CN106854252A - The design synthesis of one class new bipolar polymer host material and its performance study - Google Patents

The design synthesis of one class new bipolar polymer host material and its performance study Download PDF

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CN106854252A
CN106854252A CN201710012237.5A CN201710012237A CN106854252A CN 106854252 A CN106854252 A CN 106854252A CN 201710012237 A CN201710012237 A CN 201710012237A CN 106854252 A CN106854252 A CN 106854252A
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carbazole
monomers
nitrogen
reaction
dried
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殷成蓉
徐亚超
李璐
王超
黄维
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Nanjing Tech University
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    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F130/00Homopolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing phosphorus, selenium, tellurium or a metal
    • C08F130/02Homopolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing phosphorus, selenium, tellurium or a metal containing phosphorus
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F126/00Homopolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen
    • C08F126/06Homopolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen by a heterocyclic ring containing nitrogen
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F226/00Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen
    • C08F226/06Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen by a heterocyclic ring containing nitrogen
    • C08F226/12N-Vinylcarbazole
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F230/00Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing phosphorus, selenium, tellurium or a metal
    • C08F230/02Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing phosphorus, selenium, tellurium or a metal containing phosphorus
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K85/00Organic materials used in the body or electrodes of devices covered by this subclass
    • H10K85/10Organic polymers or oligomers
    • H10K85/111Organic polymers or oligomers comprising aromatic, heteroaromatic, or aryl chains, e.g. polyaniline, polyphenylene or polyphenylene vinylene

Abstract

The invention belongs to organic optoelectronic material technical field, and in particular to a class is based on design synthesis and its performance study of the new bipolar polymer host material of carbazole.The material is, using PVK as molecular skeleton, the mobility of hole and electronics to be balanced by introducing electron withdraw group, and using the material in organic light emitting diode device field, obtains efficient device performance.

Description

The design synthesis of one class new bipolar polymer host material and its performance study
Technical field
The invention belongs to organic photoelectrical material technical field.A specifically related to class new bipolar polymer host material Design synthesis and its performance study, can be applied to organic light emission using such material as material of main part and the doping of object phosphor material The organic electronic such as diode field.
Background technology
Organic electro phosphorescent device (PHOLEDs) exists due to introducing heavy metal complex illuminator between heavy metal Spin-spin interaction interaction, singlet and triplet excitons can be simultaneously captured, nearly 100% can be obtained in theory Internal quantum efficiency, have potential application value on extensive device and flexible device.Heavy metal in PHOLEDs is matched somebody with somebody Compound phosphor material separately as luminescent layer, but generally can not be entrained in suitable material of main part, forms Subjective and Objective Luminescence system, to weaken the excessive quenching effect for causing of metal complex concentration and triplet state-triplet state (T1-T1) bury in oblivion effect, So as to improve the efficiency of device.Therefore the material of main part of design synthesized high-performance is also particularly important for PHOLEDs.Small point Using complicated evaporation coating technique in preparation process, cumbersome preparation process and the cost of costliness are greatly limited sub- PHOLEDs The further development and commercialization of product;And electrostrictive polymer phosphorescent device (PPLEDs) then uses simple in preparation process The methods such as the solution processing method of low cost, such as spin coating and inkjet printing, are conducive to the manufacture that large area flexible shows.Therefore, Develop the polymer host material of function admirable for PPLEDs, be the crucial problem of a comparing.
