordination polymer [Eu (L) provided by the invention3(H2O)2]nPreparation method, the yield of products therefrom is high, reaches
To 60% or more.
Detailed description of the invention
Fig. 1 is coordination polymer [Eu (L)3(H2O)2]nCoordination environment schematic diagram；
Fig. 2 is coordination polymer [Eu (L)3(H2O)2]nOne-dimensional chain structural schematic diagram；
Fig. 3 is coordination polymer [Eu (L)3(H2O)2]nX-ray powder diffraction figure；
Fig. 4 is coordination polymer [Eu (L)3(H2O)2]nWeight-loss curve figure under nitrogen atmosphere；
Fig. 5 is coordination polymer [Eu (L)3(H2O)2]nFluorescence emission spectrogram of compound；
Fig. 6 is coordination polymer [Eu (L)3(H2O)2]nLuminous intensity comparison in different anions sylvite aqueous solution
Figure；
Fig. 7 is coordination polymer [Eu (L)3(H2O)2]nTo various concentration MnO4 -The luminescence response figure of solution；
Fig. 8 is coordination polymer [Eu (L)3(H2O)2]nLuminous intensity and MnO4 -The matched curve figure of concentration.
Specific embodiment
Specific introduce is made to the present invention below in conjunction with the drawings and specific embodiments.
First part: there is MnO4 -The structure of the rare-earth europium coordination polymer of detection function
It is provided by the invention that there is MnO4 -The rare-earth europium coordination polymer of detection function, chemical formula are [Eu (L)3
(H2O)2]n, L is ligand in formula, and the specifically negative univalent anion of 3- methyl -4- cyanobenzoic acid, structural formula is as follows:
To the coordination polymer [Eu (L)3(H2O)2]nCrystal carry out structural characterization and parsing, determine its structure cell and space
Structure is as follows:
The coordination polymer [Eu (L)3(H2O)2]nBelong to monoclinic system, P21/ c space group is wrapped in one asymmetric cell
Hydrone containing an independent rare-earth europium ion, three L ligands and two coordinations, as shown in Figure 1, in each rare-earth europium ion
The heart and nine oxygen atom ligands, this nine oxygen atoms are respectively from seven carboxylic acid groups and two coordinations in six L ligands
Hydrone, adjacent rare-earth europium ion forms chain coordination polymer by L ligand bridging, and structure is as shown in Figure 2.
To the coordination polymer [Eu (L)3(H2O)2]nCarry out X-ray powder diffraction test, diffraction patterns as shown in figure 3,
Should the result shows that: coordination polymer [Eu (L)3(H2O)2]nWith good purity.
To the coordination polymer [Eu (L)3(H2O)2]nCarry out thermogravimetric analysis, such as Fig. 4 of weight-loss curve under nitrogen atmosphere
Shown, which shows: coordination polymer [Eu (L)3(H2O)2]nIt can be stabilized to 380 DEG C under nitrogen atmosphere, heat is steady
It is qualitative excellent.
To the coordination polymer [Eu (L)3(H2O)2]nSpectrofluorimetry is carried out, when excitation wavelength is 394nm, coordination
Polymer [Eu (L)3(H2O)2]nWith the excellent characteristics of luminescence, have at 577nm, 591nm, 617nm, 652nm and 697nm
Eu3+Characteristic emission peak, as shown in figure 5, and showing visually observed bright feux rouges.
Through detecting, the coordination polymer [Eu (L)3(H2O)2]nLuminescent lifetime be 412.9ms, quantum yield is
3.06%.
Based on the coordination polymer [Eu (L)3(H2O)2]nWith excellent luminescent properties, we have studied excitation wavelengths to be
When 394nm, coordination polymer [Eu (L)3(H2O)2]nIn different anions sylvite (K2S2O3、KBr、CH3COOK、K3PO4、K2S、
K2CO3、KNO3、K2SO4、KClO4、KMnO4) luminous intensity in aqueous solution, as shown in Figure 6.The comparison diagram shows: MnO4 -To molten
Shining for liquid has most apparent quenching effect, coordination polymer [Eu (L)3(H2O)2]nTo MnO4 -It is sent out with excellent selectivity
Light detection performance.
In addition, we utilize the coordination polymer [Eu (L)3(H2O)2]nTo the MnO in water phase4 -Luminous detection carried out into
One step is in depth probed into.
To coordination polymer [Eu (L)3(H2O)2]nAqueous solution in different amounts of KMnO is added4Aqueous solution, test transmitting light
Spectrum, test results are shown in figure 7.As shown in Figure 7, with MnO4 -The continuous rising of concentration, fluorescence intensity gradually weaken, when
MnO4 -Concentration is 2.857 × 10-3When mol/L, the coordination polymer [Eu (L)3(H2O)2]nFluorescence intensity reached complete sudden
It goes out.
Processing is fitted to luminous intensity data, obtains the coordination polymer [Eu (L)3(H2O)2]nTo MnO4 -Detection
Quantitative relation formula and quenching constant, wherein detection quantitative relation formula is I0/ I=1+2.665 × 103[MnO4 -], quenching constant is
2665L/mol, as shown in Figure 8.
8.44 × 10 are limited to according to the detection that quenching constant is calculated-4mol/L。
It can be seen that coordination polymer [Eu (L)3(H2O)2]nWith MnO4 -Detection function, and selective good, sensitivity
Height, detection are limited down to 8.44 × 10-4Mol/L, can it is easy, quickly and accurately detect MnO in water phase4 -Concentration.
