CN106188108A - The metal-organic framework materials of a kind of Cd and preparation method and applications - Google Patents

The metal-organic framework materials of a kind of Cd and preparation method and applications Download PDF

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CN106188108A
CN106188108A CN201610534675.3A CN201610534675A CN106188108A CN 106188108 A CN106188108 A CN 106188108A CN 201610534675 A CN201610534675 A CN 201610534675A CN 106188108 A CN106188108 A CN 106188108A
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谢亚勃
盛术楠
李建荣
秦茜
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Beijing University of Technology
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    • G01N21/62Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
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    • G01N21/6428Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes"
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Abstract

The metal-organic framework materials of a kind of Cd and preparation method and applications, belong to the technical field of crystalline material.Chemical molecular formula is CdL0.5dpe0.5·2H2O, L are organic ligand 4,8 disulfonic acid base 2,6 naphthalene dicarboxylic acids;Dpe is ancillary organic ligands 1,2 2 (4 pyridine radicals) ethylene (1,2 di (4 pyridyl) ethylene).Under sealing condition, organic ligand L (4,8 disulfonic acid base 2,6 naphthalene dicarboxylic acids), ancillary organic ligands dpe (1,2 two (4 pyridine radicals) ethylene) with four nitric hydrate cadmiums at DMA (N, N dimethyl acetylamide) and H2In the mixed solution of O, obtain the crystal of metal-organic framework materials via thermal response.This metal-organic framework materials has stronger fluorescence, the selective enumeration method material of available nitro explosive 2,4,6 trinitrophenol (TNP).