PVK (PVK) as a quasi-representative, better performances non-co- yoke type polymer, due to containing higher ETThe cavity transmission ability become reconciled, is applied in PPLEDs by wide coverage as material of main part.According to So etc., it is based on The energy efficiency and luminous efficiency of the double-layer blue light PhPLEDs of PVK and FIrpic can reach 14lm/W and 22cd/A.But The electronic transmission performance and thermal stability of PVK are not highly desirable, and high-performance, longevity are being prepared as polymer host material There is certain limitation on the PPLEDs of life;And the report of the polymer host material of related non-conjugated class formation is still little. The stronger functional group of electron-withdrawing power is introduced into PVK, the transmittability for obtaining electronics and hole is piled up compared with the bipolarity of balance Polymer host material, can obtain more preferable progress in blue phosphorescent PPLEDs directions.Still be necessary to enter in this field The more thoroughgoing and painstaking research work of row.In view of this, we intend by the method for functionalization, by some have special steric hindrance, The electrophilic functional group of electronic structure is incorporated into model accumulation polymer, design synthesis a series of new bipolarity heap accumulation Compound material of main part.Primary study difference electron withdraw group piles up the E of polymer to modelT, thermodynamic stability, electric charge transmission The regulation and control of performance, photophysical property and electrochemical properties.Inquire into bipolarity and pile up the molecular structure of polymer, photoelectric property, thin Relation between film pattern and device performance.On this basis, a series of high performance polymer material of main parts are filtered out, is hair Exhibition blueness PPLEDs provides the support of principle and material.On the basis of optimization of material, with reference to device optimization process, device is studied In basic physical mechanism, the inherent operation principle of device is disclosed, so as to instruct the design of new device with application.Please join in detail Document (1) Shiyang Shao, Junqiao Ding, Tengling Ye, Zhiyuan Xie, Lixiang Wang are read, Xiabin Jing, and Fosong Wang Adv.Mater.2011,23,3570-3574. documents (2) Ho-Hsiu Chou, Chien-Hong Cheng Adv.Mater.2010,22,2468-2471. documents (3) Mounggon Kim, Jun Yeob Lee Adv.Funct.Mater.2014,24,4164-4169.
The content of the invention
It is an object of the invention to pass through to be introduced toward on the carbazole avtive spot of the PVK (PVK) of non-co- yoke type The electrophilic functional group of different structure builds new bipolar polymer host material, using the material in organic light emission The application in diode component field obtains efficient device performance.
New bipolar polymer host material in the present invention, its design feature is mainly the polyethylene toward non-co- yoke type The electrophilic functional group of different structure is introduced on the carbazole avtive spot of base carbazole (PVK).Its structural features are as follows:
Wherein:R is electron withdraw group, and the connection site of R is its of 1,2,3 and No. 4 positions of carbazole unit in compound I and II One of;X, y and n are Any Digit in 1~1000.
R is specially the one kind in having structure:
The preparation method of heretofore described new bipolar polymer host material, the VCz replaced by R Monomer carries out radically homo or copolyreaction is prepared, specific as follows:
Wherein, x, y and n are Any Digit in 1~1000.
Raolical polymerizable is under the conditions of 85 DEG C of temperature, with azodiisobutyronitrile AIBN as catalyst, to R substitutions Vinylcabazole monomers carry out polymerisation.The reaction bulb used in experiment need to soak and clean in potassium bichromate washing lotion, connect The salt deposit that inwall is removed with the water vapour of saturation, is finally toasted in flame and is protected cooling with nitrogen, reach removing absorption The purpose of the oxygen in bottle wall.Under nitrogen protection, prepare R substitution vinylcabazole monomers or configuration VCz and The mixture concentration of the vinylcabazole monomers of R substitutions is 0.1~1.0mol/L, and AIBN concentration is 1.0~10.0 × 10-3mol/ The toluene or tetrahydrofuran solution of L, drum nitrogen are stirred evenly.Above-mentioned configuration solution is separately added into reaction bulb, liquid nitrogen cooling takes out true Sky, thawed inflated with nitrogen again, and then envelope bottle is inserted in 85 DEG C of oil bath pans of constant temperature, and reaction 72h is quenched reaction after terminating using methyl alcohol, so Methyl alcohol sedimentation afterwards obtains polymer crude product, and crude product acetone extraction obtains polymeric material.