Second part: coordination polymer [Eu (L)3(H2O)2]nPreparation method
Coordination polymer [Eu (L) provided by the invention3(H2O)2]nPreparation method, simple process, reaction condition is mild,
Raw material is cheap and easily-available, and used solvent be water, do not pollute the environment, the preparation method specifically includes the following steps:
Step1: six nitric hydrate europiums, 3- methyl -4- cyanobenzoic acid and water are mixed with the molar ratio of 1:1:400~500
It closes, stirs evenly, obtain mixed liquor；
Step2: mixed liquor is sealed in reaction kettle, is heated to 140~160 DEG C, keeps 60~96h；
Step3: reaction kettle is cooled to by room temperature with the cooling rate of 5~8 DEG C/h, obtains colourless bulk crystals.
Embodiment 1
Step1: six nitric hydrate europiums, 3- methyl -4- cyanobenzoic acid and water are mixed with the molar ratio of 1:1:400, stirred
It mixes uniformly, obtains mixed liquor；
Step2: mixed liquor is sealed in reaction kettle, is heated to 140 DEG C, keeps 96h；
Step3: reaction kettle is cooled to by room temperature with the cooling rate of 5 DEG C/h, obtains colourless bulk crystals.
Through detecting, which is coordination polymer [Eu (L)3(H2O)2]n。
It is computed, the coordination polymer [Eu (L)3(H2O)2]nYield be 63%.
Embodiment 2
Step1: six nitric hydrate europiums, 3- methyl -4- cyanobenzoic acid and water are mixed with the molar ratio of 1:1:450, stirred
It mixes uniformly, obtains mixed liquor；
Step2: mixed liquor is sealed in reaction kettle, is heated to 150 DEG C, keeps 80h；
Step3: reaction kettle is cooled to by room temperature with the cooling rate of 5 DEG C/h, obtains colourless bulk crystals.
Through detecting, which is coordination polymer [Eu (L)3(H2O)2]n。
It is computed, the coordination polymer [Eu (L)3(H2O)2]nYield be 65%.
Embodiment 3
Step1: six nitric hydrate europiums, 3- methyl -4- cyanobenzoic acid and water are mixed with the molar ratio of 1:1:500, stirred
It mixes uniformly, obtains mixed liquor；
Step2: mixed liquor is sealed in reaction kettle, is heated to 160 DEG C, keeps 96h；
Step3: reaction kettle is cooled to by room temperature with the cooling rate of 8 DEG C/h, obtains colourless bulk crystals.
Through detecting, which is coordination polymer [Eu (L)3(H2O)2]n。
It is computed, the coordination polymer [Eu (L)3(H2O)2]nYield be 68%.
It can be seen that coordination polymer [Eu (L) provided by the invention3(H2O)2]nPreparation method, the production of products therefrom
Rate is higher, has reached 60% or more, this method is a kind of truly feasible preparation method.
It should be noted that the above embodiments do not limit the invention in any form, it is all to use equivalent replacement or equivalent change
The mode changed technical solution obtained, falls within the scope of protection of the present invention.
Claims (3)
1. one kind has MnO4 -The rare-earth europium coordination polymer of detection function, which is characterized in that the chemical formula of the coordination polymer
For [Eu (L)3(H2O)2]n, L is ligand, the specifically negative univalent anion of 3- methyl -4- cyanobenzoic acid in formula, and structural formula is such as
Under:
The coordination polymer [Eu (L)3(H2O)2]nBelong to monoclinic system, P21/ c space group includes one in one asymmetric cell
The hydrone of a independent rare-earth europium ion, three L ligands and two coordinations, each rare-earth europium ion center and nine oxygen atoms
Coordination, this nine oxygen atoms are respectively from seven carboxylic acid groups in six L ligands and the hydrone of two coordinations, adjacent
Rare-earth europium ion forms chain coordination polymer by L ligand bridging；
The coordination polymer [Eu (L)3(H2O)2]nExcitation wavelength be 394nm, launch wavelength 577nm, 591nm, 617nm,
652nm and 697nm shows visually observed bright feux rouges.
2. described in claim 1 have MnO4 -The preparation method of the rare-earth europium coordination polymer of detection function, which is characterized in that
The following steps are included:
Step1: six nitric hydrate europiums, 3- methyl -4- cyanobenzoic acid and water are mixed with the molar ratio of 1:1:400~500, stirred
It mixes uniformly, obtains mixed liquor；
Step2: mixed liquor is sealed in reaction kettle, is heated to 140~160 DEG C, keeps 60~96h；
Step3: reaction kettle is slowly cooled to room temperature, and obtains colourless bulk crystals.
3. preparation method according to claim 2, which is characterized in that in Step3, the cooling rate of reaction kettle is controlled
In 5~8 DEG C/h.
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| CN111925531A (en) * | 2020-07-17 | 2020-11-13 | 衢州学院 | Preparation method and application of Cd-MOF fluorescent probe material |
| CN114933708A (en) * | 2022-05-11 | 2022-08-23 | 武汉工程大学 | Tb-MOF fluorescent probe material, method for detecting permanganate acid radicals in water and application |
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| CN111925531B (en) * | 2020-07-17 | 2021-11-16 | 衢州学院 | Preparation method and application of Cd-MOF fluorescent probe material |
| CN114933708A (en) * | 2022-05-11 | 2022-08-23 | 武汉工程大学 | Tb-MOF fluorescent probe material, method for detecting permanganate acid radicals in water and application |
| CN114933708B (en) * | 2022-05-11 | 2023-12-26 | 武汉工程大学 | Tb-MOF fluorescent probe material, method for detecting permanganate in water and application |
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