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聚苯撑乙烯(PPV)类聚合物是优异的发光材料, 有望作为全色显示中三基色的材料之一得到应用. 我们采用2-溴-1,4-亚二甲苯二乙酯为原料, 合成了商品名为Supper Yellow PPV (SY PPV)的苯基取代PPV. 中间体、单体和聚合物的结构都通过核磁共振、元素分析进行了表征. SY PPV的吸收峰在434 nm, 吸收边在510 nm, 带隙2.44 eV. 光致发光峰值和电致发光峰值分别在516和552 nm. SY PPV的器件性能为: 启动电压为2.4 V, 最大亮度大于49000 cd·m-2, 最大流明效率为21 cd·A-1, 显著优于采用老方法合成SY PPV的最大流明效率(16-18 cd·A-1). 相似文献
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通过Wittig反应合成了新型聚对苯乙烯撑类阳离子共轭聚合物, 并进行了相关结构表征和光学性质表征. 从1H NMR 谱图分析得知, 该聚合物具有一定含量的顺式构型. 经过季铵化以后得到相应的阳离子共轭聚合物. 荧光猝灭行为研究表明, 该阳离子共轭聚合物表现出不完全荧光猝灭. 相似文献
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带不同推电子基团二聚苯撑乙的电子结构与发光性能 总被引:2,自引:2,他引:0
用Wittig路线合成了一系列带不同推电子取代基的二苯撑乙烯,用紫外光谱和循环伏安方法测定其电子结构,并用量子化学计算方法对齐聚物的电子能级进行模拟,讨论了吸收光谱,发射光谱与生色团的电子结构的叛乱 相似文献
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聚苯撑乙烯(PPV)由于其光致发光效率高、电荷传输性能好、可修饰等优点,自从1990年剑桥大学卡文迪许实验室实现其电致发光以来,一直是人们的研究热点.为了提高PPV的加工性能,人们用取代基增加其溶解性,经过适当修饰的PPV衍生物可溶于普通有机溶剂,具有良好的成膜性能.关于水溶性PPV研究的报道很少.通过自组装技术将水溶性共轭聚合物构建成发光材料及高敏感 相似文献
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共轭聚合物材料及电致发光器件 总被引:5,自引:0,他引:5
共轭聚合物是一种极有应用前景的有机半导体材料,本文综述其研究进展,包括典型共轭聚合物材料PPV、PT、PF等及PPP的工作原理,发展前景和存在的问题。 相似文献
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带不同推电子基团二聚苯撑乙烯的电子结构与发光性能 总被引:1,自引:0,他引:1
用Wittig路线合成了一系列带不同推电子取代基的二聚苯撑乙烯,用紫外光谱和循环伏安方法测定其电子结构,并用量子化学计算方法对齐聚物的电子能级进行模拟.讨论了吸收光谱、发射光谱与生色团的电子结构的关系. 相似文献
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制备了一种齐聚苯撑乙烯(OPPV)/MCM-41复合材料. 氮气吸附等温线结果证明了OPPV被成功包覆在MCM-41中. 紫外-可见光谱结果表明, OPPV以近乎单分散的状态分布在MCM-41孔道中. 荧光光谱结果表明, 与OPPV相比, OPPV/MCM-41复合材料具有更强的光稳定性和更高的发光效率. 相似文献
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The Synthesis and Electronic Characteristics of Poly(p-Phenylene Vinylene) Derivatives 总被引:1,自引:0,他引:1
《中国化学快报》1998,(1)
Poly(P-phenylenevinylene)rePV)anditsderivahveshavearousedgreatinterest,"'sinceBurroughes'discoveredilmtPPVshowedexcellentelectrolulninescent(EL)propelles.However,PPVanditsderivativessynthesizedbyconventionalpolylnerizationreachons4areusuallyinsolubleandinfusible,wllicllshowsinferiorineclwnicalpropelles.AlthoughtheprecursorpolymerroutecancirculllventhleinsolubilityofPPV,thestfategyneedsamuhstepreachonandaltiglltemperaturewlilcllaITordsaleyieldandohlerdisadvantages.'So1lieSynthesisofsolub… 相似文献
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高分子量PPV的合成、掺杂及导电性 总被引:5,自引:0,他引:5
高分子量的聚对苯乙炔(PPV)是从单体1.4一二氯甲基苯合成,后者聚合产生水溶性铳盐,此时,对于PPV的转换可用二甲硫醚和盐酸的热消除反应,从水溶液中成膜。用IR、UV-Vis、TGA分析研究了消除反应。PPV膜具有良好的机械性能,而且可能是由于n-和p-型杂质得到的材料具有的导电性近似于这些高掺杂聚乙炔。中间聚电解质的转换率对于PPV可能是一种调整,并且这些掺杂膜的导电性,可能与平均共轭长度有关 相似文献
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The molecular dynamics of p-phenylene vinylene (PPV) oligomers, synthesised by a condensation reaction and separated by molecular distillation, have been investigated using the electrooptic Kerr effect. The experimental Kerr constants of these materials change sign from positive to negative in going from n = 1 to n = 2 and are not in good agreement with theoretical results. The discrepancies, which increase in magnitude as n increases, can be attributed to solvent-solute interactions, the nonplanar nature of PPV oligomers, or the nonvalidity of the additivity scheme chosen for calculation of theoretical quantities. © 1996 John Wiley & Sons, Inc. 相似文献