The preparation method of heretofore described class new polymers bipolar host material, it is characterised in that the R takes The vinylcabazole monomers in generation are that the carbazole monomers replaced by R are prepared respectively through nucleophilic displacement of fluorine and elimination reaction, R substitutions Carbazole monomers can by bromo carbazole be raw material by two kinds difference routes prepare, it is specific as follows:
Step a by bromo carbazole and R-H, palladium, 1, after 1 '-bis- Diphenyl phosphino ferrocenes (dppf), triethylamine mixing After adding dmso solution, the back flow reaction 12h under lucifuge and nitrogen guard mode.Reaction is extracted after terminating with dichloromethane Take out organic phase.Organic phase is dried using anhydrous magnesium sulfate, organic solution is rotated after filtering, obtained using column chromatography for separation method The carbazole monomers of R substitutions;
Step a ' by raw material bromo carbazole and connection boric acid pinacol ester, palladium, 1, double (diphenylphosphine) ferrocene of 1- and Potassium acetate is added in dry dimethyl sulfoxide (DMSO), under the protection of nitrogen, 90 DEG C is heated to while stirring, reacts 12h, is stood afterwards Room temperature is cooled to, is extracted with water and dichloromethane, then dried with anhydrous magnesium sulfate, filtering, and remove organic solvent, obtain whole product Thing crude product;And post purifying is crossed, obtain the borate of carbazole;
Step b ' by the borate of carbazole and R-X (X is halogen) and tetrakis triphenylphosphine palladium be added to toluene, ethanol and In the mixed solution of 2M wet chemicals, under the protection of nitrogen, side stirring change is heated to 90 DEG C, reacts 12h, stands afterwards cold But to room temperature, extracted with water and dichloromethane, then dried with anhydrous magnesium sulfate, filtering, and remove organic solvent, obtain product thick Product;And post purifying is crossed, obtain the carbazole monomers of R substitutions;
The carbazole monomers that step c replaces above-mentioned R are added to 1,2- with potassium carbonate, potassium hydroxide and TBAB In dichloroethanes, 5h is reacted under the conditions of 50 DEG C, stand be cooled to room temperature afterwards, extracted with water and dichloromethane, then use anhydrous sulphur Sour magnesium is dried, filtering, and removes organic solvent, obtains product crude product;And post purifying is crossed, obtain the chloroethyl carbazole list of R substitutions Body;
The chloroethyl carbazole monomers that step d replaces R obtained above are added to isopropyl with potassium hydroxide, hydroquinones In the mixed solution of alcohol and toluene, 3h is reacted under the conditions of 85 DEG C, stand be cooled to room temperature afterwards, solvent is spin-dried for, with water and dichloro Methane is extracted, then is dried with anhydrous magnesium sulfate, filtering, and removes organic solvent, obtains product crude product;And post purifying is crossed, obtain Final monomer.
The application of heretofore described new bipolar polymer host material, it is characterised in that the material and phosphorescent guest It is applied in organic electroluminescence device as luminescent layer after luminescent material doping.Structure in organic electro phosphorescent device is: Transparent anode/hole transmission layer/polymer host material and phosphorescent guest luminescent material/electron transfer layer/metallic cathode, light Compound of the material of main part of layer as described in right 1, guest materials is metal complex phosphor material.
Beneficial effects of the present invention are:
(1) design, synthesis and its application the invention provides a class new bipolar polymer host material, possess conjunction Suitable triplet and the charge transport ability of balance, for the preparation of high-efficiency polymer electro phosphorescent device provides condition;
(2) Bipolar Polymer material of main part synthetic method of the present invention is simple, is suitable for extensive use;
(3) Bipolar Polymer material of main part of the present invention, with good thermodynamic stability and film forming;
(4) Bipolar Polymer material of main part of the present invention, can effectively be mixed with phosphorescent guest material material It is miscellaneous, luminescent device is prepared using solution spin-coating method, be conducive to the manufacture that large area flexible shows.
Brief description of the drawings
Accompanying drawing is used for providing a further understanding of the present invention, and constitutes a part for specification, with example of the invention It is used to explain the present invention together, is not construed as limiting the invention.Preferred embodiment is in the accompanying drawings in embodiment.
