非共轭高聚物可以导电

原来认为,具有单双键交替的共轭骨架是导电高聚物的基本结构特征。AT ＆ T Bell实验室的M.K.Thakur最近发现,在天然橡胶(顺式聚异戊二烯)掺碘以后可具有导电性,电导率为10~(-1)—10~(-2)(Q·cm)~(-1),比未处理者高约10个量级。Thakur认为基本上属于电子导电,载流子在不同高聚物链之间跳跃。反式聚异戊二烯     

聚并硒吩导电高聚物的电子结构及其掺杂导电机制的探究

聚并硒吩导电高聚物的电子结构及其掺杂导电机制的探究徐龙君，林宪杰（重庆大学化学系，重庆６３００４４）（菏泽师专化学系，菏泽２７４０１５）王荣顺（东北师大化学系，长春１３００２４）关键词：硒吩，导电高聚物，ＥＨＭＯ。聚并硒吩包括聚吡咯并［３．２－ｂ］硒...     

导电高聚物／溶液界面SERS效应的诱导产生

导电高聚物是发展迅速且应用广泛的重要电极材料，由于大多数电化学反应发生在导电高聚物／金属和导电高聚物／溶液界面，如果能获得其界面结构的信息，将对导电高聚物表面所发生的电化学反应以及导电高聚物的聚合、降解的机理研究有极大的帮助。但无论是常规电化学技术还是一般光谱电化学技术都难于得到有关界面结构的信息，因为通常情况下较强的导电高聚物膜本体的信号将“淹没”来自界面的信号。所幸的是表面增强拉曼散射（ＳＥＲ     

导电高聚物聚2,5—二甲基苯胺的化学合成与特性

报道了聚２，５－二甲基苯胺的化学合成，并用标准四探针方法测定其电导率，以ＦＴＩＲ，ＵＶ－Ｖｉｓ吸收光谱，无素分析和ＣＶ法对其性质进行了研究。本征太民的ＰＤＭｅＡｎ能溶于多种有机溶剂，如ＣＨ２Ｃｌ２，ＣＨＣｌ３，ＤＭＳＯ，ＤＭＦ等。     

导电高聚物聚吡啶的电子能带及其结构研究

聚吡啶(简称PPy)易于进行n-型掺杂并使其电导率大大提高,可用于制作高聚物电池的负极,本文将PPy视为准一维体系,采用EHMO/CO方法计算了新合成的导电高分子材料--聚吡啶4种可能构型的电子能带。     

有机聚合物 磁铁的获取途径和分子设计

潜在的有机磁铁有三种获取途径:(1)非Kekule型单体的聚合物;(2)高自旋的多碳烯化合物;(3)电荷转移复合物盐.本文将分别对前两种途径的理论模型和潜在的有机磁铁分子结构特点进行讨论,并列出新设计的一些有机的聚物磁铁的分子结构式.     

梯形高聚物PTL导电机理的研究

本文采用EHMO/CO半经验计算方法,以准一维体系对梯形高聚物聚吩噻嗪(简称PTL)本征态及掺杂态电子能带进行了计算,讨论了PTL的导电机理,提出了当掺杂剂为质子酸时的荷电孤子或极化子导电模型及p-型掺杂时的极化子导电模型。     

导电高聚物聚2，5－二甲基苯胺的化学合成与特性

报道了聚２，５－二甲基苯胺（ＰＤＭｅＡｎ）的化学合成，并用标准四探针方法测定其电导率，以ＦＴＩＲ、ＵＶ－Ｖｉｓ吸收光谱、元素分析和ＣＶ法对其性质进行了研究，ＰＤＭｅＡｎ的结构与聚苯胺和聚２，５－二甲氧基苯胺的结构类似，是由其单元通过氮原子（Ｎ）在对位上键合而成，本征态的ＰＤＭｅＡｎ能溶于多种有机溶剂，如ＣＨ２Ｃｌ２、ＣＨＣｌ３、ＤＭＳＯ、ＤＭＦ等。     

单分子导电性质的研究进展

介绍了测量单个有机分子导电性质的一些进展,包括分子的尺寸效应、官能团效应、分子与电极的接触效应等,以及分子逻辑器件的初步研究.     

