CN107442170A - A kind of chiral MOF composite catalysts and its preparation method and application - Google Patents

A kind of chiral MOF composite catalysts and its preparation method and application Download PDF

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CN107442170A
CN107442170A CN201710792059.2A CN201710792059A CN107442170A CN 107442170 A CN107442170 A CN 107442170A CN 201710792059 A CN201710792059 A CN 201710792059A CN 107442170 A CN107442170 A CN 107442170A
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chiral
mof
tryptophan
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aqueous solution
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匡轩
孙旭
魏琴
张勇
吴丹
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    • B01J31/16Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
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Abstract

It is used for the application for detecting chiral enantiomer the invention discloses a kind of chiral MOF composite catalysts and preparation method thereof and based on the composite, belongs to nano composite material, Metal-organic frame material and chiral sensing detection technical field.It, which will have main steps that, to be stored at room temperature, centrifuge after the aqueous solution blending of the alkaline aqueous solution of chiral ligand and copper acetate surface of graphene oxide activating agent, water washing, dry and be made.The chiral sensor built using the composite, it is notable for the detection of D (+) tryptophan and L () Tryptophan enantiomer content, simple, easy to operate, the chiral Detection results of method.

Description

A kind of chiral MOF composite catalysts and its preparation method and application
Technical field
The present invention relates to a kind of chiral MOF composite catalysts and its preparation method and application, belong to nano material, gold Belong to organic framework nano material and chiral sensing detection technical field.
Background technology
Chirality is one of essential attribute of nature, has a pair of chiral enantiomers, its chemical property is identical, thing Rationality matter is also identical in addition to optical direction is opposite, but the bioactivity of enantiomer is entirely different.For chiral medicine, An isomers in enantiomer may have drug effect, and another isomers may be invalid or even harmful.Sand profit in medical history Amine event is spent, be about born more than 12,000 lopsided baby, and it is that Thalidomide molecule has two kinds of structures of R and S to trace it to its cause Type enantiomer, the Thalidomide of wherein R configurations has neuroleptic effect, and the molecule of S configurations then has strong teratogenesis.This A pair of enantiomers without fractionation put goods on the market into huge numbers of families, result in the generation of tragedy.
According to incompletely statistics, current more than 2/3 medicine developed is chiral drug, the chiral drug of in the market 40% It is individual isomer.2002, chiral drug market was up to 159,000,000,000 dollars.Amino acid is the elementary cell of constitutive protein matter, Very important effect is played in human body and animal life activity.Optics pure amino acid is synthesis polypeptide and lactams antibiosis The important intermediate of the medicines such as element, in exploitation of pharmaceutical synthesis, new material synthesis, food additives and fine chemicals etc. All there is huge application value.However, artificial synthesized amino acid is racemic modification mostly.Therefore, develop detecting instrument into This is low, analysis efficiency is high, easy to operate, and operating technology requires the identifying and analyzing method of low amino acid enantiomer, has important Meaning.
The content of the invention
One of technical assignment of the present invention is to make up the deficiencies in the prior art, there is provided a kind of chiral MOF composites The preparation method of catalyst, the raw materials used cost of this method is low, and preparation technology is simple, and energy consumption of reaction is low, before having commercial Application Scape.
The two of the technical assignment of the present invention are to provide the purposes of the chiral MOF composite catalysts, will the chirality MOF composites are used for the content of efficient catalytic detection D- (+)-tryptophan and L- (-)-Tryptophan enantiomer, the testing cost It is low, analysis efficiency is high, easy to operate, operating technology require it is low.
Technical scheme is as follows:
A kind of 1. chiral MOF composite catalysts
The catalyst is made up of the graphene oxide-loaded chiral metal organic framework MOF crystal of nano-sheet, and crystal is footpath Wide 80-110 nm nanometer rods, its chemical formula are [(CuL)2 H2O]n;Crystal one cellular construction of asymmetry, by two Cu (II) ion center, two asymmetric chiral ligand H2L L (II) ions and a H2O molecules are formed, the structure of L (II) ion It is as follows to make formula:
2. the preparation method of above-described chiral MOF composite catalysts, step are as follows:
By chiral ligand H2After L alkaline aqueous solution is blended with the aqueous solution of copper acetate-graphene oxide-surfactant, room Temperature stand 2-10 min centrifuge, water washing three times, be dried to obtain;Yield 70-75 %;
The chiral ligand H2L alkaline aqueous solution, it is by 0.185-0.205g parts H2L, add 10mL, mass fraction is The 0.20-0.30 % LiOH aqueous solution, dissolving are made;