Ultraviolet-ray visible absorbing and the fluorescent spectroscopic properties contrast of Fig. 1 polymer P VPOK, PVPOK-1 and PVPOK-2 films Figure;
The antenna effect spectrum comparison diagram of Fig. 2 polymer Ps VPOK, PVPOK-1 and PVPOK-2;
The cyclic voltammetry curve figure of Fig. 3 polymer Ps VK and PVPOK-1, PVPOK-2 and PVPOK;
The TGA curves and DSC curve figure of Fig. 4 polymer Ps VPOK;
Fig. 5 electro phosphorescent device structure charts;
The electroluminescent light spectrogram of Fig. 6 polymer Ps VK and PVPOK-1, PVPOK-2 device;
Fig. 7 polymer Ps VK and PVPOK-1, PVPOK-2 blue phosphorescent device property figure.
Specific embodiment
The present invention is further described below by specific embodiment, but the invention is not limited in these embodiments.
The synthesis of the PVPOK of example 1;
The synthesis of intermediate (2):By compound 2 (1.83g, 7.4mmol) and diphenyl phosphorus oxygen (1g, 4.5mmol), acetic acid Palladium (0.056g, 0.25mmol), 1,1 '-bis- Diphenyl phosphino ferrocenes (dppf) (0.25g, 0.45mmol), triethylamine (0.8mL, After dimethyl sulfoxide (DMSO) (15mL) dissolving is added after 5.9mmol) mixing, the back flow reaction 12h under lucifuge and nitrogen guard mode.Instead After should terminating organic phase is extracted with dichloromethane.Organic phase is dried using anhydrous magnesium sulfate, organic solution is rotated after filtering, Product Compound 2 is obtained using column chromatography for separation method.
The synthesis of intermediate (3):At 50 DEG C, by compound 2 (3.67g, 10mmol), potassium hydroxide (2.25g, 40mol), potassium carbonate (13.82g, 100mmol), TBAB (0.32mg, 1mmol) is dissolved in 1,2- dichloroethanes 3~5h is reacted in (100mL) in single-necked flask.Reaction removes solid in solution after terminating, and is extracted using dichloromethane, anhydrous Magnesium sulfate dries organic phase, and method acquisition compound 4 is used column chromatography after being spin-dried for organic solvent.
The synthesis of intermediate (4):Compound 3 (4.3g, 10mmol) and potassium hydroxide (4.5g, 80mmol), hydroquinones (0.11g, 1mmol), toluene (10mL) and isopropanol (100mL) flow back 3h at 85 DEG C.Reaction is spin-dried for toluene and different after terminating Propyl alcohol, and extracted with dichloromethane, anhydrous magnesium sulfate is dried, filtering, and compound 4 is obtained using column chromatography for separation method after being spin-dried for.
The synthesis of final product PVPOK:Monomeric compound 4 (0.2g, 0.5mmol) is added to be dissolved in through metal in reaction tube Sodium is dried and in distilled tetrahydrofuran (1mL), and the vinyl polymerization initiator azo two for adding monomer weight ratio to be 1% is different Butyronitrile (2.0mg), is stirred at reflux 3 days at 85 DEG C.Reaction is quenched reaction after terminating using methyl alcohol, and then petroleum ether sedimentation is obtained Polymer crude product, crude product acetone extraction obtains polymeric material PVPOK.
