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CN107474060B - It is a kind of with the metal-organic framework materials and its preparation method and application for being selectively adsorbing and separating anionic dye performance - Google Patents

It is a kind of with the metal-organic framework materials and its preparation method and application for being selectively adsorbing and separating anionic dye performance Download PDF

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CN107474060B
CN107474060B CN201710683594.4A CN201710683594A CN107474060B CN 107474060 B CN107474060 B CN 107474060B CN 201710683594 A CN201710683594 A CN 201710683594A CN 107474060 B CN107474060 B CN 107474060B
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metal
organic framework
framework materials
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benzotriazole
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CN107474060A (en
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胡同亮
何伟伟
李娜
李龙升
王熙
卜显和
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Tianjin Nankai University 21st Century Industrial Research Institute Co.,Ltd.
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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07FACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F3/00Compounds containing elements of Groups 2 or 12 of the Periodic Table
    • C07F3/003Compounds containing elements of Groups 2 or 12 of the Periodic Table without C-Metal linkages
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/22Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
    • B01J20/223Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material containing metals, e.g. organo-metallic compounds, coordination complexes
    • B01J20/226Coordination polymers, e.g. metal-organic frameworks [MOF], zeolitic imidazolate frameworks [ZIF]
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2220/00Aspects relating to sorbent materials
    • B01J2220/40Aspects relating to the composition of sorbent or filter aid materials
    • B01J2220/48Sorbents characterised by the starting material used for their preparation
    • B01J2220/4812Sorbents characterised by the starting material used for their preparation the starting material being of organic character
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07BGENERAL METHODS OF ORGANIC CHEMISTRY; APPARATUS THEREFOR
    • C07B2200/00Indexing scheme relating to specific properties of organic compounds
    • C07B2200/13Crystalline forms, e.g. polymorphs

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  • Organic Chemistry (AREA)
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Abstract

The invention discloses a kind of with the metal-organic framework materials and its preparation method and application for being selectively adsorbing and separating anionic dye performance.Its composition is represented by the chemical formula are as follows: C60H39ClN14O10Zn4, with positively charged, (1,3- bis- (4- carboxyl phenyl) imidazoles villaumite is main ligand, 1-H benzotriazole is assistant ligand, and solvent is n,N-Dimethylformamide, benzotriazole and metal zinc ion form four core Zn clusters, then connect into hexagonal cavernous structure by diacid.The material has good chemical stability and thermal stability, has the function of selective absorption to anionic dye, and show good separating effect.Provided by the invention preparation method is simple, short preparation period and easily recycling.Ideal adsorption agent is provided for processing dye discoloration.

