聚苯胺的合成与性能研究——介绍一个化学综合实验

考察化学法和电化学法两种方法制备的聚苯胺的电化学活性差别;研究聚苯胺的催化性能及气敏性能。通过有关聚苯胺的系列实验学习,让学生了解导电聚合物的性能及其在化学传感器中的应用及前景。     

聚苯胺微／纳米结构及其应用

导电聚合物微／纳米结构保留了轻质、类金属电导率和可逆化学和电化学特性,又具有纳米材料的高比表面积、尺寸和量子效应,它在电子器件、储能器件、传感器件等领域具有广泛的技术应用前景。其中,由于聚苯胺的制备方法简单、原料易得和独特的质子酸掺杂和脱掺杂机制,使聚苯胺微／纳米结构的可控制备及其应用研究已成为当前导电聚合物研究的热点...     

共轭聚合物复合材料的结构和性能

对聚苯胺、聚吡啶等共轭聚合物与非导电聚合物材料的复合体系的结构和性能进行了综述。不同方法制备的复合材料在结构和性能上各有特点。一般共轭聚合物与非导电高分子材料相容性差、尤其是低极性高分了。     

DOPA-PSPMA仿生共聚物综合探究性实验研究

为提高本科学生的创新创业能力,通过高分子化学实验教学使学生深入了解仿生共聚物的制备及性能的相关知识,设计了综合探究性实验。通过原子转移自由基聚合法制备仿生共聚物,并将其修饰在多种材料表面。采用X射线光电子能谱、扫描电子显微镜、生物显微镜分别对修饰材料进行表征。该实验通过共聚物的制备使学生掌握高分子化学中活性可控自由基聚合制备共聚物的方法;掌握仿生共聚物设计及构筑方法;使学生学习科研仪器的操作方法,切实提高学生的实践能力。该实验重复性好、创新性及拓展性强,将共聚物设计制备及应用有机结合,适用于高分子专业本科生综合探究性实验。     

聚苯胺的电化学合成实验

本文将新型有机固体导电材料聚苯胺的电化学合成引入大学高分子化学实验。合成方法简便易行。把高分子化学的新进展引入到高年级教学，有助于扩展学生的知识面。聚苯胺在外加电场变化时会发生颜色变化，使整个实验过程生动有趣，也可以用于课堂演示教学。     

聚苯胺的图形化沉积

自1976年发现第一个有机聚合物聚乙炔掺杂后具有类似金属的导电性以来，先后发现了聚吡咯、聚噻吩和聚苯胺(PAn)等导电聚合物，其中聚苯胺以其合成方法简单、稳定性好、较高的电导率及良好的电化学性能等被预言为是最有应用前景的导电高分子材料之一。近年来，随着导电聚合物研究的广泛开展和不断深入，     

石墨烯-聚苯胺杂化超级电容器电极材料

聚苯胺是一类具有超高比电容的导电高分子材料, 利用其与石墨烯的协同效应, 改善各自的固有缺点, 可以制得高性能的超级电容器. 本文综述了石墨烯-聚苯胺杂化电极材料的制备方法和石墨烯表面性质对电极材料电化学性能的影响, 讨论了优化杂化电极的结构与性能.     

导电高分子-金属氧化物复合材料用作锂离子电池正极材料的研究现状

随着人类社会对能源需求量的增大,高效储能材料的开发备受关注。导电高分子-金属氧化物复合材料具备了作为储能器件正极材料的诸多特质,故成为了相关研究领域的热点方向之一。本文以聚苯胺(PAni)和聚吡咯(PPy)为例,综述了近年来导电高分子-金属氧化物复合材料用作锂离子电池正极材料方面的研究进展。概述了此类材料中各组分如何通过有机/无机协同作用实现材料电化学性能的提升,介绍了此类材料的制备方法,结构特点及常用表征手段,以及材料的电化学性能特征。     

金属-有机框架作为超级电容器电极材料研究的综合性实验设计

介绍了一个综合性实验——金属-有机框架作为超级电容器电极材料的研究。实验内容包括金属有机框架的制备、单晶结构表征与电化学性能测试等主要内容。学生通过具体实验操作、电化学工作站使用、结构分析及数据处理等步骤，可充分了解目前热门的前沿领域，也可以对实验内容涉及的知识体系进行学习、归纳。本实验综合了无机化学、分析化学和物理化学的相关知识点与实验操作，可作为高年级学生开放实验进行开设。     

基于聚酰亚胺薄膜的综合实验项目设计

以高性能聚合物材料聚酰亚胺(Polyimide,PI)为例，将目前新材料行业亟待解决的“卡脖子”问题引入本科教学中，设计了一个高分子化学综合性实验项目——聚酰亚胺薄膜制备及性能测试。项目包括高分子材料的设计、化合物合成、薄膜加工、薄膜性能表征等实验内容，涵盖分子模拟计算、图谱分析、聚合物结构与性能关系等诸多知识点。通过实验教学，让学生了解我国新材料领域的发展动态，训练其对化学及材料学科知识的综合运用能力，培养科研素养、创新意识及使命担当精神。     

α-Amino acid derived enaminones and their application in the synthesis of N-protected methyl 5-substituted-4-hydroxypyrrole-3-carboxylates and other heterocycles

A new and simple synthesis of novel N-protected methyl 5-substituted-4-hydroxypyrrole-3-carboxylates, which exist in equilibrium with their 4-oxo tautomers, has been developed in two steps starting from N-protected α-amino acids. The key intermediates are enaminones, which can also be isolated, characterized, and used for the construction of other functionalized heterocycles, before they spontaneously decompose to pyrrole products. 4-Hydroxypyrroles are prone to partial aerial oxidation but can be efficiently alkylated or reduced to stable polysubstituted pyrrolidine derivatives.     