The aqueous solution of the copper acetate-graphene oxide-surfactant, it is by 0.15-0.25 g CuAc2·H2O、9-11 ML water, the polyethylene glycol and 5-7 mg graphene oxides that 0.2-0.3 mL molecular weight is 6000, ultrasonic 5-10 min are made;
The chiral ligand H2L, preparation method are as follows:By 15 mmol ALANINEs and 18 mL, the water containing 0.84 g KOH Solution blending is pyrolyzed, and adds 16 mL, the ethanol solution containing 1.8 g salicylides, after 30 min are stirred at room temperature, ice bath is cooled to 0-5 DEG C, 9mL, the aqueous solution containing 0.69 g NaBH4 are added, after yellow disappears, is neutralized to the watery hydrochloric acid that mass fraction is 18% PH is 3.5-5.0, the filtering of obtained solid, wash three times with ethanol, then with volume ratio is 1:1 water and ethyl alcohol recrystallization, mistake Filter, dry and be made after being washed with cold ethanol;
The graphene oxide is bought in chemical reagent company, or is prepared as follows:
Concentrated sulfuric acid 120mL and phosphatase 11 3.3mL is blended, nitration mixture is made;By 1.0 g graphite and 6.0g KMnO4After blending, stirring Under, nitration mixture is added, heating water bath continues to stir 12h to 50 DEG C;Mixed liquor ice-water bath is cooled to room temperature, add 1.5mL, 30%H2O2The aqueous solution;Mixture is centrifuged and pours out supernatant, is precipitated, then successively with water, 30% hydrochloric acid, second Alcohol washs twice respectively, dries, and graphene oxide is made.
3. application of the above-described chiral MOF composite catalysts as electrochemical sensing detection enantiomer, step It is as follows:
(1)Prepare chiral MOF composites working sensor electrode
Polish in alumina powder, the basal electrode glassy carbon electrode surface of water and ethanol cleaning, the uL chiralitys MOF of drop coating 6 Composite solution, room temperature are dried, and the working sensor electrode of chiral MOF composites structure is made;
The chiral MOF composites solution, it is by 3 mg chirality MOF composites and 250 uL isopropanols, 720 uL water, 30 UL Nafion are blended ultrasonic 10-15min and are made;
(2)Prepare chiral MOF composites electrochemistry chiral sensor
By step(1)Obtained working electrode, reference electrode and electrode is connected on electrochemical workstation, chirality has been made MOF composite electrochemistry chiral sensors;
The reference electrode is saturated calomel electrode, is platinum electrode to electrode;
(3)Detect D- (+)-tryptophan and L- (-)-Tryptophan enantiomer
With pH 5.0,0.1 mol L-1PBS cushioning liquid, using step(2)Obtained chiral MOF composites electricity Chemical chiral sensor, using D- (+)-tryptophan and L- (-)-color ammonia of differential pulse voltammetry, respectively measure various concentrations The current value of sour standard liquid, draw the D- based on chiral MOF composites electrochemistry chiral sensor(+)- tryptophan and L- (-)- Tryptophan enantiomer working curve;The solution of testing sample is replaced into D-(+)- tryptophan or L-(-)- tryptophan standards are molten Liquid, carry out D- in sample(+)- tryptophan and L-(-)The detection of-tryptophane.
The chiral sensor is to D-(+)- tryptophan and L-(-)The detection range of-tryptophan solution is 0.1-1.0 × 10- 9g/mL。
The beneficial technique effect of the present invention:
(1)The preparation of the chiral MOF composites of the present invention, due to adding chiral ligand H in preparation process2L, induction MOF are answered Condensation material produces chiral;Due to having used the polyethylene glycol that molecular weight is 6000, chiral MOF crystal is in obtained composite The wide 80-110 nm in footpath nanometer rods, if the not effect of the surface-active, chiral MOF crystal footpath in obtained composite A width of 1-5um;And the preparation process one kettle way ambient operation, technique is simple, is easy to industrialize.
(2)The invention provides a kind of chiral MOF composite catalysts answering as electrochemical sensing detection enantiomer With the detection is simply to modify the solution of chiral MOF composites to be made in glassy carbon electrode surface, and preparation method is simple, easy Operation.Due to exposing more and different avtive spots in chiral MOF and graphene oxide composite material, chirality has been played MOF and graphene oxide synergy so that the chiral sensor prepared based on the composite, successfully detect D-(+)- color Propylhomoserin and L-(-)The content of-tryptophan solution chiral enantiomer, and with quick response, detection range is wide, high sensitivity, The features such as simple to operate, time saving.
Embodiment
With reference to embodiment, the invention will be further described, but protection scope of the present invention is not only limited to implement Example, the change that professionals in the field is made to technical solution of the present invention, all should belong in protection scope of the present invention.
A kind of preparation method of chiral MOF composite catalysts of embodiment 1
By chiral ligand H2After L alkaline aqueous solution is blended with the aqueous solution of copper acetate-graphene oxide-surfactant, room Temperature stand 2 min centrifuge, water washing three times, be dried to obtain;The % of yield 70;
The chiral ligand H2L alkaline aqueous solution, it is by 0.185g parts H2L, add 10mL, mass fraction is 0.20 % The LiOH aqueous solution, dissolving are made;
The aqueous solution of the copper acetate-graphene oxide-surfactant, it is by 0.15 g CuAc2·H2O, 9 mL water, 0.2 ML molecular weight is 6000 polyethylene glycol and 5 mg graphene oxides, and 5 min of ultrasound are made.