Description

It is a kind of with the metal-organic framework for being selectively adsorbing and separating anionic dye performance Material and its preparation method and application
Technical field
The present invention relates to metal-organic framework materials synthesis technical fields, and in particular to an example is based on positive charge (1,3- Two (4- carboxyl phenyl) imidazoles villaumites are that cationic metal-organic framework materials of main ligand are used for anion as adsorbent The quick adsorption of dyestuff with separate.
Background technique
Metal-organic framework (Metal-Organic Framework, MOFs), also known as Porous coordination polymer (Porous CoordinationPolymers, PCPs) is to pass through coordination key-shaped by metal ion or metal cluster and organic ligand At one kind there is the crystalline state porous framework material of periodic network structure, because of its high-specific surface area, the spies such as porous, structure is adjustable Property, there is potential application prospect in terms of the adsorbing separation of gas, catalysis, sensing and proton.Referring to: Nandasiri,M.I.;Jambovane,S.R.;McGrail,B.P.; Schaef,H.T.;Nune, S.K.Coord.Chem.Rev.2016,311,38-52;H.Furukawa,N.Ko, Y.B.Go,N.Aratani,S.B.Choi, E.Choi,A.Yazaydin,R.Q.Snurr,M.O'Keeffe, J.Kim,O.M.Yaghi,Science 2010,329, 424. are used as a polyporous materials, and MOFs has become research main-guest chemistry due to the Scalability in its duct and cage Focus.In recent years, it is based on ion exchange and Subjective and Objective electrostatic interaction, constructs the MOFs of ionic for different charges The report of Dye Adsorption separation is more and more, but in the ionic MOFs of these reports, the sun based on organic ligand building The metal-organic framework materials of ionic are more rare.Referring to: Han, Y.;Sheng,S.;Yang,F.;Xie,Y. B.;Zhao, M.J.;Li,J.R.Journal ofMaterials ChemistryA.2015,3,12804;Song,B. Q.;Wang,X.L.; Zhang,Y.T.;Wu,X.S.;Liu,H.S.;Shao,K.Z.;Su,Z.M.;Chem. Commun.,2015,51,9515.
Summary of the invention
The performance of aspect is separated to Dye Adsorption it is an object of the invention to explore ionic type metal-organic framework materials, A kind of metal-organic framework materials are provided, while also providing a kind of preparation method of metal-organic framework materials.The frame Frame material is the metal-organic framework of the poroid cationic of an example supermolecule, has biggish 1-dimention nano hole in a axis direction Road, structure have relatively high chemical stability and thermal stability, have the function of selective absorption to anionic dye, And show good separating effect, it has broad application prospects in materials science field.
Technical solution of the present invention:
It is a kind of with the metal-organic framework materials for being selectively adsorbing and separating anionic dye performance, chemical formula is C60H39ClN14O10Zn4, with it is positively charged (1,3- bis- (4- carboxyl phenyl) imidazoles villaumite for main ligand, 1-H benzotriazole For assistant ligand, solvent is n,N-Dimethylformamide, and benzotriazole and metal zinc ion form four core Zn clusters, then pass through two Acid connects into hexagonal cavernous structure, passes through strong hydrogen bonding (C-HCl) between adjacent 2D layer and is linked to be three-dimensional oversubscription Subframe, porosity 52.8%;The metal-organic framework materials crystal belongs to monoclinic system, P21/ m space group, structure cell ginseng Number is respectively as follows: α=γ= 90 °, β=102.18 °;The decomposition temperature for being coordinated frame is 320 DEG C.
The preparation method of the metal-organic framework materials, comprising the following steps:
1) by organic ligand (1,3- bis- (4- carboxyl phenyl) imidazoles villaumite and benzotriazole and zinc nitrate hexahydrate It is placed in 3mL n,N-Dimethylformamide solvent, this mixed solution is put into 10ml vial, ultrasonic 30min, mixing Uniformly;
2) sealing of above-mentioned vial is placed in 85 DEG C of baking oven, carries out incubating solvent thermal response, reacted 72 hours Afterwards, yellow bulk crystals can be obtained;
3) up to the metal-organic framework after above-mentioned yellow crystals being washed with N,N-dimethylformamide respectively, being dry Material.
It is further, described that (1,3- bis- (4- carboxyl phenyl) imidazoles villaumite, benzotriazole and zinc nitrate hexahydrate rub You are than being 1:1:2.
Further, (amount ratio of 1,3- bis- (4- carboxyl phenyl) imidazoles villaumite and solvent is 0.05 mM: 3 milli It rises.
A kind of application of the cationic metal-organic framework materials, can be used as adsorbent, for anionic dye Quick adsorption with separate, method be by the crystalline material by ethyl alcohol carry out exchange of solvent, be then separately immersed in six kinds of differences It is real using liquid ultraviolet detection means in the ethanol solution of dye molecule (anionic dye, the dye of positive ion and neutral dye) Test the result shows that: cationic MOF only has quick absorption property to anionic dye, and simultaneously to cation and neutral dye Not similar absorption behavior.
