CN108586741A - Fluorescence polyamic acid polymer, preparation method and its application in terms of fluorescence thorniness swashs response - Google Patents

Fluorescence polyamic acid polymer, preparation method and its application in terms of fluorescence thorniness swashs response Download PDF

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CN108586741A
CN108586741A CN201810329086.0A CN201810329086A CN108586741A CN 108586741 A CN108586741 A CN 108586741A CN 201810329086 A CN201810329086 A CN 201810329086A CN 108586741 A CN108586741 A CN 108586741A
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fluorescence
polymer
oligoanilines
polyamic acid
anilino
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CN108586741B (en
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晁单明
杨蒙
杨一蒙
闫莹
刘新才
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Jilin University
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Abstract

A kind of application using Oligoanilines and azobenzene group as fluorescence polyamic acid polymer, preparation method and the polymer of sensitive primitive in terms of fluorescence thorniness swashs response belongs to functional polymer material field.It is by anilino- diamine monomer, 9,9 bis- (4 aminophenyl) fluorenes, p-diaminoazobenzene, 1,2,4,5 cyclohexanetetracarboxylic acid dianhydrides are added in reaction vessel, add solvent dimethylacetylamide, then magnetic agitation polymerized at room temperature reacts 20~30 hours;Mixed liquor is poured into distilled water, precipitation is precipitated, is filtered, precipitation is washed with distilled water 3~5 times again, methanol washs 3~5 times, finally that product is 20~30 hours dry under the conditions of vacuum, 30~50 DEG C, to obtain anilino- azobenzene fluorescent polyamide acid polymer.Polymer is spin-coated on electro-conductive glass, fluorescent switch responsive status of its film under external pH value, voltage, chemistry/reductant-oxidant and UV, visible light light stimulus is tested.

