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聚[2-甲氧基-5-(4-溴-丁氧基)对苯乙炔]新型前聚物的合成及表征] 总被引:1,自引:0,他引:1
采用不同方法由三锍盐合成新型的聚电解质前聚物及可溶于有机溶剂的侧链溴代聚对苯乙炔前聚物,发现侧链烷氧取代基上的锍盐并不参与聚合,所得前聚物加热后都可转化为聚对苯乙炔.光物理初步研究表明,溴代侧链聚对苯乙炔与C60掺杂后具有良好的光电特性.以IR、UV-Vis、1H NMR、DSC对单体及前聚物进行了表征. 相似文献
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聚对苯乙炔(PPV)及其衍生物是制备聚合物发光二极管的最重要的聚合物之一[1].这主要是因为它们具有优越的电致发光性能,易于合成以及良好的环境稳定性[2].而聚(2-甲氧基-5-(2'-乙基-己氧基)-对苯乙炔)(MEH-PPV)由于其可溶性好,发光效率和亮度高,在电致发光领域广受关注.现在有许多MEH-PPV的多步化学合成方法以及电化学合成方法.但是,这些方法常常产率低,成本高且产品不纯.本文报道一种固/ 液两相反应一步合成分子量大、溶解性好的MEH-PPV的新方法. 相似文献
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采用不同方法由三铳盐合成新型的聚电解质前聚物及可溶于有机溶剂的侧链溴代聚对苯乙炔前聚物,发现侧链烷氧取代基上的铳盐并不参与聚合,所得前聚物加热都可转化为聚对苯乙炔。 相似文献
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不对称烷氧基取代聚对苯乙炔的合成及电致发光性能 总被引:3,自引:0,他引:3
利用强碱诱导的去卤缩合聚合法,合成了不对称烷氧基取代的聚(2-甲氧基-5-十二烷氧基-1,4-对苯乙炔)(PMDPV).其溶解性和成膜性能优于对称取代的聚(2,5-双十二烷氧基-1,4-对苯乙炔).以PMDPV为发光层质的聚合物电致发光器件,其发光峰值波长为605nm.并用IR、UV-Vis、TGA、1HNMR、GPC等对所合成的聚合物进行了表征. 相似文献
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Daniel A. Scola 《Journal of polymer science. Part A, Polymer chemistry》1993,31(9):2271-2286
A series of Diels–Alder addition-type copolymers prepared from 1,4,5,8-tetrahydro-1,4;5,8-diepoxyanthracence and anthracene end-capped 6F-PDA imide oligomers were characterized. The composition of the anthracene end-capped imide oligomers was found to be sensitive to monomer molar ratios and the mode of monomer addition. The resistance of the copolymer to thermooxidative degradation at 316 and 371°C was compared with a similar commercial polymer called Avimid-N prepared from 4,4′-hexafluoroisopropylidene-2,2′ bis(phthalic acid anhydride) and para-and meta-phenylene diamine, abbreviated 6F-PDA. There are strong indications that the copolymers undergo degradation initially by unzipping the diepoxyanthracene unit from the anthracene end-capped 6F-PDA oligomer unit (Avimid-N like repeat unit), followed by a slower degradation of the more stable residual 6F-PDA unit. © 1993 John Wiley & Sons, Inc. 相似文献
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Ruei‐Tang Chen Wen‐Fen Su Yun Chen 《Journal of polymer science. Part A, Polymer chemistry》2011,49(1):184-191
This article presents the synthesis and electroluminescent (EL) properties of a stable blue‐light‐emitting copolyfluorene ( P1 ) consisting of carbazole, oxadiazole and charge‐trapping anthracene groups by Suzuki coupling reaction. The hole‐transporting carbazole and electron‐transporting oxadiazole improve charges injection and transporting properties, whereas the anthracene is the ultimate emitting chromophore. The thermal, photophysical, electrochemical, and EL properties of P1 were investigated by thermogravimetric analysis, differential scanning calorimeter, optical spectroscopy, cyclic voltammetry, and EL devices fabrication and characterization. P1 demonstrated high‐thermal stability with thermal decomposition and glass tranistion temperatures above 400 and 145°C, respectively. In film state, P1 showed blue emission at 451 nm attributed to anthracene chromophore. Photophysical and electrochemical investigations demonstrate that effective energy transfer from fluorene to anthracene segments and charges trapping on anthracene segments leads to efficient and stable blue emission originating from anthracence. Polymer light‐emitting diodes using P1 as the emitting layer (ITO/PEDOT:PSS/ P1 /Ca/Al) exhibited excellent current efficiency (5.1 cd/A) with the CIE coordinate being (0.16, 0.11). The results indicate that copolyfluorene is a promising candidate for the blue‐emitting layer in the fabrication of efficient PLEDs. © 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2010 相似文献
