CN106588951B - A kind of porous metal-organic framework compound and its preparation method and application based on zinc - Google Patents

A kind of porous metal-organic framework compound and its preparation method and application based on zinc Download PDF

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CN106588951B
CN106588951B CN201710057891.8A CN201710057891A CN106588951B CN 106588951 B CN106588951 B CN 106588951B CN 201710057891 A CN201710057891 A CN 201710057891A CN 106588951 B CN106588951 B CN 106588951B
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zinc
organic framework
porous metal
framework compound
copper ion
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CN106588951A (en
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韩正波
罗景阳
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Wuhu Digital Information Industrial Park Co., Ltd
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Liaoning University
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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D495/00Heterocyclic compounds containing in the condensed system at least one hetero ring having sulfur atoms as the only ring hetero atoms
    • C07D495/02Heterocyclic compounds containing in the condensed system at least one hetero ring having sulfur atoms as the only ring hetero atoms in which the condensed system contains two hetero rings
    • C07D495/04Ortho-condensed systems
    • 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
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/28Treatment of water, waste water, or sewage by sorption
    • C02F1/285Treatment of water, waste water, or sewage by sorption using synthetic organic sorbents
    • 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 System
    • C07F3/003Compounds containing elements of Groups 2 or 12 of the Periodic System without C-Metal linkages
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/20Heavy metals or heavy metal compounds
    • 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

Abstract

The present invention relates to a kind of porous metal-organic framework compound and its preparation method and application based on zinc.The compound is by Zn (NO3)2·6H2O, [3,2-b] 1,4-Dithiapentalene base -2,5- dicarboxylic acids, n,N-Dimethylformamide, deionized water is added to the container, and under room temperature, is stirred 20-40 minutes;It is put into baking oven after container is sealed, under temperature 368K ± 50K, is kept for 2-4 days;It is slowly cooled to room temperature, is washed, filtered with n,N-Dimethylformamide, is dry, obtaining yellow transparent bulk crystals target product.Copper ion can be separated as adsorbing base with efficient selective based on the porous metal-organic framework of zinc prepared by the present invention.

