荧光共轭聚合物传感器用于病原体检测的研究进展

以共轭聚合物为基础的传感器用于检测病原体是现代临床医学发展的一个新方向. 综述了近十年来聚二乙炔(PDA)以及聚苯撑乙炔撑(PPE)等共轭聚合物传感器用于病原体检测的研究进展.     

导电高聚物聚苯乙炔及其衍生物

聚苯乙炔(PPA)是一种具有半导体特性的高聚物。本文介绍了PPA及其衍生物的合成、化学结构与谱图及载流子的输运性质。     

非线型聚苯类大分子的研究进展

对支化及树枝状聚苯、环状聚苯、环状聚苯乙炔以及环蕃等几类以苯环为基本结构单元的非线型大分子的研究, 特别是合成作了综述。     

PPV-PDMeOPV共聚物发光性质的实验和理论研究

具有优良电致发光性能的有机聚合物材料的研制及其发光性能和应用的研究是９０年代新兴的高科技领域．聚对苯乙炔［Ｐｏｌｙ（ｐ－ｐｈｅｎｙｌｅｎｅｖｉｎｙｌｅｎｅ）,缩写为ＰＰＶ,又称聚苯撑乙烯］是这一领域最先研制出来的具有代表性的材料［１,２］．为改变ＰＰ...     

几种电致发光聚合物材料的研究进展

介绍了几种典型的电致发光聚合物材料,包括聚(对苯乙烯撑)及其衍生物、聚噻吩及其衍生物、聚芴及其衍生物,对它们的结构、制备方法、特点进行了归纳和讨论。其中最重要的是聚(对苯乙烯撑)(PPV)及其衍生物,目前采用较多的制备方法是前聚物法和强碱诱导的去卤缩合法以及电化学聚合法。在苯环上引入长链烷烃、烷氧基或芳基后的取代PPV,即PPV的衍生物,可溶于很多有机溶剂。可溶性PPV衍生物为制备多层电致发光聚合物器件提供了有效途径。文章还对电致发光聚合物材料存在的问题和发展前景进行了探讨和展望。     

非共价键自组装制备聚对苯撑乙炔/聚丙烯酸水溶性荧光纳米粒子及其光物理行为研究

通过功能化聚对苯撑乙炔(含羟基与氨基)和聚丙烯酸之间的非共价键自组装制备了一系列含共轭聚合物的水溶性荧光纳米粒子, 并进行了相关结构和光学性质表征. 研究表明, 纳米粒子的大小和聚丙烯酸/聚对苯撑乙炔质量比直接相关. 光物理性质研究表明, 形成水溶性纳米粒子后, 疏水的聚苯撑乙炔链在纳米粒子中易于形成π-链间聚集, 其光物理性质与其在薄膜态时相似.     

带树枝状侧链聚苯乙炔的合成与结构表征

合成了带树枝状聚苯甲醚修饰基团的苯乙炔单体,在Rh[(nbd)Cl2]2催化剂的作用下得到了侧链带聚苯甲醚树枝的新型聚苯乙炔衍生物,用红外吸收光谱、核磁共振谱、紫外可见吸收光谱和凝胶渗透色谱表征了聚合物的结构.发现聚合物的重均分子量达到了57300,在氯仿、N,N-二甲基甲酰胺、四氢呋喃等有机溶剂中有良好的溶解性能.由于侧链上聚苯甲醚树枝体积庞大,聚合物主链采取立构规整的顺-顺式构象,紫外可见吸收光谱在440nm附近出现了显著的共轭主链的吸收肩峰;立构规整的顺-顺式构象使树枝状侧链形成了对主链保护的"夹套效应",聚合物热分解温度从聚苯乙炔母体的225℃提高到295℃.     

导电聚合物LB膜

本文回顾了ＬＢ膜技术在导电聚合物体系中的利用，内容涉及共轭型导电聚合物（包括聚吡咯、聚噻吩、聚对亚苯基亚乙烯基、聚苯胺及其衍生物）ＬＢ膜的制备、结构表征、电导率与分子结构和分子堆砌之间的关系以及其他导电聚合物ＬＢ膜的研究现状。     

基于荧光共轭聚电解质的生物分子检测*

共轭聚电解质综合了传统共轭聚合物的光电性质和聚电解质的水溶性特点,使其在新一代化学生物荧光传感器中获得多种应用。本文总结了近五年来报道的共轭聚电解质（聚芴、聚噻吩、聚苯撑乙烯、聚苯撑乙炔等）用于检测生物分子的研究进展,并对共轭聚电解质的应用前景进行了展望。     

含氟芳杂环高分子及其在微电子工业中的研究进展

综述了近年来国内外在含氟芳杂环高分子方面的研究及应用进展情况。主要介绍了含氟聚苯并睬咪唑(PBI)、聚苯并喏唑(PBO)、聚芳醚(PAE)及其衍生物等材料。从含氟单体的合成、聚合物的合成及其应用等几个方面进行了阐述。     

聚合物非线性光学材料

最近,有机非线性光学材料已引起了人们极大的兴趣。一些可极化有机分子具有很大的分子超极化率,可惜,受晶体对称性的限制仅有少数晶体具有二阶非线性光学效应。极化聚合物可以产生统计非中心对称的环境,使材料的二阶特性显示出来。本文在简单介绍了有机非线性光学和极化的原理后,综述了聚合物二阶非线性光学材料的研究进展。此外,对聚合物的三阶非线性光学效应的研究也作了介绍。     

Synthesis of Imidazole Derivatives for Their Second-order Nonlinear Optics

The design and the synthesis of two conjugated donor-acceptor imidazole derivatives(1,2) were carried out for second-order nonlinear optics.The thermal properties.The transparency and second-order nonlinear optical properties of the molecules were investigated.The experimental results indicate that a good nonlinearity-transparency-thermal stability trade-off is achieved for them.     