Description

Fluorescence polyamic acid polymer, preparation method and its fluorescence thorniness swash responder The application in face
Technical field
The invention belongs to functional polymer material fields, and in particular to a kind of novel with Oligoanilines and azobenzene group As the fluorescence polyamic acid polymer of sensitive primitive, preparation method and the polymer answering in terms of fluorescence thorniness swashs response With.
Background technology
It is manufactured from display, sensor to medical diagnosis and drug delivery and smart machine, fluorescent material is answered extensively In people’s lives.Compared to other fluorescent materials, polymerization species fluorescent material have it is light, be easy to MOLECULE DESIGN, The advantages that processing performance is excellent.With the fast development of material science, more stringent requirements are proposed to material by people, such as good Stability, special response etc..Therefore, researchers begin one's study recently external environment variation (such as light, electricity, pH value, pressure Power, heat, magnetic field and chemicals) action principle and rule that the photoluminescent property of fluorescent polymer is had an impact, to prepare The more stimuli responsive fluorescent materials for going out can adapt to extraneous complex environment, further widen the application range of material.
A kind of effective method for obtaining more stimulating responsive fluorescent polymers is that fluorogen and a variety of sensitive groups is same When be introduced into polymer, pass through sensitive group to extraneous environmental change response change and fluorophor between energy transfer Channel responds phenomenon to realize that fluorescent switch occurs for polymer.Model compound of the Oligoanilines as polyaniline has good Good dissolubility, programmable molecular structure, tunable electro-optical characteristic, while to pH value, redox materials and current potential Equal stimulations can respond.Azobenzene group will produce turn between unique Cis-trans structures under the light-wave irradiation of appropriate wavelength It changes, they is introduced into fluorescent polymer molecule segment simultaneously, it can interact with environmental stimuli changes self structure shape State makes fluorescent polymer that reversible fluorescent switch respondent behavior occur to drive the change of various molecular conformations.
The present invention is from the angle of MOLECULE DESIGN, and by anilino- diamine monomer, p-diaminoazobenzene and 9,9- is bis- (4- aminophenyls) fluorenes and 1, fluorescent polyamide acid is made in 2,4,5- cyclohexanetetracarboxylic acid, two anhydride reactant, by Oligoanilines and azo Phenyl group synthesizes the fluorescent polyamide acid of more stimuli responsives by MOLECULE DESIGN as sensitive primitive, outer to obtain more adaptation The fluorescence response proximate matter material of boundary's environmental change.
Fluorescent polymer prepared by the present invention is using Oligoanilines and azobenzene group as sensitivity primitive, high-luminous-efficiency Fluorophor as fluorescent emission primitive, utilize the electronics between sensitive primitive and fluorescent emission primitive/energy transfer to realize The switch of polymer fluorescent property changes, and synthesizes high-performance fluorescence response polymer by MOLECULE DESIGN.
Invention content
The object of the present invention is to provide a kind of novel using Oligoanilines and azobenzene group as the fluorescence of sensitive primitive Property polyamic acid polymer, preparation method and the polymer fluorescence thorniness swash response in terms of application.
The present invention is that (contents such as synthesis, characterization of the monomer refer to Chinese special using anilino- diamine monomer (M) first Profit:201410010359.7, side chain type electroactive polyurea polymer, preparation method and its application in terms of anti-corrosion) and 1,2, Bis- (4- aminophenyls) fluorenes (N) of 4,5- cyclohexanetetracarboxylic acids dianhydride, 9,9- and p-diaminoazobenzene (Q) (are conventional original Material, can be commercially available) combined polymerization obtains anilino- azobenzene fluorescent polyamide acid polymer.
Anilino- diamine monomer (M) structural formula is as follows:
9,9- bis- (4- aminophenyls) fluorenes (N) structural formula is as follows:
P-diaminoazobenzene (Q) structural formula is as follows:
1,2,4,5- cyclohexanetetracarboxylic acids dianhydride (R) structural formula is as follows:
The preparation method of anilino- azobenzene fluorescent polyamide acid polymer of the present invention, the following institute of reaction process Show:
The preparation method of anilino- azobenzene fluorescent polyamide acid polymer of the present invention, it is characterised in that:It will be anti- After answering monomer to grind, be placed under vacuum 30~50 DEG C it is 20-30 hours dry;After being completely dried by molar ratio be 1:2:1:4 benzene Bis- (4- aminophenyls) fluorenes (N) of amido diamine monomer (M), 9,9-, p-diaminoazobenzene (Q), 1,2,4,5- hexamethylene tetramethyls Acid dianhydride (R) is added in reaction vessel, adds solvent dimethylacetylamide, dimethylacetylamide dosage is to ensure reactant Solid content is 15~20g/100mL in system;Monomer is set fully to dissolve under nitrogen protection, after monomer is completely dissolved, then magnetic force Stir room temperature polymerisation 20~30 hours;After the completion of polymerisation, mixed liquor is poured into distilled water, precipitation is precipitated, is filtered, Precipitation is washed with distilled water 3~5 times again, methanol washs 3~5 times, finally that product is dry under the conditions of vacuum, 30~50 DEG C 20~30 hours, to obtain anilino- azobenzene fluorescent polyamide acid polymer P1 of the present invention, yield is 85~ 90%.
Working electrode used is tested in the present invention using tin indium oxide (ITO) glass as substrate, and ITO substrate is cut into It, is cleaned by ultrasonic 2~4 times by the size of 1.2cm × 5.5cm respectively in dichloromethane, acetone, absolute ethyl alcohol, distilled water, most It uses absolute ethyl alcohol ultrasound again afterwards 1~2 time, is put into baking oven to dry tack free cleaning;It is again that the anilino- prepared by the present invention is even Pyridine fluorescent polyamide acid polymer P1 is dissolved in N, N '-dimethyl acetamide, with fluorophor (9,9- bis- (4- aminophenyls) Fluorenes) a concentration of standard, be configured to solution (0.01~0.05g/mL), be then spin coated onto in above-mentioned processed ITO substrate, revolve Selected rotating speed is followed successively by 1200r/s 15s, 900r/s 60s when painting;Polymer after spin coating/ITO substrate is dried, from And polyamic acid/ITO samples are obtained, polymer is always solid film state in test process.
Description of the drawings
Fig. 1:The nuclear magnetic spectrogram for the polyamic acid polymer that the present invention synthesizes;
Fig. 2:The infrared spectrum for the polyamic acid polymer that the present invention synthesizes;
Fig. 3:The cyclic voltammetry curve spectrogram for the polyamic acid polymer that the present invention synthesizes;
Fig. 4:Oligoanilines state change map in the polyamic acid polymer structure that the present invention synthesizes;
Fig. 5:The fluorescence electroresponse curve spectrogram for the polyamic acid polymer that the present invention synthesizes;
Fig. 6:The polyamic acid polymer fluorescent pH response curve spectrogram that the present invention synthesizes;
Fig. 7:The polyamic acid polymer fluorescence chemical hydrogen reduction response curve spectrogram that the present invention synthesizes;
Fig. 8:The fluorescence photoresponse curve spectrogram for the polyamic acid polymer that the present invention synthesizes;
Fig. 1,2 are synthesized polymer nuclear-magnetism and infrared spectrum, characterization1H NMR(d6- DMSO) ownership:δ=10.29, 10.00 (s ,-CO-NH-), δ=8.11 (d ,-NH-), δ=7.75-6.63 (m, Ar-H).In 3420cm-1Place, which is that N-H is flexible, to shake Dynamic peak;2985cm-1Place is C-H vibration absorption peaks;1660cm-1Place is the vibration absorption peak of C=O bond;1513cm-1With 1453cm-1Place is the vibration absorption peak of carbon-carbon bond on phenyl ring;1453cm-1Itrogen-to-nitrogen bonds vibration absorption peak, 1314cm-1Carbonnitrogen bond shakes Dynamic absorption peak, 1229cm-1C-O-C stretching vibration peaks, 868cm-1、753cm-1、596cm-1For the deformation vibration of fingerprint region on phenyl ring Absorption peak.
Fig. 3 is polymer circulation volt-ampere curve, dissolves a polymer in dimethylacetamide solution, is configured to 0.05g/mL Solution, be spin-coated in the ITO substrate that cleaned, size is 1.2cm × 5.5cm and be used as working electrode, then be with platinum filament To electrode, Ag/AgCl is reference electrode, and formation three-electrode system does electrolyte with 1.0M HCl solutions and tested.It is working Electrode applies in 0.0V~1.0V voltage courses, shows two pairs of reversible redox peaks.Respectively 0.40V/0.36V and 0.53V/0.49V.Wherein, first pair of redox peaks corresponds to electrochemistry mistake of the Oligoanilines from reduction-state to intermediate oxidation state Journey, second pair of redox peaks correspond to electrochemical process of the Oligoanilines from intermediate oxidation state to highest oxidation state.Oligoanilines It is different in different state of oxidation lower structures.Meanwhile Oligoanilines also show under same state of oxidation difference acid or alkali environment Go out different structure changes.