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Three new conjugated poly(p‐phenylene vinylene) (PPV) derivatives bearing triphenylamine side‐chain through a vinylene bridge, poly(2‐(4′‐(diphenylamino)phenylenevinyl)‐1,4‐phenylene‐vinylene) (DP‐PPV), poly(2‐(3′‐(3″,7″‐dimethyloctyloxy)phenyl)‐1,4‐phenylenevinylene‐alt‐2‐(4′‐ (diphenylamino)phenylenevinyl)‐1,4‐phenylenevinylene) (DODP‐PPV), and poly(2‐(4′‐(diphenylamino)phenylenevinyl)‐1,4‐phenylenevinylene‐co‐2‐(3′,5′‐bis(3″,7″‐dimethyloctyloxy)‐1,4‐phenylenevinylene) (DP‐co‐BD‐PPV), were synthesized according to the Gilch or Wittig method. Among the three polymers, the copolymer DP‐co‐BD‐PPV is soluble in common solvents with good thermal stability with 5% weight loss at temperatures higher than 386°C. The weight‐average molecular weight (Mw) and polydispersity index (PDI) of DP‐co‐BD‐PPV were 1.83 × 105 and 2.33, respectively. The single‐layer polymer light‐emitting diodes (PLEDs) with the configuration of Indium tin oxide (ITO)/poly (3,4‐ethylenedioxythiophene): poly(4‐styrene sulfonate)(PEDOT:PSS)/DP‐co‐BD‐PPV/Ca/Al were fabricated. The PLED emitted yellow‐green light with the turn‐on voltage of ca. 4.9 V, the maximum luminance of ca. 990 cd/m2 at 15.8 V, and the maximum electroluminescence (EL) efficiency of 0.22 cd/A. Copyright © 2007 John Wiley & Sons, Ltd. 相似文献
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Ting-Wei Hsu Samuel J. Kempel Quentin Michaudel 《Journal of polymer science. Part A, Polymer chemistry》2022,60(3):569-578
Poly(p-phenylene vinylene)s (PPVs) are some of the most widely studied conjugated polymers in academia and industry, but most production methods lack precise control over molar masses and alkene stereochemistry. These critical parameters have a large influence on processability, polymer morphology, and optical properties. Herein, we report the stereoretentive ring-opening metathesis polymerization (ROMP) of [2.2]paracyclophane dienes bearing either a linear alkyl substituent or a branched alkoxy substituent to form all-cis PPVs with great solubility in organic solvents. The introduction of 2-ethylhexyloxy side-chains permits the preparation of PPV with uncharacteristically high molar masses (up to 108.8 kg/mol) for a polymerization with living characteristics. Exposure to UV light (365 nm) rapidly induces isomerization of all-cis alkenes leading to the formation of all-trans PPV. This study proposes an attractive strategy to synthesize soluble all-cis and all-trans PPVs with tunable, high molar masses through careful design of the ROMP monomer. 相似文献