The synthesis of the copolymer p VPOK-1 of example 2 and PVPOK-2;
The synthesis of polymer P VPOK-1 and PVPOK-2:Monomeric compound 5 (0.1g, 0.25mmol/ are added in reaction tube 0.2g, 0.5mmol) and 9- VCzs (0.196g, 1mmol/0.098g, 0.5mmol) with mol ratio be 8: 2 or 5: 5 Ratio mixes, and corresponds to add total monomer weight than the polymerization initiator azodiisobutyronitrile (2.96mg/ for 1% respectively 2.98mg), anhydrous and oxygen-free environment in reaction tube is kept, the tetrahydrofuran (2.5mL/2mL) by water removal deoxygenation treatment is added, is treated After in the complete solvent of monomer and solution, 60 DEG C of initiated polymerizations under the conditions of lucifuge.After the completion of polymerization triggers, system is placed in 85 Reacted 3 days at DEG C.Reaction is quenched reaction after terminating using methyl alcohol, and then petroleum ether sedimentation obtains polymer crude product, crude product With acetone extraction, obtain polymeric material and obtain copolymer p VPOK-1 and PVPOK-2.
The synthesis of example 3 PV (2-PO) K;
The synthesis of intermediate (2):By compound 2 (1.83g, 7.4mmol) and diphenyl phosphorus oxygen (1g, 4.5mmol), acetic acid Palladium (0.056g, 0.25mmol), 1,1 '-bis- Diphenyl phosphino ferrocenes (dppf) (0.25g, 0.45mmol), triethylamine (0.8mL, After dimethyl sulfoxide (DMSO) (15mL) dissolving is added after 5.9mmol) mixing, the back flow reaction 12h under lucifuge and nitrogen guard mode.Instead After should terminating organic phase is extracted with dichloromethane.Organic phase is dried using anhydrous magnesium sulfate, organic solution is rotated after filtering, Product Compound 2 is obtained using column chromatography for separation method.
The synthesis of intermediate (3):At 50 DEG C, by compound 2 (3.67g, 10mmol), potassium hydroxide (2.25g, 40mol), potassium carbonate (13.82g, 100mmol), TBAB (0.32mg, 1mmol) is dissolved in 1,2- dichloroethanes 3~5h is reacted in (100mL) in single-necked flask.Reaction removes solid in solution after terminating, and is extracted using dichloromethane, anhydrous Magnesium sulfate dries organic phase, and method acquisition compound 4 is used column chromatography after being spin-dried for organic solvent.
The synthesis of intermediate (4):Compound 3 (4.3g, 10mmol) and potassium hydroxide (4.5g, 80mmol), hydroquinones (0.11g, 1mmol), toluene (10mL) and isopropanol (100mL) flow back 3h at 85 DEG C.Reaction is spin-dried for toluene and different after terminating Propyl alcohol, and extracted with dichloromethane, anhydrous magnesium sulfate is dried, filtering, and compound 4 is obtained using column chromatography for separation method after being spin-dried for.
The synthesis of final product PV (2-PO) K:In reaction tube add monomeric compound 4 (0.2g, 0.5mmol) be dissolved in through Metallic sodium is dried and in distilled tetrahydrofuran (1mL), adds the vinyl polymerization initiator azo that monomer weight ratio is 1% Bis-isobutyronitrile (2.0mg), is stirred at reflux 3 days at 85 DEG C.Reaction is quenched reaction after terminating using methyl alcohol, then petroleum ether sedimentation Polymer crude product is obtained, crude product acetone extraction obtains polymeric material PV (2-PO) K.
The synthesis of the PVDPTK of embodiment 4;
The synthesis of intermediate (2):By 3- bromines carbazole (4.92g, 20mmol) and connection boric acid pinacol ester (6.6g, 26mmol), double (diphenylphosphine) ferrocene (0.66g, 1.2mmol) of palladium (0.134g, 0.6mmol), 1,1- and potassium acetate (5.88g, 60mmol) is added in dry dimethyl sulfoxide (DMSO), under the protection of nitrogen, 90 DEG C, reaction is heated to while stirring 12h, stands be cooled to room temperature afterwards, is extracted with dichloromethane, then is dried with anhydrous magnesium sulfate, and filtering is spin-dried for organic solvent, obtains Crude product;And post purifying is crossed, obtain intermediate product 5.
