CN105669779A - Synthesis method for increasing Pd content of metal organic framework based on Zr(IV) ions - Google Patents

Synthesis method for increasing Pd content of metal organic framework based on Zr(IV) ions Download PDF

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CN105669779A
CN105669779A CN201610128644.8A CN201610128644A CN105669779A CN 105669779 A CN105669779 A CN 105669779A CN 201610128644 A CN201610128644 A CN 201610128644A CN 105669779 A CN105669779 A CN 105669779A
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CN105669779B (en
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董育斌
李延安
杨松
刘启奎
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Shandong Normal University
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    • B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
    • B01J31/16—Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
    • B01J31/1691—Coordination polymers, e.g. metal-organic frameworks [MOF]
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    • B01J31/2204—Organic complexes the ligands containing oxygen or sulfur as complexing atoms
    • B01J31/2208—Oxygen, e.g. acetylacetonates
    • B01J31/2226—Anionic ligands, i.e. the overall ligand carries at least one formal negative charge
    • B01J31/2243—At least one oxygen and one nitrogen atom present as complexing atoms in an at least bidentate or bridging ligand
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    • C07C253/30—Preparation of carboxylic acid nitriles by reactions not involving the formation of cyano groups
    • C—CHEMISTRY; METALLURGY
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    • C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C07C45/27—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation
    • C07C45/29—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation of hydroxy groups
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    • B01J2231/30—Addition reactions at carbon centres, i.e. to either C-C or C-X multiple bonds
    • B01J2231/34—Other additions, e.g. Monsanto-type carbonylations, addition to 1,2-C=X or 1,2-C-X triplebonds, additions to 1,4-C=C-C=X or 1,4-C=-C-X triple bonds with X, e.g. O, S, NH/N
    • B01J2231/341—1,2-additions, e.g. aldol or Knoevenagel condensations
    • B01J2231/342—Aldol type reactions, i.e. nucleophilic addition of C-H acidic compounds, their R3Si- or metal complex analogues, to aldehydes or ketones
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    • B01J2531/00—Additional information regarding catalytic systems classified in B01J31/00
    • B01J2531/80—Complexes comprising metals of Group VIII as the central metal
    • B01J2531/82—Metals of the platinum group
    • B01J2531/824—Palladium

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Abstract

The invention discloses a synthesis method for increasing the Pd content of a metal organic framework based on Zr(IV) ions. The method comprises the following steps: performing a coordination polymerization reaction between an organic ligand (I) and ZrCl4, and performing post-synthesis modification of the product, wherein the post-synthesis modification comprises the following specific steps: enabling a coordination polymerization reaction product, 2-pyridylaldehyde or salicylaldehyde and a catalyst formic acid in a molar ratio of 1:(1-4):(0.1-0.3) to react in an organic solvent; performing centrifugal washing of the product and dispersing in an organic solvent; adding palladium nitrate in a molar ratio of 1:(0.8-1.2); after the reactions, centrifuging and drying to obtain powder; dispersing the obtained powder into water; adding sodium borohydride in a molar ratio of 1:(0.5-1.5); and after the reactions, centrifuging, washing and drying to obtain the product. In the invention, the synthesized compound is an organic-inorganic composite supermolecular material and has a metal organic framework which is easy to operate and low in cost and has nanoscale particle size; and the compound has very high efficiency when being used as a catalytic material for benzyl alcohol oxidation and benzaldehyde condensation.

Description

A kind of synthetic method improving the metal organic frame Pd content based on Zr (IV) ion
Technical field
The present invention relates to the synthetic method of the metal organic frame based on Zr (IV) ion (being labeled as: PdUiO-68-IP), be specifically related to a kind of synthetic method improving the metal organic frame Pd content based on Zr (IV) ion.