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Joji Ohshita Shinji Kangai Hiroto Yoshida Atsutaka Kunai 《Journal of organometallic chemistry》2007,692(5):1020-1024
Stille coupling reactions of bis(stannylphenyl- and stannylthienyl)silane with dibromonaphthalene and bis(bromothienyl)anthracene gave the corresponding polymers containing naphthylene or anthrylene units in the backbone. Applications of the polymers to electroluminescent (EL) devices were examined and it was found that the diphenyleneanthrylene-containing polymer can be used as a good hole-transporting material in a double-layered EL device. 相似文献
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Eugene I. Mal'tsev Maria A. Brusentseva Dmitry A. Lypenko Vladimir I. Berendyaev Vladislav A. Kolesnikov Boris V. Kotov Anatoly V. Vannikov 《先进技术聚合物》2000,11(7):325-329
Optical and electroluminescent properties of a new soluble anthracene‐containing polyimide (ACPI) was studied. Solubility of ACPI in organic solvents allows direct spin casting of the polymer films exhibiting intense photo‐ and electroluminescence (EL) in the visible range. This non‐conjugated polymer was used as emitting and electron‐hole transporting layers in polymer light‐emitting devices (LEDs). EL properties of the uni‐ and bilayer LEDs are discussed in terms of the band structure, bipolar transport and electron donor‐acceptor interactions. Copyright © 2000 John Wiley & Sons, Ltd. 相似文献
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Photo- (PL) and electroluminescence (EL) properties of three different PPV derivatives carrying the 9,10-diphenylanthracene units are compared. One (polymer 1 ) of the polymers contains the 9,10-diphenylanthracene structure as an integral part of the main chain, but the other two have it as the pendent group attached to the main chain through either oxyethyleneoxy (polymer 2 ) or oxyhexamethyleneoxy (polymer 3 ) spacer. Polymers 1 and 2 exhibit very similar PL and EL spectra that are more or less of superimposed feature of the spectra from the backbones and the anthracene pendents. In contrast, polymer 3 shows an EL spectrum that is completely different from its PL spectrum. Whereas the PL spectrum of polymer 3 appears to be a combination of the spectra from the main chain and the pendents, as for polymer 1 and 2 , the EL spectrum of polymer 3 , however, looks as if the lights were emitted only from the backbone. This difference is explained in terms of excited state electronic interactions between the main chain and the pendents. 相似文献
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NIU Jun-feng YANG Mu-jie ** Department of Polymer Science Engineering Zhejiang University Hangzhou P. R. China 《高等学校化学研究》2002,18(1)
IntroductionSince the firstreport in1 990 of the electro- lu-minescence of the conjugated polymers in the filmof poly(p- phenylenevinylene) sandwiched betweenan anode and a cathode of appropriate work func-tions[1] ,enormous efforts have been devoted to thesynthesis of light emitting polymers[2— 4 ] .Owing toconjugated polymers′ photoluminescence and elec-troluminescence having been found out,their im-portant properties,polymer processability,bandgap tunability and mechanical flexibility mak… 相似文献
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Mary Ann B. Meador Diane C. Malarik Michael A. Olshavsky 《Journal of polymer science. Part A, Polymer chemistry》1992,30(2):305-312