Fig. 4 is the schematic diagram that Oligoanilines change in the different states of oxidation and acid or alkali environment lower structure.Oligoanilines pass through The increase of degree of oxidation is gradated by the LEB states originated and eventually becomes PNB states for EB states.With oxidation after acid doping The increase of degree is gradated by the LES states originated and eventually becomes PNS states for ES states.
Fig. 5 is polymer fluorescent electroresponse curve spectrogram, still uses three-electrode system, working electrode is applied respectively The constant voltage of 0.0V, 0.2V, 0.4V to 1.0V, each application time are 300s, and fluorescence light is carried out to polymer after applying voltage Spectrum test.Using 315nm as the fluorescence emission spectrum of excitation wavelength polymer, transmitting position is at 485nm, the fluorescence of polymer when 0.0V Maximum intensity, at this time the Oligoanilines in polymer be in reducing condition, continue to increase Oligoanilines constantly quilt with voltage Oxidation, fluorescence intensity also decline therewith, and Oligoanilines are to be oxidized to highest oxidation state, polymer after application voltage reaches 1.0V Fluorescence is reduced to the 20% of initial fluorescence intensity, and voltage reduces fluorescence intensity and is consequently increased the reversible automatically controlled fluorescence phenomenon of appearance
Fig. 6 is polymer fluorescent pH response curve spectrograms, applies the permanent electricity of 300s in 1.0M HCl solutions to P1/ITO films Pressure, the voltage of application is respectively 0.0V, 0.45V and 1.0V.According to cyclic voltammetry curve it is found that polymer is respectively at reduction State, intermediate oxidation state and highest oxidation state, and measure the fluorescence spectrum of P1/ITO.Polymer film fluorescence is strong under 0.45V voltages Degree is reduced to 57% of fluorescence intensity under starting 0.0V voltages, and it is the 20% of starting to apply fluorescence intensity after voltage becomes 1.0V.
Fig. 7 is polymer chemistry hydrogen reduction response curve spectrogram, and P1 films are placed in 1.0M HCl solutions, P1/ITO displayings Go out the higher launching curve of fluorescence intensity.Ammonium persulfate is added, ammonium persulfate concentrations is made in solution to be 4.0M, aniline in polymer Segment is gradually aoxidized is changed into PNS by LES, and fluorescence intensity is also gradually reduced.It is dipped in 1.0M NH again4In OH solution, benzene Amine segment is changed into PNB states by PNS, and fluorescence intensity declines again.Backward alkaline solution in hydrazine hydrate is added, make its solubility For 4.0M.After reducing agent is added, Oligoanilines are reduced, and are changed into LEB by PNB, fluorescence intensity is also risen.Finally by this P1/ITO is put into 1.0M HCl solutions, and Oligoanilines revert to LES states originally, and fluorescence intensity level also restores as before.
Fig. 8 is polymer fluorescent photoresponse curve spectrogram, similar to method mentioned above, to P1/ITO films in 1.0M Apply 300s constant voltages in HCl solution, the voltage of application is respectively 0.0V (Oligoanilines are in LES states), 0.45V (aniline Segment is in ES states) and 1.0V (Oligoanilines are in PNS states).Under the conditions of Oligoanilines state is fixed, only change Uv and visible light observes the change in fluorescence of polymer to the irradiation time of film.It is (under LES states) to apply 0.0V voltages Example, solid film fluorescence intensity under ultraviolet irradiation are gradually reduced, and irradiation falls to the 84% of starting after 30 minutes.Then will Solid film placement is irradiated under visible light, and fluorescence intensity substantially returns to original state after 200min.
Specific implementation mode
Embodiment 1
First all monomers are ground, are placed under the conditions of 40 DEG C of vacuum 24 hours dry.By 0.1369g (0.2mmol) aniline Base diamine monomer (M), 0.0425g (0.2mmol) p-diaminoazobenzene (Q), bis- (the 4- amino of 0.1394g (0.4mmol) 9,9- Phenyl) fluorenes (N), 1,2,4,5- cyclohexanetetracarboxylic acid dianhydrides (R) of 0.1793g (0.8mmol) are added in 50mL three-neck flasks.Again 5mL dimethylacetylamides are added, are allowed to fully dissolve under nitrogen protection, after being completely dissolved, magnetic agitation room temperature reaction 24 is small When.After the completion of polymerisation, mixed liquor is poured into distilled water, precipitation is precipitated, is filtered.Precipitation is washed with distilled water 3 times again, Methanol washs 3 times, and product is put into the drying 24 hours of 40 DEG C of vacuum drying oven, obtains the polymerization of anilino- azobenzene fluorescent polyamide acid Object P1, yield 86%.