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。     

高模量高强度聚合物的分子设计与加工技术

对高模量高强度聚合物材料的结构与其力学性能的关系,以及近年来在这方面研究中出现的一些新的加工手段进行了介绍。     

导电聚合物

导电聚合物是20世纪70年代发展起来的一个研究领域,因其诱人的应用前景受到广泛重视,本文介绍了导电聚合物的发展和发展历史,综述了导电聚合物的结构和掺杂特征,制造方法,电导和电化学特性及其本征态共轭聚合物的光电特性,对导电聚合物当前的研究热点和应用前景进行了讨论。     

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。     

可溶性导电高分子的合成

本文以聚乙炔类导电高分子为重点简要地综述了可溶性导电高分子的合成与研究现状。     

Electrochemical Post‐Functionalization of Conducting Polymers

This article summarizes recent progress in the post‐functionalization of conjugated polymers by electrochemical methods. These electrochemical polymer reactions typically proceed via electrochemical doping of a conjugated polymer film, followed by chemical transformation. Examples include the quantitative oxidative fluorination of polyfluorenes and oxidative halogenation of polythiophenes, as well as the reductive hydrogenation of polyfluorenones. The degree of functionalization, otherwise known as the reaction ratio, can be controlled by varying the charge passed through the polymer, allowing the optoelectronic properties of the conjugated polymers to be tailored. Wireless bipolar electrodes with an in‐plane potential distribution are also useful with regard to the electrochemical doping and reaction of conjugated polymers and allow the synthesis of films exhibiting composition gradients. Such bipolar electrochemistry can induce multiple reaction sites during electrochemical polymer reactions.

     

Direct Writing of Conducting Polymers

Described herein is a new printing method—direct writing of conducting polymers (CPs)—based on pipette‐tip localized continuous electrochemical growth. A single barrel micropipette containing a metal wire (Pt) is filled with a mixture of monomer, supporting electrolyte, and an appropriate solvent. A droplet at the tip of the pipette contacts the substrate, which becomes the working electrode of a micro‐electrochemical cell confined to the tip droplet and the pipette. The metallic wire in the pipette acts as both counter and reference electrode. Electropolymerization forms the CP on the working electrode in a pattern controlled by the movement of the pipette. In this study, various width poly(pyrrole) 2D and 3D structures are extruded and characterized in terms of microcyclic voltammetry, Raman spectroscopy, and scanning electron microscopy.

     

Design and Control of Perylene Supramolecular Polymers through Imide Substitutions

The number and type of new supramolecular polymer (SMP) systems have increased rapidly in recent years. Some of the key challenges faced for these novel systems include gaining full control over the mode of self-assembly, the creation of novel architectures and exploring functionality. Here, we provide a critical overview of approaches related to perylene-based SMPs and discuss progress to exert control over these potentially important SMPs through chemical modification of the imide substituents. Imide substitutions affect self-assembly behaviour orthogonally to the intrinsic optoelectronic properties of the perylene core, making for a valuable approach to tune SMP properties. Several recent approaches are therefore highlighted, with a focus on controlling 1) morphology, 2) H- or J- aggregation, and 3) mechanism of growth and degree of aggregation using thermodynamic and kinetic control. Areas of potential future exploration and application of these functional SMPs are also explored.     

本征导电聚合物的智能性

在化学掺杂或电化学掺杂过程中，性质发生可逆性变化的本征导电聚合物是一种潜在的智能材料，可望实现或部分实现传感、处理和执竽功能，适于制成电机执行器、智能窗、化学分离与释放体系、传感器和非线性光学器件等。     

L-Dopa Synthesis on Conducting Polymers

With regards to the synthesis of L-Dopa (l-3,4-dihydroxy phenylalanine) two types of biosensors were designed by immobilizing tyrosinase on conducting polymers; polypyrrole (PPy) and poly(3,4-ethylenedioxythiophene) (PEDOT). PPy and PEDOT were synthesized electrochemically and tyrosinase immobilized by entrapment during electropolymerization. The kinetic parameters of the designed biosensors, maximum reaction rate of the enzyme (V_max) and Michaelis Menten constant (K_m) were determined. V_max were found as 0.013 for PPy matrix and 0.041 μ mol/min.electrode for PEDOT matrix. K_m values were determined as 3.7 and 5.2mM for PPy and PEDOT matrices respectively. Calibration curves for enzyme activity vs. substrate concentration were drawn for the range of 0.8 to 2.5 mM L-Tyrosine. Optimum temperature and pH, operational and shelf life stabilities of immobilized enzyme were also examined.