电致发光材料PPV的合成研究——I.PPV前驱聚合物的合成

报道了新型电致发光材料－－聚对苯撑乙烯前驱聚合物的合成方法，研究了各中间体的合成工艺。并对前驱聚合物进行了性能测试。结果表明所 合成方法合理可行，并为ＰＰＶ的合成提供参考数据。     

PPV类电致发光聚合物研究进展

聚合物电致发光现象的研究是９０年代聚合物科学领域的重大发现,它的广泛应用将引起显示科学的一场变革。文中对聚对苯乙烯类电致发光滞物的合成和性能进行了综述。     

PPV材料的合成研究进展

阐述了聚对苯撑乙烯 (PPV)及其衍生物作为发光二极管 (LED)发光层材料的合成研究 ,详细归类了常见的合成方法 ,为今后该领域新材料的合成指明了方向。     

共轭导电聚合物电致发光元件的原理及进展

本文综述了共轭导电聚合物在电致发光元件中的应用,介绍了导电聚合物发光二极管和导电聚合物电化学发光电池的结构,发光原理及研究进展。     

聚合物基吸波材料的研究进展

电磁波吸收材料作为功能材料在军用和民用领域都有非常广泛的应用,聚合物基吸波材料可以满足吸波材料向厚度薄、质量轻、频带宽、强吸收方向发展的需要,是目前电磁波吸收材料研究的重点之一。综述了金属、铁氧体、金属镀层复合、碳系等类型的吸收剂在聚合物体系中的研究进展,同时对目前聚合物基吸波材料的类型进行了介绍。     

PPV型共轭聚合物的三种典型聚合方法

本文对聚苯乙炔 (PPV)型共轭聚合物的 3种典型聚合方法进行了综述 ,包括 ( 1)Wessling前驱聚合物法 ,( 2 )Wittig反应 ,( 3 )Heck偶联反应 ,其间简要地介绍了一些重要的结论。     

共轭聚合物的合成研究

合成了聚（２－甲氧基－５－丙氧基－１,４－亚苯基亚乙烯）（ＰＭＯＰＯＰＶ）、聚（２－甲氧基－５－丁氧基－１,４－亚苯基亚乙烯）（ＰＭＯＢＯＰＶ）、聚（２－甲氧基－５－庚氧基－１,４－亚苯基亚乙烯）（ＰＭＯＨＯＰＶ）３种共轭聚合物并对其合成全过程进行了研究。结果表明,聚合时间为３０ｈ,反应温度为室温,ＰＨ值为１４,ＰＭＯＰＯＰＶ不溶于ＣＨＣｌ３,地产物进行了表征并讨论了反应历程。     

共轭聚合物传感器研究进展

共轭聚合物由于其独特的荧光信号放大和光电特性,以及水溶性和生物相容性,已广泛应用于化学及生物传感器。共轭聚合物分子有共轭链,电子和能量沿共轭骨架自由流动。聚合物单体所收集的光能以收集的形式传递,可以产生荧光信号放大效应。综述了近年来共轭聚合物在传感器应用上的研究进展,并预测了共轭聚合物在传感器应用的发展方向。     

含亚芳基杂链有机硅聚合物研究进展

总结了近10年来含亚芳基杂链有机硅聚合物的研究进展,对其合成方法、分子结构、高低温耐辐照性能等进行了综述.对研究中所存在的问题及未来的研究方向进行了评述.     

表面活性剂对共轭聚合物羧基化PPV荧光性质的影响

研究了不同表面活性剂对水溶性共轭聚合物聚[2-甲氧基-5-(10-羧基癸氧基)]对苯乙炔(MDC-PPV)荧光性质的影响。结果表明,非离子型表面活性剂和阳离子型表面活性剂使共轭聚合物MDC-PPV的荧光强度增强,而阴离子型表面活性剂使MDC-PPV的荧光强度减弱。     

Preparation of poly(phenylene vinylene) nanofibers by electrospinning

PPV nanofibers were fabricated by electrospinning PPV precursor solution in solvent mixtures of ethanol/water. PPV nanofibers with smooth surface were obtained when the ethanol/water ratio was 70/30 (w/w) and the average diameter was 653 nm. The fluorescence peak positions of fibers were in 515 and 550 nm, which were the same as that of PPV film. The morphology of fibers has been characterized by scanning electron microscopy (SEM) and fluorescence microscopy.     