Background technology
Benzaldehyde is one of simplest aromatic aldehyde, widely exists in plant especially rosaceous plant, is mainly present in the peel of stem of plant, leaf or seed with the form of glycosides. Benzaldehyde is the food synthetic perfume allowing to use of GB GB2076-2011 regulation, can be used for preparing Fructus Pruni pseudocerasi, cocoa, vanilla, almond essence. Industrial also have been widely used, as a kind of important industrial chemicals, be used for preparing lauryl aldehyde, lauric acid, hyacinthin and benzyl benzoate etc.; It is used as measure ozone, phenol, alkaloid and be positioned at the methylene reagents that carboxyl is other; Can as special head perfume (or spice) spice, trace is used for fragrance of a flower formula, in Syringa oblata Lindl., white orchid, jasmine, violet, Acacia farnesiana Willd., sunflower, sweet tofu pudding, Flos Mume, orange blossom etc. Fancy soap also can use; Benzaldehyde is the intermediate of herbicide difenzoquat, plant growth regulator inabenfide; Medicine, dyestuff, spice intermediate. For producing methoxybenzaldehyde, light green, benzylideneacetone etc., it is used for being in harmonious proportion fragrance for detergents, edible essence etc.
The preparation method of benzaldehyde mainly has: 1, chlorination toluene is in hydrolysis, with toluene for raw material, carries out chlorination under light illumination, obtains mixing benzyl chloride, in the method being hydrolyzed. 2, the method for benzyl alcohol oxidation. 3, toluene direct oxidation method. 4, with benzene for raw material, under pressurization and aluminum chloride effect, benzene obtains with monochlor(in)ate carbon and hcl reaction. Industrial at present prepare benzaldehyde mainly through the first and the 4th kind of method.
Benzyl alcohol is simplest one of fragrant and mellow, most in nature is present in essential oil with the form of ester, for instance all contain secondary composition in Flos Jasmini Sambac oil, hyacinth oil and Peruvian balsam. Specifying that in GB GB2760-1996 it is the spice temporarily allowing to use, but its consumption is also had strict regulation, benzyl alcohol is for limiting the use of preservative in components of cosmetics, and research on maximum utilized quantity is 1%.Industrially benzyl alcohol falls within and fires dangerous materials, poisonous, has zest. Human body is had bigger harm by benzyl alcohol, has anesthetic action, and eye, upper respiratory tract, skin are had stimulation, and absorption can cause headache, Nausea and vomiting, GI irritation, convulsions, stupor. Benzyl alcohol is carried out catalytic oxidation, prepares benzaldehyde no matter in industry or have important prospect and meaning in environmental conservation. The metal organic frame Pd content that existing method prepares is low, when catalytic phenylmethanol is oxidized to benzaldehyde, catalytic efficiency and productivity are low, and the temperature needed in catalytic process is higher, it is necessary to the shortcoming such as just can carry out under an atmospheric Oxygen Condition.
Summary of the invention
The purpose of the present invention is contemplated to solve the problems referred to above, one is provided to improve the synthetic method of the metal organic frame Pd content based on Zr (IV) ion, organic frame catalyst prepared by the method has simple to operate when catalytic oxidation benzyl alcohol is benzaldehyde, when low-temperature environment-friendly, again can the condensation reaction of catalysis benzaldehyde.
To achieve these goals, the present invention adopts the following technical scheme that
A kind of synthetic method improving the metal organic frame Pd content based on Zr (IV) ion, first by organic ligand (I) and ZrCl4Carry out coordination poly-merization, then by product through synthetic modification later; Specifically comprising the following steps that of described rear synthetic modification
(1) organic ligand (I) and ZrCl4Carrying out coordination poly-merization product, 2-pyridine carboxaldehyde or salicylide, catalyst formic acid is placed in container by molar ratio 1:1-4:0.1-0.3, reacts in organic solvent;
(2) by after reacted for step (1) product centrifuge washing, it is scattered in organic solvent, Palladous nitrate. (referring to: step (1) reacted product: Palladous nitrate. is 1:0.8-1.2) is added by molar ratio 1:0.8-1.2, it is centrifuged after reaction, dries and to obtain powder;
(3) powder that described step (2) obtains is scattered in water, adds sodium borohydride (referring to: powder: sodium borohydride is 1:0.5-1.5) by molar ratio 1:0.5-1.5, and centrifugal after reaction, washing is dry, obtains product; Described organic ligand (I) is:
Reaction condition in described step (1) is particularly as follows: temperature is at 60-80 DEG C, and the time is 6-12 hour.