The invention has the advantages that cationic metal-the organic frame is nontoxic and stable adsorbent material, for yin Ionic dye has efficient absorption separating capacity.Provided by the invention preparation method is simple, short preparation period and easily recycling. Ideal adsorption agent is provided for processing dye discoloration.
Detailed description of the invention
Fig. 1 is the poroid figure of metal-organic framework two dimension and three-dimensional perspective structure chart.
Fig. 2 is the powder diagram of the metal-organic framework.
Fig. 3 is absorption figure of the metal-organic framework to different dyes.
Fig. 4 is separation figure of the metal-organic framework to mixed dye.
Fig. 5 is that the dyestuff of the metal-organic framework discharges figure.
Specific embodiment
Example:
A kind of preparation method of the metal-organic framework materials, comprising the following steps:
1) (1,3- bis- (4- carboxyl phenyl) imidazoles villaumite (17.4mg), benzotriazole (5.9mg), zinc nitrate hexahydrate (30mg) is added in the vial of 10ml, adds 3mLN, dinethylformamide solution.
2) sealing of above-mentioned vial is placed in 85 DEG C of baking oven, carries out incubating solvent thermal response, reacted 72 hours Afterwards, strip light yellow crystal is obtained, yield is about 70%.
It 3) will be organic up to the metal-after above-mentioned light yellow crystal N,N-dimethylformamide and ethanol washing, drying Frame material.
Gained metal-organic framework materials chemical formula is C60H39ClN14O10Zn4, with positive charge (1,3- bis- (4- carboxyl benzene Base) imidazoles villaumite be main ligand, 1H- benzotriazole be assistant ligand, using solvent-thermal method, solvent N, N- dimethyl formyl Amine aqueous solution synthesizes the metal-organic framework (NUM-4) of the poroid cationic of an example supermolecule.In NUM-4, zinc ion receives Three nitrogen-atoms in benzotriazole form four core zinc clusters, pass through the carboxyl at diacid ligand both ends between four different core zinc clusters Group, which is connected, becomes hexagonal cavernous structure.As shown in Fig. 1, which has biggish nano-pore in a axis direction Road, hole size are about It is linked to be 3D by strong hydrogen bonding (C-HCl) between adjacent 2D layer to surpass Molecular framework, porosity 52.8%.;Illustrate that obtained sample purity is very high in attached drawing 2, the decomposition temperature for being coordinated frame is 320 ℃。
To the characterization of metal-organic framework materials obtained:
Crystal structure determination
The monocrystalline for choosing suitable size under the microscope, with the Mo-K through graphite monochromator monochromatization on single crystal diffractometer Alpha ray, temperature 113K collect diffraction data in a manner of ω-φ.All diffraction datas carry out absorption school using SADABS program Just.Cell parameter is determined with least square method.Data convert and structure elucidation use SAINT and SHELXTL program to complete respectively. Whole non-hydrogen atom coordinates first are determined with difference function method and least square method, and obtain the hydrogen of main body frame with theoretical hydrogenation method Then atom site carries out refine to crystal structure with least square method.Crystallography point diffraction data collection and structure refinement Partial parameters see the table below 1.
Table 1: the crystal parameter table of the metal-organic framework
R1=Σ | | Fo|-|Fc||/Σ|Fo|;wR2=[Σ [w (Fo 2-Fc 2)2]/Σw(Fo 2)2]1/2.
Dye Adsorption, separation and release:
1) it is the frame material for exchanging 20mg ethyl alcohol first, is separately immersed in the different dyes molecule of 10ml 20ppm Ethanol solution in.The ultraviolet test specification of liquid: the frame material, can be by 95% or more anionic dye within 720min Absorption is complete, and to the dye of positive ion and neutral dye almost without absorption, (increase at any time, methyl as shown in Fig. 3 Orange, acid orange, methyl blue and Congo red absorbance are gradually reduced;The absorbance of methylene blue and Nile red remains unchanged).
2) secondly, the frame material that 20mg ethyl alcohol is exchanged, is separately immersed in isometric methyl orange/methylene blue, In methyl orange/Nile red 10ml mixed solution.The ultraviolet test specification of liquid: frame material energy quick adsorption anion dye Material stays cation and neutral dye in the solution, and (absorbance of increase at any time, methyl orange gradually drops as shown in Fig. 4 Low, the absorbance of methylene blue and Nile red is almost unchanged).
3) finally, the frame material for having adsorbed methyl orange and acid orange is immersed in 10ml saturation NH4The ethyl alcohol of Cl is molten In liquid, over time, dyestuff can be released from frame quickly, and release rate is up to 99%, as shown in Fig. 5.
The Dye Adsorption experiment tested by TU-1950 ultraviolet-visible spectrometer, acquired results in the accompanying drawings, Use Origin Software on Drawing.