A kind of preparation method of chiral MOF composite catalysts of embodiment 2
By chiral ligand H2After L alkaline aqueous solution is blended with the aqueous solution of copper acetate-graphene oxide-surfactant, room Temperature stand 10 min centrifuge, water washing three times, be dried to obtain;The % of yield 75;
The chiral ligand H2L alkaline aqueous solution, it is by 0.205g parts H2L, add 10mL, mass fraction is 0.30 % The LiOH aqueous solution, dissolving are made;
The aqueous solution of the copper acetate-graphene oxide-surfactant, it is by 0.25 g CuAc2·H2O, 11 mL water, 0.3 mL molecular weight is 6000 polyethylene glycol and 7 mg graphene oxides, and 10 min of ultrasound are made.
A kind of preparation method of chiral MOF composite catalysts of embodiment 3
By chiral ligand H2After L alkaline aqueous solution is blended with the aqueous solution of copper acetate-graphene oxide-surfactant, room Temperature stand 6 min centrifuge, water washing three times, be dried to obtain;The % of yield 73;
The chiral ligand H2L alkaline aqueous solution, it is by 0.195 g parts H2L, add 10mL, mass fraction is 0.25 % The LiOH aqueous solution, dissolving are made;
The aqueous solution of the copper acetate-graphene oxide-surfactant, it is by 0.20 g CuAc2·H2O, 10 mL water, 0.25 mL molecular weight is 6000 polyethylene glycol and 6 mg graphene oxides, and 7 min of ultrasound are made.
Chiral MOF composite catalysts made from the embodiment 1-3 of embodiment 4., by nano-sheet graphene oxide Loaded chiral Metal-organic frame MOF crystal forms, and crystal is the wide 80-110 nm in footpath nanometer rods, and its chemical formula is [(CuL)2 H2O]n;Crystal one cellular construction of asymmetry, by two Cu (II) ion centers, two asymmetric chiral ligands H2L L (II) ions and a H2O molecules are formed, and the structural formula of L (II) ion is as follows:
The chiral ligand H that the embodiment 1-3 of embodiment 5. is used2L, preparation method are as follows:
15 mmol ALANINEs and 18 mL, the aqueous solution containing 0.84 g KOH are blended and are pyrolyzed, add 16 mL, containing 1.8 g The ethanol solution of salicylide, after 30 min are stirred at room temperature, ice bath is cooled to 0-5 DEG C, adds 9mL, the water containing 0.69 g NaBH4 Solution, after yellow disappears, it is 3.5-5.0 that the watery hydrochloric acid for being 18% with mass fraction, which is neutralized to pH, obtained solid filtering, is used Ethanol wash three times, then with volume ratio be 1:1 water and ethyl alcohol recrystallization, filtering, dry and be made after being washed with cold ethanol.
The graphene oxide that the embodiment 1-3 of embodiment 6. is used is bought in chemical reagent company, or is made as follows It is standby:
Concentrated sulfuric acid 120mL and phosphatase 11 3.3mL is blended, nitration mixture is made;By 1.0 g graphite and 6.0g KMnO4After blending, stirring Under, nitration mixture is added, heating water bath continues to stir 12h to 50 DEG C;Mixed liquor ice-water bath is cooled to room temperature, add 1.5mL, 30%H2O2The aqueous solution;Mixture is centrifuged and pours out supernatant, is precipitated, then successively with water, 30% hydrochloric acid, second Alcohol washs twice respectively, dries, and graphene oxide is made.
Chiral MOF composite catalysts prepared by the embodiment 1 of embodiment 7. are as electrochemical sensing detection enantiomer Using step is as follows:
(1)Prepare chiral MOF composites working sensor electrode
Polish in alumina powder, the basal electrode glassy carbon electrode surface of water and ethanol cleaning, the uL chiralitys MOF of drop coating 6 Composite solution, room temperature are dried, and the working sensor electrode of chiral MOF composites structure is made;
The chiral MOF composites solution, it is by 3 mg chirality MOF composites and 250 uL isopropanols, 720 uL water, 30 UL Nafion are blended ultrasonic 10-15min and are made;
(2)Prepare chiral MOF composites electrochemistry chiral sensor
By step(1)Obtained working electrode, reference electrode and electrode is connected on electrochemical workstation, chirality has been made MOF composite electrochemistry chiral sensors;
The reference electrode is saturated calomel electrode, is platinum electrode to electrode;
(3)Detect D- (+)-tryptophan and L- (-)-Tryptophan enantiomer
With pH 5.0,0.1 mol L-1PBS cushioning liquid, using step(2)Obtained chiral MOF composites electricity Chemical chiral sensor, using D- (+)-tryptophan and L- (-)-color ammonia of differential pulse voltammetry, respectively measure various concentrations The current value of sour standard liquid, draw the D- based on chiral MOF composites electrochemistry chiral sensor(+)- tryptophan and L- (-)- Tryptophan enantiomer working curve;The solution of testing sample is replaced into D-(+)- tryptophan or L-(-)- tryptophan standards are molten Liquid, carry out D- in sample(+)- tryptophan and L-(-)The detection of-tryptophane.
Chiral MOF composite catalysts in embodiment 7 are only replaced with implementation by the method for embodiment 8. with embodiment 7 Chiral MOF composite catalysts prepared by example 2.
Chiral MOF composite catalysts in embodiment 7 are only replaced with implementation by the method for embodiment 9. with embodiment 7 Chiral MOF composite catalysts prepared by example 3.
Chiral MOF composite catalysts prepared by the embodiment 7-9 of embodiment 10. detect mapping as electrochemical sensing The application of body, to D-(+)- tryptophan and L-(-)The detection range of-tryptophan solution is 0.1-1.0 × 10-9g/mL。