Reaction condition in described step (2) is particularly as follows: 60-80 DEG C is stirred 0.5-1.5 hour.
In described step (3), reaction condition is particularly as follows: be stirred at room temperature 5-15 minute.
Organic solvent in described step (1), (2) is ethanol, acetonitrile or oxolane.
Described organic ligand (I) and ZrCl4Carrying out coordination poly-merization, concrete step is:
(1)ZrCl4Organic ligand (I) is placed in DMF by rate of charge (mol ratio) 1:1, add glacial acetic acid, ultrasonic until organic ligand (I) be completely dissolved solution homogeneous after, this solution is placed in the baking oven risen in advance at 120 DEG C and places 24h, it is cooled to room temperature, centrifugal, obtain buff powder;
(2), after buff powder washing step (1) prepared in dispersion DMF, soak a period of time in 80 DEG C, centrifugal;
(3) product after step (2) being centrifuged is soaked in alcoholic solution again, places a period of times for 70 DEG C, finally dry at 80 DEG C of temperature, obtains UiO-68-NH2Buff powder.
The preparation method of described organic ligand (I) is as follows:
(1) with 2,5-dibromo anilines for raw material, obtaining intermediate A by the coupling reaction of palladium chtalyst and 4-methoxycarbonyl phenyl acid reaction, (this step is particularly as follows: 2,5-dibromo anilines, 4-methoxycarbonyl group phenylboric acid, cesium fluoride, (PPh3)4Pd is placed in single port bottle by molar ratio 1:3:4.75:0.33, adds anhydrous tetrahydro furan, stirs 48h, be cooled to room temperature, removal of solvent under reduced pressure under 80 DEG C of constant temperatures, and column chromatography for separation obtains the greenish yellow solid powder of intermediate A.)
Intermediate A structure is as follows:
(2) intermediate A is hydrolyzed in the basic conditions organic ligand (I) (this step particularly as follows: put into intermediate (I) in single port bottle, THF and MeOH, after solid is completely dissolved, add the KOH aqueous solution of 3%, constant temperature stirring 12h at 40 DEG C, after being cooled to room temperature, decompression removes THF and MeOH, add distilled water, be adjusted to pH < 2 with dilute hydrochloric acid. Greenish yellow solid precipitates out, and sucking filtration washes three times with water, and room temperature dries to obtain the greenish yellow solid powder of compound (I)).
The metal organic frame based on Zr (IV) ion that above-mentioned synthetic method obtains, the described metal organic frame based on Zr (IV) ion is the application in benzaldehyde or the reaction of catalysis benzaldehyde at catalytic oxidation benzyl alcohol, concrete application process is as follows: based on the metal organic frame of Zr (IV) ion, benzyl alcohol joins toluene by rate of charge (mol ratio) 1:100, in dimethylbenzene or acetonitrile solution, constant temperature stirring reaction under 80 DEG C of conditions, by gas chromatograph tracking reaction process, within 30 hours, catalytic oxidation productivity can reach more than 99%, or: based on the metal organic frame of Zr (IV) ion, benzaldehyde, Cyanoacetyl-Cyacetazid joins in methanol solution by rate of charge (mol ratio) 1:100:120, stirring reaction at ambient temperature, by gas chromatograph tracking reaction process, within 7 hours, catalytic oxidation productivity can reach more than 99%.
The invention has the beneficial effects as follows, compound belongs to Organic-inorganic composite supramolecular materials, and have simple to operate, cost is low and granular size is at the metal organic frame of nanoscale, it has very high efficiency as catalysis material and the benzaldehyde catalysis material of benzyl alcohol oxidation.