Claims (5)

1. a kind of with the metal-organic framework materials for being selectively adsorbing and separating anionic dye performance, it is characterised in that: chemistry Formula is C60H39ClN14O10Zn4, with it is positively charged (1,3- bis- (4- carboxyl phenyl) imidazoles villaumite for main ligand, 1-H benzo three Nitrogen azoles is assistant ligand, and solvent is n,N-Dimethylformamide, and benzotriazole and metal zinc ion form four core Zn clusters, then lead to It crosses diacid and connects into hexagonal cavernous structure, Magnetic Properties of Three-Dimensional Supramolecular Complex frame, hole are linked to be by strong hydrogen bonding between adjacent 2D layer Gap rate is 52.8%;The metal-organic framework materials crystal belongs to monoclinic system, P21/mSpace group, cell parameter are respectively as follows: a = 13.0559(2) Å, b = 37.1987(6) Å, c = 21.4712(2) Å, α=γ= 90o, β= 102.18o;Coordination The decomposition temperature of frame is 320oC。
2. a kind of preparation method of metal-organic framework materials as described in claim 1, it is characterised in that the following steps are included:
1) by organic ligand, (1,3- bis- (4- carboxyl phenyl) imidazoles villaumite and benzotriazole and zinc nitrate hexahydrate are placed in In 3ml n,N-Dimethylformamide solvent, this mixed solution is put into 10ml vial, ultrasonic 30min, is uniformly mixed;
2) sealing of above-mentioned vial is placed in 85 °C of baking ovens, incubating solvent thermal response is carried out, after reaction 72 hours Obtain faint yellow strip crystal;
3) up to the metal-organic framework materials after above-mentioned yellow bulk crystals being washed with N,N-dimethylformamide, being dry.
3. the preparation method of metal-organic framework materials according to claim 2, it is characterised in that: (1, the 3- bis- (4- Carboxyl phenyl) imidazoles villaumite, benzotriazole and zinc nitrate hexahydrate molar ratio be 1:1:2.
4. the preparation method of metal-organic framework materials according to claim 2, it is characterised in that: (1, the 3- bis- (4- Carboxyl phenyl) imidazoles villaumite and solvent N,N-dimethylformamide amount ratio be 0.05 mM: 3.0 milliliter.
5. a kind of application of metal-organic framework materials as described in claim 1, it is characterised in that: the material is used for yin The application of ionic dye selective absorption.
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CN108084454A (en) * 2018-01-12 2018-05-29 陕西理工大学 A kind of sodium(I)Coordination polymer and preparation method and application
CN108384027B (en) * 2018-05-07 2021-03-26 江西省科学院应用化学研究所 Zinc-organic framework with acetylacetone fluorescent response and preparation method thereof
CN108993424B (en) * 2018-07-18 2021-02-05 天津科技大学 Preparation and regeneration method of porous lignin adsorbent
CN109351334A (en) * 2018-09-12 2019-02-19 内蒙古大学 A kind of methylene blue adsorption number material and its preparation method and application that water is stable
CN114450327B (en) * 2019-08-29 2024-04-05 乔治亚技术研究公司 Metal organic framework material and application thereof

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