The synthesis of intermediate (3):By intermediate product 3 (0.586g, 2mmol), chloro- 4, the 6- diphenyl -1,3,5-triazines of 2- (0.536g, 2mmol) and tetrakis triphenylphosphine palladium (0,023g, 0.02mmol) are added to wet chemical (9mL), the first of 2M (18mL, v/v=2: in mixed solution 1), under the protection of nitrogen, react 12h, reaction knot to benzene/ethanol under the conditions of 110 DEG C Room temperature is cooled to after beam, is extracted with dichloromethane, then dried with anhydrous magnesium sulfate, filtering is spin-dried for organic solvent, is slightly produced Thing;And post purifying is crossed, obtain intermediate product 6.
The synthesis of intermediate (4):At 50 DEG C, by intermediate product 3 (0.398g, 1mmol), potassium hydroxide (0.225g, 4mmol), potassium carbonate (1.382g, 10mmol), TBAB (0.032g, 0.1mmol) is dissolved in 1,2- dichloroethanes 5h is reacted in single-necked flask in (10mL).Reaction removes solid in solution after terminating, dichloromethane extraction, anhydrous magnesium sulfate is done Dry organic phase, filtering after being spin-dried for organic solvent, uses column chromatography method and obtains intermediate product 7.
The synthesis of intermediate (5):By intermediate product 4 (4.61g, 10mmol) and potassium hydroxide (4.49g, 80mmol), right Benzenediol (0.11g, 1mmol), toluene (10mL) and isopropanol (100mL) flow back 3h at 85 DEG C.Reaction is spin-dried for first after terminating Benzene and isopropanol, and extracted with dichloromethane, anhydrous magnesium sulfate dries organic phase, filters, and after being spin-dried for organic solvent, uses column chromatography Partition method obtains monomer 8.
The synthesis of final product PVDPTK:Monomeric compound 5 (0.2g, 0.45mmol) is added to be dissolved in through gold in reaction tube Category sodium is dried and in distilled tetrahydrofuran (1mL), adds the vinyl polymerization initiator azo two that monomer weight ratio is 1% Isobutyronitrile (2.0mg), is stirred at reflux 3 days at 85 DEG C.Reaction is quenched reaction after terminating using methyl alcohol, and then methyl alcohol sedimentation is obtained Polymer crude product, crude product acetone extraction obtains polymeric material PVDPTK.
The measure of the polymeric material photophysical property of embodiment 5;
A ultraviolet-visible absorption spectroscopies:The toluene solution of prepared polymer in cuvette, concentration is about 1 × 10-5Mol/L, Inhaled using Shimadzu (Shimadzu) UV-1750 ultraviolet-visual spectrometers and Hitachi (Hitachi) F-4600 XRFs Receive spectrum and emission spectrometry.Wherein, the instrument that film preparation is used is the KW- of Chinese Academy of Sciences Microelectronics Institute's research and development 4A type spin coating instrument;
B fluorescence emission spectrums:The fluorescence emission spectrum (solution and film) of all material is tested in Hitachi F- 4600 spectrometers, test sample compound concentration is 1 × 10-5mol L-1Toluene solution, excitation wavelength be ultravioletvisible absorption light The maximum wavelength of spectrum.Wherein, the instrument that film preparation is used is the KW-4A type spin coatings of Chinese Academy of Sciences Microelectronics Institute's research and development Instrument;
C antenna effect emission spectrum:Antenna effect emission spectrum is tested in Hitachi F-4600 spectrometers, cold in liquid nitrogen But under the conditions of, material temperature reaches 77K, and material is configured into 1 × 10-5mol L-1Toluene solution test.
The measure of the polymeric material electrochemical properties of embodiment 6;
The electrochemical properties of polymer host material are determined with electrochemical cyclic voltammetry (CV), and laboratory apparatus is Occasion China CHI660E electrochemical workstations, the instrument uses three-electrode system, including glass carbon working electrode, Ag/AgCl references Electrode and platinum filament are to electrode.Polymer electrochemical determines the solvent for using and is generally dry acetonitrile, and electrolyte is hexafluoro phosphorus TBuA (Bu4NPF6), concentration is 0.1M;Test environment needs nitrogen to protect.The speed of instrument scanning is 0.1V/s, benchmark Thing is ferrocene (FOC), calculates HOMO the and LUMO energy of the material by measuring the beginning voltage of oxidation and reduction process respectively Level.