The chelating moieties that the synthetic method of the present invention produces mainly by subsequent reactions and metal Pd coordination, avoid the impact of uncertain factor when introducing Pd in prior art organic framework materials, the Pd stable content obtained and content are high, and the repeatability of catalyst is better.
The subsequent reactions of the metal organic frame that the present invention designs according to the feature of this part, if the change of the reactant changed in organic ligand, rear modification and ratio all can not get the PdUiO-68-IP of Pd stable content.
Accompanying drawing explanation
The surface sweeping electromicroscopic photograph figure of the metal organic frame (PdUiO-68-IP) of Zr (IV) ion in Fig. 1 embodiment 1;
The transmission electron microscope photo figure of the metal organic frame (PdUiO-68-IP) of Zr (IV) ion in Fig. 2 embodiment 1;
The X-Ray powder diagram of the metal organic frame (PdUiO-68-IP) of Zr (IV) ion in Fig. 3 embodiment 1;
The reference colour spectrogram of benzyl alcohol in Fig. 4 embodiment 2;
The reference colour spectrogram of benzaldehyde in Fig. 5 embodiment 2;
The chromatogram of PdUiO-68-IP catalytic oxidation benzyl alcohol in Fig. 6 embodiment 2;
The reference colour spectrogram of 2-benzylidenemalononitrile in Fig. 7 embodiment 3;
The chromatogram of PdUiO-68-IP catalysis benzaldehyde and Cyanoacetyl-Cyacetazid condensation reaction in Fig. 8 embodiment 3.
Detailed description of the invention
The preparation of the metal organic frame (PdUiO-68-IP) of embodiment 1:Zr (IV) ion
Under nitrogen protection, 2,5-dibromo anilines (10nmol, 2.51g), 4-methoxycarbonyl group phenylboric acid (30nmol, 5.4g), cesium fluoride (47.5nnmol, 7.22g), (PPh3)4Pd (3.3mmol, 3.8g), in 250mL there-necked flask, adds 150mL anhydrous tetrahydro furan, stirs 48h, be cooled to room temperature, removal of solvent under reduced pressure, column chromatography for separation (silicagel, CH under 80 DEG C of constant temperatures2Cl2) 2.3 grams of the greenish yellow solid powder of intermediate A, productivity: 64%.
Intermediate A (1.66mmol is put in 100mL single port bottle, 0.60g), THF (20mL) and MeOH (20mL), after solid is completely dissolved, adds 10mLKOH (3.0g, 53.6mmol) aqueous solution, constant temperature stirring 12h at 40 DEG C, after being cooled to room temperature, decompression removes THF and MeOH, add 100mL distilled water, be adjusted to pH < 2 with dilute hydrochloric acid. Greenish yellow solid precipitates out, and sucking filtration washes three times with water, and room temperature dries to obtain 0.45 gram of the greenish yellow solid powder of compound I, productivity: 81.45%.
ZrCl4(0.080mmol, 19.20mg), compound I (0.080mmol, 26.64mg) be placed in 3.2mLDMF, adding 240 μ L glacial acetic acid, ultrasonic 20min is after solid is completely dissolved, and this solution is placed in the baking oven risen in advance at 120 DEG C of temperature and places 24h, it is cooled to room temperature, centrifugal. Buff powder DMF washs three times, is redispersed in fresh DMF, soaks 6h in 80 DEG C, centrifugal. Buff powder is soaked in alcoholic solution again, places 2 days for 60 DEG C, wherein within every 12 hours, changes an alcoholic solution, finally dry at 80 DEG C of temperature, obtains UiO-68-NH2Buff powder.