Specific intramolecular aromatic CH insertion of diazosulfonamides

The chemoselectivity in the intramolecular CH insertion of various diazosulfonamides has been experimentally studied. The results reveal that the aliphatic 1,4-, 1,5-, or 1,6-C(sp³)?H insertions of diazosulfonamides are not accessible, while the aromatic 1,5-C(sp²)?H insertion can be realized specifically by adjusting the diazo-adjacent group. In addition, the general chemoselectivities in the intramolecular CH insertions of diazosulfonyl compounds are summarized. Generally, diazosulfones undergo both aromatic 1,5-C(sp²)?H and aliphatic 1,5- and 1,6-C(sp³)?H insertions, while diazosulfonates undergo aliphatic 1,5- and 1,6-C(sp³)?H insertions. However, diazosulfonamides only undergo aromatic 1,5-C(sp²)?H insertion.     

N-Heterocyclic carbene-palladacyclic complexes: synthesis,characterization and their applications in the C-N coupling and α-arylation of ketones using aryl chlorides

N-Heterocyclic carbene-palladacyclic complexes 3 were successfully achieved in a one-pot procedure under mild conditions. The structure of 3a was unambiguously confirmed by X-ray single crystal diffraction and it was an active catalyst in the Buchwald-Hartwig amination and α-arylation of ketones even at very low catalyst loadings (0.01?mol%).     

Iodine-mediated oxidative Pictet-Spengler reaction using terminal alkyne as the 2-oxoaldehyde surrogate for the synthesis of 1-aroyl-β-carbolines and fused-nitrogen heterocycles

An efficient iodine-mediated oxidative Pictet-Spengler reaction in dimethyl sulphoxide (DMSO) using terminal alkynes as the 2-oxoaldehyde surrogate for the synthesis of aryl (9H-pyrido[3,4-b]indol-1-yl)methanones is described. The scope of the protocol includes the total synthesis of Fascaplysin, Eudistomins Y₁ and Y₂. The methodology is extended for preparing pyrrolo[1,2-a]-quinoxaline and indolo[1,5-a]quinoxaline derivatives. The utility of 1-aroyl-β-carbolines was demonstrated by performing palladium-catalyzed β-carboline directed ortho-C(sp2)-H functionalization of the phenyl ring with thiomethyl (SMe) group using DMSO as source and for accessing 4-aryl-canthin-6-ones.     

Facile synthesis of bicyclic 1-arylpyrazol-5-ones

In this Letter, we described a facile method for constructing fused bicyclic 1-arylpyrazol-5-one ring system. We employed various methylene-containing carboxylic acids as the substrates and proved that the pyrazolone ring closure requires activated methylene group in intermediate II. Accordingly, a series of structurally diversified, fused bicyclic 1-arylpyrazol-5-ones was prepared in moderate to high yields using the requisite substrates.     

Synthesis of pyrrolo[1,2-a]pyrazines and pyrazino[1,2-a]indoles by Curtius reaction in Morita-Baylis-Hillman derivatives

Synthesis of substituted pyrrolo[1,2-a]pyrazines and pyrazino[1,2-a]indoles from the Morita-Baylis-Hillman derivatives of acrylates via saponification followed by Curtius reaction is described.     

正丁胺对激光染料荧光谱影响的研究

用正丁胺作为碳源,采用射频辉光放电制备碳膜,选用激光染料R6G和聚乙二醇混合液作为蒸气源,采用单源热蒸发,在蒸发室与染料同时沉积得到混合膜,用拉曼光谱和红外光谱分析了碳膜的结构和键合方式,分析表明:碳膜中存在胺基团和氢原子.混合膜的荧光谱测量结果表明,认为正丁胺对染料荧光谱的影响是因为胺基和氢原子的存在.     

Cu0-catalysed 1,3-dipolar cycloadditions of α-amino acid derived N,N-cyclic azomethine imines to ynones

A series of 20 CuAIAC reactions between eight 4-acylamino substituted pyrazolidine-3-one-1-azomethine imines and four terminal ynones were performed using Cu⁰ as catalyst. The corresponding fluorescent cycloadducts were obtained in very high yields upon simple workup. Thus, Cu-metal turned out to be a better catalyst than Cu^I in terms of yield and ease of isolation. Availability of azomethine imines, mild reaction conditions, and simple workup enable a “click” access to libraries of densely substituted 2,3-dihydro-1H,5H-pyrazolo[1,2-a]pyrazol-1-ones. Reactivity of differently substituted dipoles was evaluated experimentally and by quantum chemical methods (DFT).     

Synthesis and antioxidative/anti-inflammatory activity of novel fullerene–polyamine conjugates

(E)-4-(Fullerenopyrrolidin-1-yl)-3-methylbut-2-enoic acid and its corresponding succinimidyl ester, readily obtained through Prato-type modification of C₆₀, were used for the selective N-acylation of polyamines. The thus obtained conjugates were evaluated for their antioxidative and anti-inflammatory activity and their cytotoxicity was determined. Members of this family of compounds showed interesting anti-lipid peroxidation, anti-lipoxygenase and anti-inflammatory activity and comparable cytocompatibility to spermidine.