Claims (3)

1. a kind of using Oligoanilines and azobenzene group as the fluorescence polyamic acid polymer of sensitive primitive, structural formula is such as Shown in lower:
2. a kind of fluorescence polyamic acid using Oligoanilines and azobenzene group as sensitive primitive described in claim 1 is poly- Close the preparation method of object, it is characterised in that:After reaction monomers are ground, be placed under vacuum 30~50 DEG C it is 20-30 hours dry;It is complete After white drying by molar ratio be 1:2:1:4 anilino- diamine monomer, bis- (4- aminophenyls) fluorenes of 9,9-, p-diaminoazobenzene With 1,2,4,5- cyclohexanetetracarboxylic acid dianhydrides are added in reaction vessel, add solvent dimethylacetylamide, dimethylacetamide Amine dosage is to ensure that solid content is 15~20% in reaction system;So that monomer is fully dissolved under nitrogen protection, waits for that monomer is complete After dissolving, then magnetic agitation polymerized at room temperature reacts 20~30 hours;After the completion of polymerisation, mixed liquor is poured into distilled water, Precipitation is precipitated, filters, then precipitation is washed with distilled water 3~5 times, methanol washs 3~5 times, finally by product vacuum, 30~ It is 20~30 hours dry under the conditions of 50 DEG C, to obtain anilino- azobenzene fluorescent polyamide acid polymer P1;
Wherein, the structural formula of anilino- diamine monomer is as follows,
The structural formula of 9,9- bis- (4- aminophenyls) fluorenes is as follows,
The structural formula of p-diaminoazobenzene is as follows,
The structural formula of 1,2,4,5- cyclohexanetetracarboxylic acid dianhydride is as follows,
3. a kind of fluorescence polyamic acid using Oligoanilines and azobenzene group as sensitive primitive described in claim 1 is poly- Close application of the object in terms of fluorescence thorniness swashs response.
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CN114516860A (en) * 2022-02-24 2022-05-20 南京大学 Amide-containing polysubstituted aromatic diamine monomer and preparation method thereof

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WO2020232777A1 (en) * 2019-05-21 2020-11-26 武汉华星光电半导体显示技术有限公司 Electrochromic polyamic acid material, preparation method therefor, and display device
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WO2020238029A1 (en) * 2019-05-27 2020-12-03 武汉华星光电半导体显示技术有限公司 Modified polyamide acid and preparation method therefor, and preparation method for composite film layer
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CN110437096A (en) * 2019-07-29 2019-11-12 安阳工学院 The preparation method of 2,6- bis- (amino-benzene oxygen)-N- (2- aminofluorene) benzamide monomer
CN110437095A (en) * 2019-07-29 2019-11-12 安阳工学院 2- (3- amino-benzene oxygen) -6- (4- amino-benzene oxygen)-N- (2- aminofluorene) benzamide monomer
CN110483328A (en) * 2019-07-29 2019-11-22 安阳工学院 2,6- bis- (amino-benzene oxygen)-N- [4- (phenylazo) phenyl] benzamide monomer and preparation method
CN110437096B (en) * 2019-07-29 2022-05-06 安阳工学院 Preparation method of 2, 6-di (aminophenoxy) -N- (2-aminofluorene) benzamide monomer
CN110483328B (en) * 2019-07-29 2022-06-17 安阳工学院 2, 6-di (aminophenoxy) -N- [4- (phenylazo) phenyl ] benzamide monomer and preparation method thereof
CN113004519A (en) * 2021-03-08 2021-06-22 吉林大学 Aggregation-induced luminescence electro-active polyamic acid polymer, nanofiber detection test strip and application thereof
CN114516860A (en) * 2022-02-24 2022-05-20 南京大学 Amide-containing polysubstituted aromatic diamine monomer and preparation method thereof
CN114516860B (en) * 2022-02-24 2023-10-13 南京大学 Multi-substituted aromatic diamine monomer containing amide and preparation method thereof

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