UiO-68-NH2(0.67mmol, 0.30g), 2-pyridine carboxaldehyde (2.7mmol, 0.29g) is placed in single port bottle by rate of charge mol ratio (1:4), adds ethanol 60mL and 3 formic acid, and 70 DEG C are stirred 10 hours. Centrifugal, dried by washing with alcohol three times, it is scattered in 60mL acetonitrile solution, adds Palladous nitrate. (0.70mmol, 0.16g) by rate of charge (mol ratio) 1:1. After 70 DEG C of stirrings 1 hour, centrifugal, to obtain yellow powder with dry after acetonitrile wash 3 times. Yellow powder (0.50mmol, 0.30g), sodium borohydride (0.50mmol, 0.0019g) it is placed in 40mL water by rate of charge (mol ratio) 1:1, after being stirred at room temperature 10 minutes, centrifugal, with dry after deionized water wash 3 times, obtain black powder PdUiO-68-IP.
The metal organic frame (PdUiO-68-IP) of prepared Zr (IV) ion is used GeminiZeissSupraTMSem test, testing result is as shown in Figure 1.
The metal organic frame (PdUiO-68-IP) of prepared Zr (IV) ion is used JEM-2100 transmissioning electric mirror test, and testing result is as shown in Figure 2.
Using Brooker D8ADVANCEX-raypowderdiffractometerwithCuKaradiation diffractometer to test the metal organic frame (PdUiO-68-IP) of prepared Zr (IV) ion, testing result is as shown in Figure 3.
The metal organic frame (PdUiO-68-IP) of embodiment 2:Zr (IV) ion is as the application of benzyl alcohol oxidation catalysis material
PdUiO-68-IP (10mg, 1mol%), benzyl alcohol (1.0mmol) joins in 2mL toluene solution by rate of charge (mol ratio) 1:100, constant temperature stirring 30h under 80 DEG C of conditions, by gas chromatograph tracking reaction process, within 20 hours, catalytic oxidation productivity can reach more than 99%.
Being aoxidized by metal organic frame (PdUiO-68-IP) catalytic phenylmethanol of Zr (IV) ion, by gas chromatogram following response result, testing result is as shown in Figure 6.
The metal organic frame (PdUiO-68-IP) of embodiment 3:Zr (IV) ion is as the application of benzaldehyde catalysis material
PdUiO-68-IP (10mg, 1mol%), benzaldehyde (1.0mmol), Cyanoacetyl-Cyacetazid (1.0mmol) joins in methanol solution by rate of charge (mol ratio) 1:100:120, stir at ambient temperature, by gas chromatograph tracking reaction process, within 7 hours, catalytic oxidation productivity can reach more than 99%.
Being reacted by metal organic frame (PdUiO-68-IP) the catalysis benzaldehyde of Zr (IV) ion, by gas chromatogram following response result, testing result is as shown in Figure 8.
The specific embodiment of the present invention is described in conjunction with accompanying drawing although above-mentioned; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme, those skilled in the art need not pay various amendments or deformation that creative work can make still within protection scope of the present invention.

Claims (10)

1. improve a synthetic method for the metal organic frame Pd content based on Zr (IV) ion, it is characterized in that: first by organic ligand (I) and ZrCl4Carry out coordination poly-merization, then by product through synthetic modification later; The step that described rear synthetic modification is concrete is as follows:
(1) organic ligand (I) and ZrCl4Carrying out coordination poly-merization product, 2-pyridine carboxaldehyde or salicylide, catalyst formic acid is placed in container by molar ratio 1:1-4:0.1-0.3, reacts in organic solvent;
(2) by after reacted for step (1) product centrifuge washing, it is scattered in organic solvent, adds Palladous nitrate. by molar ratio 1:0.8-1.2, centrifugal after reaction, dry to obtain powder;
(3) powder that described step (2) obtains is scattered in water, adds sodium borohydride by molar ratio 1:0.5-1.5, and centrifugal after reaction, washing is dry, obtains product; Described organic ligand (I) is:
2. synthetic method as claimed in claim 1, is characterized in that: reaction condition in described step (1) is particularly as follows: temperature is at 60-80 DEG C, and the time is 6-12 hour.