The measure of the polymeric material thermodynamic stability of embodiment 7;
Differential scanning (DSC) is tested:DSC collection of illustrative plates is tested in Shimadzu DSC-60A differential thermals view, in nitrogen protective condition Under, sample is heated to the state less than decomposition temperature with the speed of 10 DEG C/min first, then, lowers the temperature under the conditions of liquid nitrogen and returns to Initial temperature, for the second time again with the speed heating scan of 10 DEG C/min.
Thermogravimetric (TGA) is tested:TGA collection of illustrative plates is tested in Shimadzu DTG-60H Instruments, under nitrogen protective condition, is risen Warm speed is 10 DEG C/min, while the flow velocity of protection air-flow nitrogen is 20cm3/min, material weight changes until reaching perseverance Weight state.
The preparation of the electroluminescent blue phosphorescent device of the polymeric material of embodiment 8 and sign;
New bipolar electro-phosphorescent main body material of the invention is applied to luminescent layer, in organic electro phosphorescent device Structure is:Transparent anode/hole transmission layer/subject and object luminescent material/electron transfer layer/negative electrode, luminescent layer is by main body material Material and dopant material composition, the compound of the material of main part of luminescent layer as described in right 1, guest materials is metal complex phosphorescence Material.
The blue PhPLEDs device architectures prepared as material of main part are ITO/PEDOT:PSS(40nm)/Host:10- 15wt%FIrpic (100nm)/TPBI (20nm)/LiF (0.8nm)/Al (100nm).Wherein ITO is that square resistance is 10-20 The transparency electrode of Ω;PEDOT:PSS is poly- (3,4- ethylenedioxythiophene)/poly- (p styrene sulfonic acid) as hole transport material Material, Host:FIrpic is ((4, the 6- difluoros of iridium (III) two of Bipolar Polymer material of main part doping 10-15% in embodiment Benzene)-pyridine-N, C2′) picolinic acid ester, using solution spin coating technique, film thickness is 100nm;LiF cushions are deposited with again, most Afterwards, evaporating Al negative electrode.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art For, under the premise without departing from the principles of the invention, some improvement can also be made, these improvement are also considered as protection of the invention Scope.

Claims (4)

1. a class new bipolar polymer host material, its design feature is mainly the PVK toward non-co- yoke type (PVK) the electrophilic functional group of different structure is introduced on carbazole avtive spot.Its structural features are as follows:
Wherein:R is electron withdraw group, in compound I and II the connection site of R be 1,2,3 and No. 4 positions of carbazole unit wherein it One;X, y and n are Any Digit in 1~1000.
R is specially the one kind in having structure:
2. a kind of preparation method of class new bipolar polymer host material as claimed in claim 1, it is characterised in that By R replace vinylcabazole monomers carry out radically homo or mix with vinylcabazole monomers carry out it is free-radical polymerized Obtain, it is specific as follows:
Wherein, x, y and n are Any Digit in 1~1000.
Raolical polymerizable is under the conditions of 85 DEG C of temperature, with azodiisobutyronitrile AIBN as catalyst, to the ethene of R substitutions Base carbazole monomers carry out polymerisation.The reaction bulb used in experiment need to soak and clean in potassium bichromate washing lotion, then use The water vapour of saturation removes the salt deposit of inwall, is finally toasted in flame and protects cooling with nitrogen, reaches removing absorption in bottle The purpose of the oxygen on wall.Under nitrogen protection, the vinylcabazole monomers or configuration VCz and R for preparing R substitutions take The mixture concentration of the vinylcabazole monomers in generation is 0.1~1.0mol/L, and AIBN concentration is 1.0~10.0 × 10-3Mol/L's Toluene or tetrahydrofuran solution, drum nitrogen are stirred evenly.Above-mentioned configuration solution is separately added into reaction bulb, liquid nitrogen cooling is vacuumized, Thawed inflated with nitrogen again, and then envelope bottle is inserted in 85 DEG C of oil bath pans of constant temperature, and reaction 72h is quenched reaction after terminating using methyl alcohol, then Methyl alcohol sedimentation obtains polymer crude product, and crude product acetone extraction obtains polymeric material.