Claims (6)

1. a kind of chiral MOF composite catalysts, it is characterised in that the catalyst is graphene oxide-loaded by nano-sheet Chiral metal organic framework MOF crystal forms, and crystal is the wide 80-110 nm in footpath nanometer rods, and its chemical formula is [(CuL)2 H2O]n;Crystal one cellular construction of asymmetry, by two Cu (II) ion centers, two asymmetric chiral ligand H2L L (II) Ion and a H2O molecules are formed, and the structural formula of L (II) ion is as follows:
2. the preparation method of chiral MOF composite catalysts as claimed in claim 1, it is characterised in that by chiral ligand H2L alkaline aqueous solution is with after the aqueous solution blending of copper acetate-graphene oxide-surfactant, being stored at room temperature 2-10 min Centrifuge, water washing three times, be dried to obtain;Yield 70-75 %.
3. the preparation method of chiral MOF composite catalysts as claimed in claim 2, it is characterised in that the chirality is matched somebody with somebody Body H2L alkaline aqueous solution, it is by 0.185-0.205g parts H2L, add 10mL, mass fraction is 0.20-0.30 % LiOH The aqueous solution, dissolving are made.
4. the preparation method of chiral MOF composite catalysts as claimed in claim 2, it is characterised in that the acetic acid The aqueous solution of copper-graphene oxide-surfactant, it is by 0.15-0.25 g CuAc2·H2O, 9-11 mL water, 0.2-0.3 ML molecular weight is 6000 polyethylene glycol and 5-7 mg graphene oxides, and ultrasonic 5-10 min are made.
5. chiral MOF composite catalysts prepared by preparation method as claimed in claim 1 detect as electrochemical sensing The application of enantiomer.
6. electrochemical sensing as claimed in claim 6 detects enantiomer, it is characterised in that step is as follows:
(1)Prepare chiral MOF composites working sensor electrode
Polish in alumina powder, the basal electrode glassy carbon electrode surface of water and ethanol cleaning, the uL chiralitys MOF of drop coating 6 Composite solution, room temperature are dried, and the working sensor electrode of chiral MOF composites structure is made;
The chiral MOF composites solution, it is by 3 mg chirality MOF composites and 250 uL isopropanols, 720 uL water, 30 UL Nafion are blended ultrasonic 10-15min and are made;
(2)Prepare chiral MOF composites electrochemistry chiral sensor
By step(1)Obtained working electrode, reference electrode and electrode is connected on electrochemical workstation, chirality has been made MOF composite electrochemistry chiral sensors;
The reference electrode is saturated calomel electrode, is platinum electrode to electrode;
(3)Detect D- (+)-tryptophan and L- (-)-Tryptophan enantiomer
With pH 5.0,0.1 mol L-1PBS cushioning liquid, using step(2)Obtained chiral MOF composites electrification Chiral sensor is learned, using D- (+)-tryptophan and L- (-)-tryptophan of differential pulse voltammetry, respectively measure various concentrations The current value of standard liquid, draw the D- based on chiral MOF composites electrochemistry chiral sensor(+)- tryptophan and L- (-)- Tryptophan enantiomer working curve;The solution of testing sample is replaced into D-(+)- tryptophan or L-(-)- tryptophan standards are molten Liquid, carry out D- in sample(+)- tryptophan and L-(-)The detection of-tryptophane.
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CN108562627A (en) * 2018-04-09 2018-09-21 江南大学 A kind of electrochemical sensor based on chiral covalent organic framework compound
CN109265698A (en) * 2018-08-30 2019-01-25 济南大学 A kind of MOF/ carbon dots chiral hybrid material and its preparation method and application
CN109265700A (en) * 2018-10-18 2019-01-25 辽宁师范大学 Chiral supermolecule metal phosphonic acid salt crystal material, preparation method and application
CN109569533A (en) * 2018-10-26 2019-04-05 万华化学集团股份有限公司 A kind of polyurethane-graphite alkene chirality column material and preparation method thereof
CN111257388A (en) * 2020-02-19 2020-06-09 常州大学 Preparation method of chiral supramolecular gel modified electrode for electrochemical recognition of tryptophan enantiomer
CN111330646A (en) * 2020-03-12 2020-06-26 济南大学 Preparation method and application of high-molecular @ Cu-MOF composite chiral membrane catalyst
CN111398381A (en) * 2020-04-17 2020-07-10 济南大学 Electrochemical identification method for identifying non-electroactive amino acid enantiomer
CN112604659A (en) * 2020-11-27 2021-04-06 嘉兴哲夫埃特环保科技有限公司 Chiral ligand exchange type COF @ MOF/L composite material and preparation method thereof
CN114410296A (en) * 2022-03-15 2022-04-29 贵州医科大学 Preparation method and application of MOF composite material based on isoleucine derivative ligand