3. synthetic method as claimed in claim 1, is characterized in that: reaction condition in described step (2) is particularly as follows: 60-80 DEG C is stirred 0.5-1.5 hour.
4. synthetic method as claimed in claim 1, is characterized in that: in described step (3), reaction condition is particularly as follows: be stirred at room temperature 5-15 minute.
5. synthetic method as claimed in claim 1, is characterized in that: the organic solvent in described step (1), (2) is ethanol, acetonitrile or oxolane.
6. synthetic method as claimed in claim 1, is characterized in that: described organic ligand (I) and ZrCl4Carrying out coordination poly-merization, concrete step is:
(1)ZrCl4Organic ligand (I) is placed in DMF by rate of charge (mol ratio) 1:1, add glacial acetic acid, ultrasonic until organic ligand (I) be completely dissolved solution homogeneous after, this solution is placed in the baking oven risen in advance at 120 DEG C and places 24h, it is cooled to room temperature, centrifugal, obtain buff powder;
(2), after buff powder washing step (1) prepared in dispersion DMF, soak a period of time in 80 DEG C, centrifugal;
(3) product after step (2) being centrifuged is soaked in alcoholic solution again, places a period of times for 70 DEG C, finally dry at 80 DEG C of temperature, obtains UiO-68-NH2Buff powder.
7. synthetic method as claimed in claim 1, is characterized in that: the preparation method of described organic ligand (I) is as follows:
(1) with 2,5-dibromo anilines for raw material, obtaining intermediate A by the coupling reaction of palladium chtalyst and 4-methoxycarbonyl phenyl acid reaction, intermediate A structure is as follows:
(2) intermediate A is hydrolyzed in the basic conditions to obtain organic ligand (I).
8. the metal organic frame based on Zr (IV) ion that the arbitrary described synthetic method of claim 1-7 obtains.
9. the metal organic frame based on Zr (IV) ion as claimed in claim 8 is the application in benzaldehyde or the reaction of catalysis benzaldehyde at catalytic oxidation benzyl alcohol.
10. apply as claimed in claim 9, it is characterized in that: concrete application process as follows: the metal organic frame based on Zr (IV) ion that the arbitrary described synthetic method of claim 1-7 obtains, benzyl alcohol joins in toluene, dimethylbenzene or acetonitrile solution by rate of charge (mol ratio) 1:100, constant temperature stirring reaction under 80 DEG C of conditions;
Or: the metal organic frame based on Zr (IV) ion that the arbitrary described synthetic method of claim 1-7 obtains, benzaldehyde, Cyanoacetyl-Cyacetazid joins in methanol solution by rate of charge (mol ratio) 1:100:120, stirring reaction at ambient temperature.
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CN111701619A (en) * 2020-03-16 2020-09-25 南昌大学 Immobilized catalyst for synthesizing KH-560 silane coupling agent and preparation method thereof
CN111701619B (en) * 2020-03-16 2023-08-25 南昌大学 Immobilized catalyst for synthesizing KH-560 silane coupling agent and preparation method thereof
CN111518143A (en) * 2020-05-22 2020-08-11 江南大学 Simple and rapid preparation of syringyl metal organic framework material and application thereof
CN114105901A (en) * 2020-08-27 2022-03-01 江西省科学院应用化学研究所 Metal organic framework based on Cd (II), composite catalyst, preparation method and application thereof
CN114105901B (en) * 2020-08-27 2022-12-02 江西省科学院应用化学研究所 Metal organic framework based on Cd (II), composite catalyst, preparation method and application thereof
CN112337509A (en) * 2020-11-05 2021-02-09 北京化工大学 MOF-based transition metal monatomic catalyst for carbon-carbon triple bond selective hydrogenation and preparation method thereof
CN112337509B (en) * 2020-11-05 2023-05-26 北京化工大学 MOF-based transition metal single-atom catalyst for selective hydrogenation of carbon-carbon triple bond and preparation method thereof

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