Description

The metal-organic framework materials of a kind of Cd and preparation method and applications
Technical field
The invention belongs to the technical field of crystalline material, technology relates to metal organic coordination polymer material, and particularly one Plant the metal-organic framework materials of Cd, preparation method and applications.
Background technology
Quickly and selectively detecting explosive is to concern Homeland Security, Military Application, accident investigation and minefield to analyze One of burning issue.Nitroaromatic such as 2,4,6-trinitrotoluene (2,4,6-trinitrotoluene, TNT), 2,4-dinitrotoluene (DNT)s (2,4-dinitrotoluene, 2,4-DNT), 2,4,6-trinitrophenol (2,4,6- Trinitrophenol, TNP) it is all the main material of industrial explosion thing, and be present in untapped minefield all over the world.Its In, the nitro explosive TNP explosive force than TNT is high, and is widely used in dyestuff, fireworks and firecrackers, match, glass and leather In industry.Except its explosion property, TNP is also regarded as a kind of severe toxicity pollutant.In mammal metabolic process, TNP will 4,6-dinitro-2-aminophenol. (2-amino-4,6-dinitrophenol,DNP) can be changed into, and the ability of 4,6-dinitro-2-aminophenol. induction mutant organism is the ten of TNP Times.During commodity production and use, TNP is emitted in environment, causes the pollution of soil and aqueous systems.Therefore, detection soil And the nitroaromatic in subsoil water buries and the explosive TNP in water and the environmental monitoring near ordnance base following the trail of It is critical that.At present the detection method of intense explosion thing mainly includes the instrument of dog and precision, but these instruments mostly expensive, Complicated and be likely to go wrong in the field applied.By comparison, method based on the detection of change in fluorescence means enjoys The concern of people, because the advantage such as selectivity is high, simple to operate, response time is short and all can use in solid-liquid is biphase.Multiple Material includes that conjugated organic molecule, nanoparticle and metal composite etc. have been applied to explosive detection based on change in fluorescence Process.
Metal-organic framework materials (MOFs) or coordination polymer (PCPs) are because its specific surface area is high, the designability of skeleton And host-guest interaction, and be widely used in gas store/separate, be catalyzed, induction apparatus, photoelectricity, clean energy resource and biology The aspects such as medical science.Especially as fluorescence induction apparatus MOFs material than traditional fluorogen advantageously.First, its skeleton Designability can improve the interaction between Subjective and Objective, and as the preconcentrator of target analytes.Secondly, MOFs fixes Organic ligand causes stronger radiation owing to not having the reduction of radiative relaxation.Organic ligand and the multi-selection of metal center, The characteristic electron of MOFs material can be regulated well.It addition, its analyte to selecting of introducing imparting of secondary functional group is excellent First bonding, this may result in preferably selectivity.
Summary of the invention
It is an object of the invention to provide a kind of metal-organic framework materials and preparation method and applications.
A kind of 3-dimensional metal organic framework material of the present invention, it is characterised in that chemical molecular formula is CdL0.5dpe0.5· 2H2O, L are organic ligand, are 4,8-disulfonic acid base-2,6-naphthalene dicarboxylic acids;Dpe is ancillary organic ligands 1,2-bis-(4-pyridine Base) ethylene (1,2-di (4-pyridyl) ethylene).H2O molecule draws according to crystal structural data and charge balance theory 's.
The crystal structure of this 3-dimensional metal organic framework material belongs to monoclinic system, and space group is P21/ n, cell parameter For:α=90.00 °, β= 90.6602 (9) °, γ=90.00 °.From the point of view of connection is constructed, Cd in framing structure2+Use typical hexa-coordinate, respectively With a L4-Two O atom on middle carboxyl, another L4-Sulfonic group O atom in part, respectively from two H2In O molecule An atom N coordination in two O atom, assistant ligand dpe, defines the octoploids structure of a distortion.Each of which Carboxyl is all with η11Pattern connect Cd2+, L4-In carboxyl and sulfonic group be involved in coordination, i.e. one L4-Connect four Cd2+ Define a similar 2D Rotating fields.Meanwhile, multiple 2D Rotating fields superpositions, along the direction of superposition, assistant ligand dpe is as column Part, the Cd1 ion in each layer and the atom N coordination in dpe part, make to be interconnected to form a 3D between layers The structure of class layer column.
Wherein organic ligand 4,8-disulfonic acid base-2,6 naphthalene dicarboxylic acid and the chemical structural formula of assistant ligand dpe:
The synthetic method of metal-organic framework materials of the present invention, comprises the following steps:
Under sealing condition, organic ligand L (4,8-disulfonic acid base-2,6-naphthalene dicarboxylic acids), ancillary organic ligands dpe (1,2- Two (4-pyridine radicals) ethylene) with four nitric hydrate cadmiums at DMA (DMAC N,N' dimethyl acetamide) and H2In the mixed solution of O, via Thermal response obtains the crystal of metal-organic framework materials.