Description

A kind of porous metal-organic framework compound and its preparation method and application based on zinc
Technical field
The preparation and application of the present invention relates to a kind of porous metal-organic framework compound based on zinc specifically relate to And a kind of preparation and its application of the porous metal-organic framework compound based on zinc with selective substances adsorption function.
Background technique
In recent years, metal organic framework compound (MOFs) has been widely used different functions, metal organic frame Compound connects into porous material by metal ion and organic ligand, itself there is a big specific surface area, adjustable orifice size, with And hole surface can functionalization.Because of their design feature, metallic framework compound be widely used in gas separation and it is organic Molecule separation, including organic dyestuff, organic isomers or even fullerene etc., as the product that multidisciplinary field intersects, metal has The design of machine framework compound synthesizes and performance study has developed into very active one of the field of Recent study.However seldom Applied to separating metal ions, transition metal ions size is very close, and relying solely on pore size cannot efficiently separate, so logical The interaction crossed between metal ion and metal organic framework can be able to achieve the separation of different metal ions.
Heavy metal pollution, which has become, seriously threatens environmental and public health.Heavy metal ion, even if in low concentration, for work Organism have very strong toxicity.Heavy metal be it is nondegradable, have for environment and biosystem very serious negative It influences, copper ion is one of element necessary to human body, but copper ion excessively understands heavy metal excessively and can result in a series of minds Through systemic disease.Therefore, copper ion is effectively removed to be very important.
Summary of the invention
The purpose of the present invention is utilize [3,2-b] 1,4-Dithiapentalene base -2,5- dicarboxylic acids using metallic zinc as metal node As organic ligand, at a certain temperature, a kind of porous metal-organic framework based on zinc is synthesized using the method for solvent heat Compound.
The technical solution adopted by the present invention is that:
A kind of porous metal-organic framework compound based on zinc, the preparation method is as follows:
1) by Zn (NO3) 26H2O, [3,2-b] 1,4-Dithiapentalene base -2,5- dicarboxylic acids and is gone at n,N-Dimethylformamide Ionized water is added to the container, and under room temperature, is stirred 20-40 minutes;
2) it is put into after sealing container in baking oven, under 368K ± 50K, is kept for 2-4 days;
3) it is slowly cooled to room temperature, after standing at least 1 day, obtains crystal;
4) it is washed, is filtered with n,N-Dimethylformamide, it is dry, obtain target product.
The porous metal-organic framework compound based on zinc, the porous metal-organic framework based on zinc The crystal for closing object belongs to cubic system, space group Fm3m.
The porous metal-organic framework compound based on zinc, Zn (NO3) 26H2O and [3,2-b] in step 1) The mass ratio of 1,4-Dithiapentalene base -2,5- dicarboxylic acids is 5:3.
The porous metal-organic framework compound based on zinc is put into baking oven after sealing container in step 2), Heating rate is 2-8Kmin-1.
The porous metal-organic framework compound based on zinc, the rate of temperature fall being slowly cooled to room temperature in step 3) For 2-8Kh-1.
The porous metal-organic framework compound based on zinc described in a kind of adsorbs in transition metal as adsorbing base The application of copper ion.
The application, the method is as follows: in organic containing the porous metals based on zinc are added in copper ion solution Framework compound impregnates, absorption.
The application, the copper ion are Gerhardite solution.
The beneficial effects of the present invention are: a kind of porous metal-organic framework compound based on zinc prepared by the present invention can It is applied to the rear synthesis field of host-guest chemistry as material of main part.A kind of prepared porous metal-organic framework based on zinc It can be used as adsorbing base to adsorb copper ion, efficient selective separates copper ion.Porous gold based on zinc of the invention It is simple to belong to organic backbone preparation method, has great application prospect.
Detailed description of the invention
Fig. 1 is the synthesis schematic diagram of the porous metal-organic framework compound the present invention is based on zinc.
Fig. 2 is the duct schematic diagram of the porous metal-organic framework compound the present invention is based on zinc.
Fig. 3 is that the present invention is based on the porous metal-organic framework compound chromatographic columns of zinc to select separation copper ion and cobalt ions Solution picture.
Fig. 4 is that the present invention is based on the histograms of the porous metal-organic framework compound of zinc absorption transition metal ions.
Fig. 5 is the histogram of the porous metal-organic framework compound Selective Separation copper ion the present invention is based on zinc.
Specific embodiment
A kind of porous metal-organic framework compound based on zinc of embodiment 1
The preparation method is as follows:
1) by the Zn (NO of 10mg3)2·6H2[3,2-b] 1,4-Dithiapentalene base -2,5- dicarboxylic acids of O, 6mg, the N of 1ml, N- bis- Methylformamide, the deionized water of 1ml is added in the vial that volume is 5ml, and normal temperature condition stirs 30 minutes.
2) vial is sealed and is put into baking oven.Heating makes the temperature of baking oven reach 368K from room temperature, and heating rate is 5K·min-1, and maintain the temperature at and keep the temperature 72 hours under this condition.
3) with 5Kh-1Rate of temperature fall be slowly cooled to room temperature, obtain yellow transparent bulk crystals;
4) it washed, filter and is dried in air with n,N-Dimethylformamide (DMF) solution, as target product is based on The porous metal-organic framework of zinc, yield 68%.
The present invention is based on the synthesis of the porous metal-organic framework compound of zinc as shown in Figure 1, its structure as shown in Fig. 2, The crystal structure belongs to monoclinic system, and space group is cube Fm3m.The compound is matched as node by dicarboxylic acids by four core zinc clusters Three-dimensional structure made of body bridging.Cation [(CH3)2NH2]+It is located in the duct of the MOF as counter ion counterionsl gegenions.Each [3,2- B] 1,4-Dithiapentalene base -2,5- dicarboxylic acids and two zinc clusters are coordinated.
A kind of porous metal-organic framework compound based on zinc of embodiment 2 adsorbs the selection of copper ion
Method: using embodiment 1 preparation based on zinc porous metal-organic framework compound as adsorbing base to copper ion into Row absorption.
1) Cu (NO is taken3)2·6H2O、Co(NO3)2·6H2O、Ni(NO3)2·6H2O、Cd(NO3)2·6H2O、Pb(NO3)2· 6H2O is dissolved in DMF solution respectively, obtains M (NO3)2·nH2O (M=Cu2+、Co2+、Ni2+、Cd2+、Pb2+) concentration be respectively 1 ×10-4The metallic solution of M.
Metallic solution 3ml is taken, the porous metal-organic framework crystal 30mg based on rare earth is added, impregnates at room temperature.4h Afterwards, filtering is taken out, and after processing, tests tenor by ICP.It as a result as shown in table 1 and Fig. 4, is M/Er (M=Cu in table2+、 Co2+、Ni2+、Cd2+、Pb2+) contain numerical quantity.By table 1 and Fig. 4 as it can be seen that content of copper ion is very high, and Pb2+、Co2+、Ni2+、Cd2+ Content it is very low.This illustrates that the porous metal-organic framework compound of the invention based on zinc has selection well to copper ion Property absorption.
Table 1 is the ICP test gold the present invention is based on the porous metal-organic framework compound of zinc absorption transition metal ions Belong to content table.
2) Cu (NO has been taken3)2·6H2O、Co(NO3)2·6H2O、Ni(NO3)2·6H2O is dissolved in DMF, obtains Cu2+,Co2 +,Ni2+Concentration is respectively 1 × 10-4The mixed metal solution of M.
Mixed metal solution 3ml is taken, the porous metal-organic framework crystal 30mg based on zinc is added, soaks 4h at room temperature Afterwards, filtering is taken out, and after processing, tests tenor by ICP.It as a result is M/Er (M=Cu in table as shown in table 2 and Fig. 52+、 Co2+、Ni2+).By table 2 and Fig. 5 as it can be seen that the content of copper ion is very high, and Co2+、Ni2+Content it is very low, this illustrates base of the present invention There is good selective absorption to copper ion in the crystal structure of the porous metal-organic framework of zinc.Table 2 be the present invention is based on The ICP of the porous metal-organic framework Selective Separation copper ion of zinc tests tenor table.
Metal ions(M) M/Er Mass(experimental) M/Zn Mol ratio(calculation)
Cu2+ 58.16/70.71 0.91
Co2+ 7.37/70.71 0.12
Ni2+ 4.13/70.71 0.07
3) the organic machine skeleton crystal of metal based on zinc is studied by ion chromatographic column to Cu2+And Co2+High efficiency selected Property.
Take Cu (NO3)2·6H2O、Co(NO3)2·6H2O is dissolved in DMF, is obtained containing Cu2+And Co2+Concentration is 0.2mol/ The solution of L.
The organic machine skeleton crystal of metal based on zinc is put into chromatographic column, ion chromatographic column (80mm × 5mm) is obtained, takes The Cu of 2ml2+And Co2+Mixed liquor injection the organic machine skeleton crystal of metal based on zinc be put into chromatographic column, as a result as shown in figure 3, Cu2+Retain in the chromatography column, Co2+It is filtered out with DMF.This illustrates of the invention organic based on the porous metals containing thiophene The crystal structure of skeleton has good selective absorption to copper ion.This illustrates that the porous metals of the invention based on zinc are organic Framework compound has good selective absorption to copper ion.