3. the preparation method of a class new polymers bipolar host material according to claim 2, it is characterised in that the R Substituted vinylcabazole monomers are that the carbazole monomers replaced by R are prepared respectively through nucleophilic displacement of fluorine and elimination reaction, and R takes The carbazole monomers in generation can be that raw material is prepared by two kinds of different routes by bromo carbazole, specific as follows:
Step a adds bromo carbazole and R-H, palladium, 1 after 1 '-bis- Diphenyl phosphino ferrocenes (dppf), triethylamine mixing After dmso solution, the back flow reaction 12h under lucifuge and nitrogen guard mode.Reaction is extracted after terminating with dichloromethane Organic phase.Organic phase is dried using anhydrous magnesium sulfate, organic solution is rotated after filtering, obtaining R using column chromatography for separation method takes The carbazole monomers in generation;
Step a ' by raw material bromo carbazole and connection boric acid pinacol ester, palladium, 1, double (diphenylphosphine) ferrocene of 1- and acetic acid Potassium is added in dry dimethyl sulfoxide (DMSO), under the protection of nitrogen, 90 DEG C is heated to while stirring, reacts 12h, and cooling is stood afterwards To room temperature, extracted with water and dichloromethane, then dried with anhydrous magnesium sulfate, filtering, and remove organic solvent, obtain end-product thick Product;And post purifying is crossed, obtain the borate of carbazole;
The borate of carbazole and R-X (X is halogen) and tetrakis triphenylphosphine palladium are added to toluene, ethanol and 2M carbon by step b ' In the mixed solution of sour aqueous solutions of potassium, under the protection of nitrogen, side stirring change is heated to 90 DEG C, reacts 12h, stands be cooled to afterwards Room temperature, is extracted with water and dichloromethane, then is dried with anhydrous magnesium sulfate, filtering, and removes organic solvent, obtains product crude product; And post purifying is crossed, obtain the carbazole monomers of R substitutions;
The carbazole monomers that step c replaces above-mentioned R are added to 1,2- dichloros with potassium carbonate, potassium hydroxide and TBAB In ethane, 5h is reacted under the conditions of 50 DEG C, stand be cooled to room temperature afterwards, extracted with water and dichloromethane, then use anhydrous magnesium sulfate Dry, filtering, and remove organic solvent, obtain product crude product;And post purifying is crossed, obtain the chloroethyl carbazole monomers of R substitutions;
Chloroethyl carbazole monomers that step d replaces R obtained above and potassium hydroxide, hydroquinones be added to isopropanol and In the mixed solution of toluene, 3h is reacted under the conditions of 85 DEG C, stand be cooled to room temperature afterwards, solvent is spin-dried for, with water and dichloromethane Extraction, then dried with anhydrous magnesium sulfate, filtering, and organic solvent is removed, obtain product crude product;And post purifying is crossed, obtain final Monomer.
4. a kind of application of new bipolar polymer host material as claimed in claim 1, it is characterised in that the material and phosphorus It is applied in organic electroluminescence device as luminescent layer after the doping of light guest emitting material.Knot in organic electro phosphorescent device Structure is:Transparent anode/hole transmission layer/polymer host material and phosphorescent guest luminescent material/electron transfer layer/metal are cloudy Pole, the compound of the material of main part of luminescent layer as described in right 1, guest materials is metal complex phosphor material.
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