Wherein organic ligand L (4,8-disulfonic acid base-2,6 naphthalene dicarboxylic acid), ancillary organic ligands dpe (1,2-bis-(4-pyrrole Piperidinyl) ethylene) be (1~3) with the mol ratio of four nitric hydrate cadmiums: (1~3): 1, the four nitric hydrate cadmiums of every 0.035 mM The N,N-dimethylacetamide of corresponding 0.5mL~2mL, the H of 0.1mL~1.5mL2O.The temperature of described thermal response is 60 DEG C-120 DEG C, the response time is 20-50 hour.
This metallo-organic framework belongs to fluorescent type MOF material, can be used for nitro explosive, especially contains the nitro of hydroxyl The selective enumeration method of explosive such as TNP.
The metal-organic framework materials novel structure of the present invention, has stronger fluorescence, and framing structure is stable, can be to nitro Explosive carries out selective enumeration method, has potential application in terms of selective enumeration method nitro explosive TNP and fluorescent probe.This Invention preparation method technique is simple, easy to implement, productivity is high, is conducive to large-scale popularization.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of metallic atom coordination mode in this metal-organic framework materials;
Fig. 2 is the structural representation of this metal-organic framework materials.
Fig. 3 is in the presence of other nitro explosives, and this metal-organic framework materials is to TNP selective enumeration method schematic diagram.
Fig. 4 is the different nitro explosive fluorescent quenching efficiency to this metal-organic framework materials.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described, but the present invention is not limited to following example.
Embodiment 1
By organic ligand L (0.035 mM), assistant ligand dpe (0.035 mM) and four nitric hydrate cadmiums (0.035 MM) mix homogeneously in the N,N-dimethylacetamide of 1mL, add 0.1mL H2O, encloses in bottle.Warp at 80 DEG C The crystal of metal-organic framework materials within 24 hours, is obtained by thermal response.
Embodiment 2
By organic ligand L (0.035 mM), assistant ligand dpe (0.019 mM) and four nitric hydrate cadmiums (0.035 MM) mix homogeneously in the N,N-dimethylacetamide of 1mL, add 0.5mL H2O, encloses in bottle.Warp at 80 DEG C The crystal of metal-organic framework materials within 48 hours, is obtained by thermal response.
Embodiment 3
By organic ligand L (0.019 mM), assistant ligand dpe (0.035 mM) and four nitric hydrate cadmiums (0.035 MM) mix homogeneously in the N,N-dimethylacetamide of 1.5mL, add 0.5mL H2O, encloses in bottle.At 80 DEG C The crystal of metal-organic framework materials within 48 hours, is obtained via thermal response.
Embodiment 4
By organic ligand L (0.035 mM), assistant ligand dpe (0.035 mM) and four nitric hydrate cadmiums (0.035 MM) mix homogeneously in the N,N-dimethylacetamide of 2mL, add 0.5mL H2O, encloses in bottle.Warp at 100 DEG C The crystal of metal-organic framework materials within 24 hours, is obtained by thermal response.
The test result of the product of above-described embodiment gained is identical, is specifically shown in following:
(1) crystal structure determination:
Choose the monocrystalline of suitable size under the microscope, under 100K, utilize Agilent Technologies SuperNova single crystal diffractometer, through the Mo-K α of graphite monochromator monochromatizationRay, withMode Collect diffraction data.All diffraction datas use SADABS program to carry out absorption correction.Cell parameter uses method of least square true Fixed.Data convert and structure elucidation use SAINT and SHELXTL-97 program to complete respectively.First with difference functions method and a young waiter in a wineshop or an inn Multiplication determines whole non-hydrogen atom coordinate, and obtains hydrogen atom position, then with SHELXTL-97 to crystal with theoretical hydrogenation method Structure carries out refine.Fig. 1 and Fig. 2 be shown in by structure chart.Crystallographic data is shown in Table 1.
The crystallographic data of table 1 metal-organic framework materials
The structure chart of Fig. 1 shows: this framing structure Cd1 ion uses typical hexa-coordinate, respectively with a L4-Middle carboxyl On two O atom, a L4-Sulfonic group O atom, two H in part2In two O atom in O molecule and assistant ligand dpe The coordination of atom N, define the octoploids structure of a distortion.
The structure chart of Fig. 2 shows: each carboxyl is with η11Pattern connect Cd2+, L4-In carboxyl and sulfonic group all Participate in coordination, i.e. one L4-Connect four Cd2+Define a similar 2D Rotating fields.Meanwhile, along b direction of principal axis, assistant ligand Dpe, as column part, the Cd1 ion in each layer and the atom N coordination in dpe part, makes to be connected with each other between layers Define the structure of a 3D class layer column.
(2) in the presence of other nitro explosives, the material selective enumeration method performance characterization to TNP:
Fig. 3 is the metal-organic framework materials sign to nitro explosive TNP selective enumeration method performance.In Fig. 3, in room temperature Under the conditions of, at alternate dropwise addition 2, when 4-dinitrotoluene (DNT) and TNP, only when adding TNP, its fluorescence intensity just can reduce, i.e. Metal-organic framework materials has selective response to TNP.Illustrate that metal-organic framework materials has good selectivity to TNP Detection performance.
Fig. 4 is the different nitro explosive fluorescent quenching efficiency to metal-organic framework materials.In Fig. 4, add identical dense After the different nitro explosives of degree, TNP is maximum to its fluorescent quenching efficiency, and explanation metal-organic framework materials is to TNP again There is good selective enumeration method performance.