Polymers for Electro‐Optical Modulation

Second‐order nonlinear optical (NLO) properties of polymeric materials have been attracting a lot of attention, especially for such potential applications as fast waveguides electrooptic (EO) modulation and frequency‐doubling devices. For these photonic applications, the performance of the NLO materials has to be optimized. This requires not only a fundamental knowledge of inter‐relationship between their chemical and NLO properties, but new technologies competitive or superior to existing ones as well. This review focuses on the synthesis of NLO polymers including chromophore design, and the comparison among comprehensive EO polymer systems. Moreover, characterization and device fabrication of electro‐optical polymer planar waveguides are also reported in this review.     

二阶非线性光学聚合物材料研究进展

在介绍非线性光学效应和聚合物极化原理的基础上,综述了非线性光学聚合物材料的研究进展。     

Poled amorphous polymers for second-order nonlinear optics

Recent advances in poled amorphous polymers for second-order nonlinear optics are discussed with emphasis on stabilizing the frozen-in nonlinearity via chemical crosslinking under electric fields. Specific examples of a linear polymer and a crosslinked polymer, both with nitroaniline-type chromophores covalently attached as side groups, are presented and compared in their glass transition behavior, linear optical properties, poling dynamics, and stability of frozen-in nonlinearity. It is demonstrated that by employing chemical crosslinking under electric fields one can prepare highly efficient and stable poled polymers that exhibit no decay in nonlinearity at ambient conditions and no apparent tendency of decay even at 85°C as well as excellent optical properties. The historical development of organic materials for second-order nonlinear optics and recent advances in device fabrication based on poled polymers are also discussed briefly.     

Nonlinear optical properties of polymers and thin polymer films

An introduction to nonlinear optics (NLO) and the major challenges in the field of NLO-properties of polymeric materials, is given in this paper. Methods for the investigation of nonlinear optical properties of [4-(2-methacryloxyethyl)methylamino]-4′-cyanoazobenzene copolymers with methyl methacrylate (MMA) are demonstrated: Electric Field Induced Second Harmonic Generation (EFISHG), Hyper Rayleigh Scattering (HRS), Second Harmonic Generation (SHG) in floating monolayers and SHG in poled polymer films. An example of phase-transition analysis by SHG is given.     

酞菁高分子修饰及其光电性质研究进展

酞菁拥有高度离域的二维18π电子共轭体系、易于调变的分子结构、优良的热和化学稳定性和易于处理加工等特点,可以在很宽的范围内剪裁它们的物理、光电和化学参数,其潜在的巨大应用价值已受到科学与企业界的广泛关注和研究。与[60]富勒烯一样,酞菁分子也可以通过共价键合的方式引入到高分子主链或侧链形成不同类型的高分子,亦可得到诸如酞菁网状高分子和树枝状酞菁大分子等高分子材料;与适宜的高分子材料掺杂或共混能形成含酞菁的高分子复合材料。本文详细地介绍了近年来酞菁高分子修饰与光电性质研究进展。     

Study on thermal stability of poled non-linear optical polymers

A logarithmic expression is proposed to describe relaxation of the polar order in side chain polymers,together with a new way of plotting temperature dependent relaxation data.This results in a straight line extending even below the glass transition temperature in the case of poled nonlinear optics (NLO) side chain polymers.A simple procedure to determine the rotational diffusion constant Dr is given and Dr values of several polymer systems have been evaluated and compared with each other.It appears that,starting from the conventional and well known poled polymer system currently applied,a further lowering of Dr by about 3 orders of magnitude is necessary in order to reach an acceptable orientational stability or lifetime of poled polymers for practical applications.Attempts have been made to introduce electron push-pull substituents into high thermostable molecular frameworks and results of preliminary measurements are reported.     

非线性光学材料的分子设计研究

非线性光学研究应用电磁场和各种材料的相互作用, 产生新的电磁场, 改变频率, 相或其它物理性质. 本文介绍了非线性光学材料分子设计的原理, 并以共轭长链分子和碳笼及其衍生物为例报道了我们在这方面的研究工作.     

Nonlinear Optical Properties of Porphyrin Derivatives with Electron‐donating or Electron‐withdrawing Substituents

To investigate photoelectric properties of meso‐extended porphyrin derivatives with electron‐donating or electron‐withdrawing substituents, a series of functionalized porphyrin materials have been designed and synthesized by Suzuki coupling reaction. The meso‐extended structures were fully characterized by ¹H NMR, IR spectroscopy and mass spectrometry. The photophysical properties of porphyrin derivatives were carefully examined by UV‐Visible and fluorescence spectra, and the solvatochromic effect was observed and discussed. In particular, Z‐scan technique was employed to characterize the third‐order nonlinear optical (NLO) properties of the products such as nonlinear absorption and refraction, the third‐order nonlinear refractive indexes (??⁽³⁾‐value) of these porphyrin derivatives achieved 3.9×10^?12 esu. In addition, the compounds could be self‐assembled into highly organized morphologies through phase‐exchange method. All the results indicated that the discotic materials have the potential for optoelectronic applications.