1,4,5,8-Tetrahydro-1,4;5,8-diepoxyanthracene reacts with various anthracene end-capped polymide oligomers to form Diels-Alder cycloaddition copolymers. The polymers are soluble in common organic solvents, and dehydrate thermally at temperatures of 300–350°C to give thermal oxidatively stable pentiptycene units along the polymer backbone. Because of their high softening points and good thermal oxidative stability, the polymers are candidates for matrix resins for high temperature composite applications. To assess their usefulness for such applications, several parameters have been studied affecting the properties of the final polymer. These parameters include varying the formulated molecular weight of the end-capped prepolymers, and use of meta-substituted aromatic diamine in place of some of the para-substituted diamine. Processability of the resins was studied using rheometric spectrometry, and a processing scheme was devised. Finally, several formulations of neat resins were compression molded into coupons, and evaluated for longterm stability in air at 315 and 371°C. The best combination of good processability and thermal oxidative stability was obtained from polymers synthesized with small amounts of meta-diamine substitution and higher formulated molecular weight prepolymers. 相似文献
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Yue‐Qi Mo Xian‐Yu Deng Xi Jiang Qiu‐Hong Cui 《Journal of polymer science. Part A, Polymer chemistry》2009,47(13):3286-3295
Poly(3,6‐silafluorene) is a typical wide band‐gap conjugated polymer with ultraviolet light emission. The blue electroluminescence from the 3,6‐silafluorene‐based copolymers via intrachain energy transfer was reported in this study. The monomer containing vinylene, anthracene, and tri‐arylamine moieties incorporated into the poly(3,6‐silafluorene) backbone can form efficient deep‐blue emitting copolymers with EL efficiency of 1.1–1.9%. © 2009 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 47: 3286–3295, 2009 相似文献
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As semiconducting materials in organic light-emitting devices (OLEDs), a novel, highly soluble poly[(3-octylthiophene)-co-(3-(2-ethyl-1-hexylthiophene))] (P3OTIOT) and the corresponding homopolymers (poly(3-octylthiophene) (P3OT) and poly(3-isooctylthiophene) (P3IOT)) were prepared by an FeCl3-oxidative approach to compare their photoelectric properties. Characterization of the polymers included FT-IR, 1H NMR, gel permeation chromatography (GPC), thermo-gravimetric analysis (TGA), UV-vis spectroscopy, photoluminescence (PL) and electroluminescence (EL). P3OTIOT and P3OT depicted excellent solubility in common organic solvents. TGA studies showed that all of the materials exhibited very good thermal stabilities, losing 5% of their weight on heating to 300 °C. The optical property investigations showed that the band-gap energy of P3OTIOT was similar to that of P3OT (2.43 eV) at 2.45 eV and 6% lower than that of P3IOT (2.6 eV) in CHCl3 solution. In PL spectra, the emission maxima of P3OTIOT and P3IOT were 50 nm and 130 nm blue-shifted with respect to that of P3OT, respectively. However, the PL intensity of P3OTIOT was seven times higher than that of P3OT. Single layer polymer light-emitting devices (PLEDs) with the ITO/polymer/Ag configurations were fabricated by the spin-coating method with P3OT, P3IOT and P3OTIOT as the EL materials, which exhibited red (650 nm), orange-red (610 nm) and yellow-green (525 nm) EL, respectively. The external EL quantum efficiencies (QE) of P3IOT and P3OTIOT devices are 6.4 × 10−3% and 5.1 × 10−3% which are about five and four times higher than that of the P3OT device (1.2 × 10−3%), respectively. The turn-on voltage of the P3OTIOT device (5 V) is between that of the P3OT (4.5 V) and P3IOT (6 V) devices. These results indicated that the P3OTIOT combined the photoelectric properties of P3OT and P3IOT with excellent solubility, processability, low band-gap energy, high QE and low turn-on voltage in the PLEDs, and they might be excellent polymeric materials for applications in organic light-emitting diodes, light-emitting electrochemical cells and polymer solar cells. 相似文献