Claims (7)

1. a metal-organic framework materials, it is characterised in that chemical molecular formula is CdL0.5dpe0.5·2H2O, L are organic ligand 4,8-disulfonic acid base-2,6 naphthalene dicarboxylic acid;Dpe is ancillary organic ligands 1,2-bis-(4-pyridine radicals) ethylene (1,2-di (4- pyridyl)ethylene)。
2. according to a kind of metal-organic framework materials of claim 1, it is characterised in that crystal structure belongs to monoclinic system, space Group is P21/ n, cell parameter is: α=90.00 °, β=90.6602 (9) °, γ=90.00 °.
3. according to a kind of metal-organic framework materials of claim 1, it is characterised in that from the point of view of connection is constructed, skeleton Cd in structure2+Use typical hexa-coordinate, respectively with a L4-Two O atom on middle carboxyl, another L4-Sulfonic acid in part Base O atom, respectively from two H2Two O atom in O molecule, an atom N coordination in assistant ligand dpe, define The octoploids structure of one distortion.Each of which carboxyl is all with η11Pattern connect Cd2+, L4-In carboxyl and sulfonic group It is involved in coordination, i.e. one L4-Connect four Cd2+Define a similar 2D Rotating fields.Meanwhile, multiple 2D Rotating fields superpositions, Along the direction of superposition, assistant ligand dpe is coordinated with the atom N in dpe part as column part, the Cd1 ion in each layer, Make to be interconnected to form between layers the structure of a 3D class layer column.
4. the method for preparation material described in claim 1, it is characterised in that comprise the following steps: under sealing condition, You Jipei Body L (4,8-disulfonic acid base-2,6 naphthalene dicarboxylic acid), ancillary organic ligands dpe (1,2-bis-(4-pyridine radicals) ethylene) and four hydrations Chromic nitrate is at DMA (DMAC N,N' dimethyl acetamide) and H2The mixed solution of O, obtains metal-organic framework materials via thermal response Crystal.
5. according to the method for claim 1, it is characterised in that organic ligand L (4,8-disulfonic acid base-2,6-naphthalene dicarboxylic acids), auxiliary Helping organic ligand dpe (1,2-di(4-pyridyl)ethylene) is (1~3) with the mol ratio of four nitric hydrate chromium: (1~3): 1, often Four nitric hydrate chromium correspondence 1mL~the N,N-dimethylacetamide of 2mL of 0.035 mM, the H of 0.1mL~1.5mL2O.Institute Stating the temperature 60 C-120 DEG C of thermal response, the response time is 20-50 hour.
6. the application of a kind of metal-organic framework materials described in claim 1, as nitro explosive selective enumeration method material.
7. the application of a kind of metal-organic framework materials described in claim 1, is used as the nitro explosive containing hydroxyl and selects Property detection material.
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Cited By (5)

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CN107955183A (en) * 2017-12-01 2018-04-24 淮北师范大学 A kind of coordination polymer with light reaction and preparation method thereof
CN109507317A (en) * 2018-11-19 2019-03-22 中国农业科学院农业质量标准与检测技术研究所 A kind of Application in Sensing of gallium metal organic framework material in detection incretion interferent
CN110240706A (en) * 2019-06-06 2019-09-17 南京邮电大学 A kind of novel C d-MOF material and its preparation method and application
CN113501970A (en) * 2021-08-23 2021-10-15 中原工学院 Cadmium coordination polymer and composite membrane material thereof, preparation method and application
CN115403492A (en) * 2021-05-26 2022-11-29 中国石油化工股份有限公司 Metal organic framework material with biphenyl structure, preparation method and application thereof, and carboxylic acid esterification method

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107955183A (en) * 2017-12-01 2018-04-24 淮北师范大学 A kind of coordination polymer with light reaction and preparation method thereof
CN109507317A (en) * 2018-11-19 2019-03-22 中国农业科学院农业质量标准与检测技术研究所 A kind of Application in Sensing of gallium metal organic framework material in detection incretion interferent
CN109507317B (en) * 2018-11-19 2021-05-28 中国农业科学院农业质量标准与检测技术研究所 Sensing application of gallium metal organic framework material in detecting endocrine disruptors
CN110240706A (en) * 2019-06-06 2019-09-17 南京邮电大学 A kind of novel C d-MOF material and its preparation method and application
CN110240706B (en) * 2019-06-06 2021-05-11 南京邮电大学 Cd-MOF material and preparation method and application thereof
CN115403492A (en) * 2021-05-26 2022-11-29 中国石油化工股份有限公司 Metal organic framework material with biphenyl structure, preparation method and application thereof, and carboxylic acid esterification method
CN115403492B (en) * 2021-05-26 2024-04-02 中国石油化工股份有限公司 Metal organic framework material with biphenyl structure, preparation method and application thereof, and carboxylic acid esterification method
CN113501970A (en) * 2021-08-23 2021-10-15 中原工学院 Cadmium coordination polymer and composite membrane material thereof, preparation method and application
CN113501970B (en) * 2021-08-23 2022-08-19 中原工学院 Cadmium coordination polymer and composite membrane material thereof, preparation method and application

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