Claims (7)

1. a kind of porous metal-organic framework compound based on zinc, which is characterized in that the porous metals based on zinc have The crystal of machine framework compound belongs to cubic system, space group Fm3m, and preparation method is as follows:
1) by Zn (NO3)2·6H2O, [3,2-b] 1,4-Dithiapentalene base -2,5- dicarboxylic acids, n,N-Dimethylformamide and deionization Water is added to the container, and under room temperature, is stirred 20-40 minutes;
2) it is put into after sealing container in baking oven, under 368K ± 50K, is kept for 2-4 days;
3) it is slowly cooled to room temperature, after standing at least 1 day, obtains crystal;
4) it is washed, is filtered with n,N-Dimethylformamide, it is dry, obtain target product.
2. the porous metal-organic framework compound according to claim 1 based on zinc, it is characterised in that: Zn in step 1) (NO3)2·6H2The mass ratio of O and [3,2-b] 1,4-Dithiapentalene base -2,5- dicarboxylic acids is 5:3.
3. the porous metal-organic framework compound according to claim 1 based on zinc, it is characterised in that: will in step 2) It is put into baking oven after container sealing, heating rate 2-8Kmin-1
4. the porous metal-organic framework compound according to claim 1 based on zinc, it is characterised in that: delay in step 3) The rate of temperature fall of slow cool down to room temperature is 2-8Kh-1
5. a kind of porous metal-organic framework compound based on zinc as described in claim 1 is as adsorbing base in transition gold The application of copper ion is adsorbed in category.
6. application according to claim 5, it is characterised in that method is as follows: in containing described in addition in copper ion solution Porous metal-organic framework compound based on zinc impregnates, absorption.
7. application according to claim 5, it is characterised in that: the copper ion is Gerhardite solution.
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CN107177038B (en) * 2017-04-21 2020-04-21 辽宁师范大学 Moisture-resistant MOF-5-like compound, preparation method and application
CN107759802B (en) * 2017-10-25 2020-05-01 中国科学技术大学 Preparation method of high-molecular organic ligand, preparation method of high-molecular metal organic framework, ion separation membrane and preparation method of ion separation membrane
CN109046255A (en) * 2018-08-30 2018-12-21 东北师范大学 A kind of metal-organic framework desulfuration adsorbent and preparation method thereof

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