New semi-conducting poly(phenylene vinylene-alt-anthrylene vinylene)s: Synthesis,characterization and photophysical properties

An anthracene-based semi-conducting polymer (P1) and its cyano-analogue (P2) were synthesized via the Wittig and Knoevenagel polycondensations. The polymers were soluble in common organic solvents and have number-average molecular weights of 13,750 and 6430 g mol⁻¹ for P1 and P2, respectively. The DSC analyzes show a good thermal stability and an amorphous morphology in solid state for these organic materials. The optical properties of the polymers were investigated by UV–visible absorption and fluorescence spectroscopies. The HOMO and LUMO levels were estimated using cyclic voltammetry analysis. The effect of cyano group on the photophysical properties of poly(phenylene vinylene-alt-anthrylene vinylene)s was investigated. The results demonstrate an enhancement in the ionization potential and a significant improvement of the fluorescence yield due to introduction of such groups into the π-conjugated system. Single-layer diodes based on these organic semiconductors have been fabricated and showed relatively low turn-on voltages.     

共轭聚合物—聚对苯撑乙烯齐聚物的合成及发光性质的研究

以Ｗｉｔｔｉｇ反应的方法，分别合成了五种聚对苯撑乙烯（ＰＰＶ）齐聚物，并用红外光谱、核磁共振、紫外－可见光谱及荧光光谱对所得齐聚物进行了测试和表征，发现它们的溶解性能有所改善，紫外可见光谱均向红移。     

Study on novel second-order NLO azo-based chromophores containing strong electron-withdrawing groups and different conjugated bridges

Novel NLO azo-based chromophores containing strong electron-withdrawing groups and benzene or thiazole moiety as conjugated bridges were synthesized and characterized. values were measured by HRS method, they are in the range of 238–1459 × 10^–30 esu at the fundamental wavelength of 800 nm. For chromopheres 3 and 4, values at the fundamental wavelength of 1064 nm were also measured, they are 1575 × 10^–30 esu and 935 × 10^–30 esu, respectively. Thermal stabilities for these chromophores are reported. We also discuss the effects of different acceptors and conjugating moieties on .     

Blinking suppression and intensity recurrences in single CdSe-oligo(phenylene vinylene) nanostructures: experiment and kinetic model

We report time-resolved single molecule fluorescence imaging of individual CdSe quantum dots that are functionalized with oligomeric conjugated organic ligands. The fluorescence intensity trajectories from these composite nanostructures display both a strong degree of blinking suppression and intensity fluctuations with characteristic recurrence times on the order of 10-60?s. In addition, fluorescence decay rate measurements of individual hybrid nanostructures indicate significantly modified non-radiative quantum dot decay rates relative to conventional ZnS-capped CdSe quantum dots. We show that a modified diffusive reaction coordinate model with slow fluctuations in quantum dot electron energies (1S(e), 1P(e)) can reproduce the experimentally observed behaviour.     

Fluorescence lifetimes and correlated photon statistics from single CdSe/oligo(phenylene vinylene) composite nanostructures

We present measurements of fluorescence intensity trajectories and associated excited-state decay times from individual CdSe/oligo(phenylene vinylene) (CdSe-OPV) quantum dot nanostructures using time-tagged, time-resolved (TTTR) photon counting techniques. We find that fluorescence decay times for the quantum dot emitter in these composite systems are at least an order of magnitude shorter than ZnS-capped CdSe quantum dot systems. We show that both the blinking suppression and associated lifetime/count rate behavior can be described by a modified version of the diffusive reaction coordinate model which couples slow fluctuations in quantum dot electron (1Se, 1Pe) energies to Auger-assisted hole trapping processes, hence modifying both blinking statistics and excited-state decay rates.     

A novel building block for donor-acceptor conjugated polymers containing perylene, poly(p-phenylenevinylene), and fullerene

A series of new polymers containing perylene, poly(p-phenylenevinylene) (PPV) and/or pendant fullerene units have been synthesized by Wittig condensation. All of the polymers were characterized by 1HNMR, FT-IR, and GPC. The optical properties of the polymers were studied by UV-vis and FL spectra. The cyclic voltammetry showed us a good candidate for a photoinduced electron-transfer system. And the photocurrent measurement revealed an interesting phenomenon that the photocurrent increased with the contents of the fullerene in the polymers increased.