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CN108562627B (en) * 2018-04-09 2019-11-26 江南大学 A kind of electrochemical sensor based on chiral covalent organic framework compound
CN108562627A (en) * 2018-04-09 2018-09-21 江南大学 A kind of electrochemical sensor based on chiral covalent organic framework compound
CN109265698A (en) * 2018-08-30 2019-01-25 济南大学 A kind of MOF/ carbon dots chiral hybrid material and its preparation method and application
CN109265698B (en) * 2018-08-30 2021-03-23 济南大学 MOF/carbon dot chiral hybrid material and preparation method and application thereof
CN109265700B (en) * 2018-10-18 2021-06-11 辽宁师范大学 Chiral supermolecule metal phosphonate crystal material, preparation method and application
CN109265700A (en) * 2018-10-18 2019-01-25 辽宁师范大学 Chiral supermolecule metal phosphonic acid salt crystal material, preparation method and application
CN109569533A (en) * 2018-10-26 2019-04-05 万华化学集团股份有限公司 A kind of polyurethane-graphite alkene chirality column material and preparation method thereof
CN109569533B (en) * 2018-10-26 2021-07-23 万华化学集团股份有限公司 Polyurethane graphene chiral column material and preparation method thereof
CN111257388A (en) * 2020-02-19 2020-06-09 常州大学 Preparation method of chiral supramolecular gel modified electrode for electrochemical recognition of tryptophan enantiomer
CN111330646A (en) * 2020-03-12 2020-06-26 济南大学 Preparation method and application of high-molecular @ Cu-MOF composite chiral membrane catalyst
CN111398381A (en) * 2020-04-17 2020-07-10 济南大学 Electrochemical identification method for identifying non-electroactive amino acid enantiomer
CN112604659A (en) * 2020-11-27 2021-04-06 嘉兴哲夫埃特环保科技有限公司 Chiral ligand exchange type COF @ MOF/L composite material and preparation method thereof
CN112604659B (en) * 2020-11-27 2022-07-05 苏州优特创优新材料科技有限公司 Chiral ligand exchange type COF @ MOF/L composite material and preparation method thereof
CN114410296A (en) * 2022-03-15 2022-04-29 贵州医科大学 Preparation method and application of MOF composite material based on isoleucine derivative ligand
CN114410296B (en) * 2022-03-15 2023-08-22 贵州医科大学 Preparation method and application of MOF composite material based on isoleucine derivative ligand

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