可充锂电池醌类化合物电极材料

醌类化合物电极材料具有理论比容量高、结构可设计、成本低廉和绿色可持续等优点,被认为是可充锂电池理想的电极材料。本文介绍了醌类化合物电极材料的分类及其结构特点、电化学工作原理及其电化学性能,对醌类化合物的发展、面临的问题等方面进行了概括,探讨了提高该类电极材料电化学性能的方法,并对醌类化合物电极材料的发展方向进行了展望。     

具有长侧链结构苯醌类化合物的合成及其成膜性质研究

应用经过改进的自由基烷基化新方法,合成了一系列的具有长侧链结构的苯醌类化合物。研究了这类化合物形成LB膜的性能和规律。讨论了醌类化合物的成膜性能与生物活性之间的关系。     

二芳基乙烯类化合物用作光开关的最新研究

本文在综述二芳基乙烯类化合物各种性能的基础上,重点介绍了二芳基乙烯类化合物作为荧光光控开关、荧光共振能量转移、光致变色电开关、光致变色磁开关、光致变色液晶开关和多功能光致变色开关的最新发展动态,以及二芳基乙烯类化合物的形态对光开关性能的影响。最后对未来光存储材料的研究趋势作了展望。     

酞菁类光电材料研究新进展

酞菁类化合物具有优异的光电响应性能,是光电材料领域最活跃的研究方向之一.评述了酞菁类化合物近几年在不同领域的研究进展,分析总结了酞菁和取代基酞菁的分子结构、晶体形态对光伏材料、薄膜半导体材料、液晶材料、光导材料和电致发光材料等应用性能的影响以及目前存在的问题,最后对酞菁类光电材料的研究和发展前景进行了展望.     

硅芴类化合物的合成及应用研究进展

近年来,芴类结构9-位为硅桥联的硅芴类化合物以其独特的电子结构和光电性能受到研究者们越来越多的关注,这类化合物在有机发光二极管(OLED)、聚合物太阳能电池(PSC)、有机场效应管(OFET)等光电功能材料领域有广泛的应用前景。本文主要对硅芴类化合物的合成方法、结构修饰、性能及应用研究的最新进展进行了综述。     

4—氟—3,6—二氯哒嗪合成新方法

氟代哒嗪类化合物与有一定生理活性的氟代嘧啶类化合物有着同分异构的关系。而4-氟-3,6-二氯哒嗪又是合成其它药物的重要中间体。1984年田官荣报道了4-氟-3,6-二氯哒嗪的合成及同亲核试剂的反应性能和同类化合物     

胍类催化剂

胍类化合物是一种有机强碱，在生理条件下处于完全质子化状态，在催化有机酸碱反应时，催化性能明显优于无机碱和其它有机碱催化剂。此外，经修饰后的胍类化合物可以用于不对称催化；如果对其进行生理模拟，又可以用于酶催化反应。本文主要对胍类化合物所催化的反应进行介绍。     

相转移催化反应研究 V: 利用^1^4C标记法研究取代苯乙烯及α-芳代苯乙烯与二溴卡宾反应动力学

本文应用放射性计数进行反应物及产物的定量测定, 比较了一些冠醚类相转移催化剂的性能. 发现新型氮杂冠醚在催化二溴卡宾与1,1-二苯乙烯加成反应时有最好的催化性能. 本文还测定了取代苯乙烯、α-芳代苯乙烯类化合物与二溴卡宾反应的相对速率常数, 并通过线性相关分析, 比较了两类化合物与二溴卡宾反应特性常数的差别, 对α-取代苯乙烯中取代基R的性质和相对速率常数作了比较.     

噁唑类化合物合成研究新进展

含N和O原子的噁唑环是十分重要的五元杂环,其特殊的结构使噁唑类化合物表现出许多独特的性能和生物活性,在医药、农药、材料等多方面具有广阔的潜在应用.因此,噁唑类化合物的合成备受关注,相关研究众多,发展迅速.根据我们唑类的研究工作,并参考国内外近5年文献,系统地综述了噁唑类化合物,包括噁唑、噁唑啉、噁唑烷酮、稠环噁唑类等的合成研究近况.     

芴类化合物的研究新进展

芴及其衍生物是一类重要的具有刚性平面联苯结构的化合物,分子内含有较大的共轭体系,这种特殊的刚性稠环结构使芴类化合物表现出许多独特的光电性能及生物活性,在光电材料、医药等多领域具有潜在的广泛应用.更为重要的是芴类化合物易于进行结构修饰,在芴环上可方便地引入各种功能基,芴类衍生物的合成及其开拓芴类化合物潜在的新用途,成为近些年来十分活跃的研究领域,且发展迅速.结合自己的工作,参考国内外文献,全面综述了芴类化合物在有机电致发光材料、双光子吸收材料、光致变色材料、太阳能电池材料和生物医药等领域的研究与开发新进展,并对其发展趋势作了展望.     

具有长侧碳链的苯醌类化合物在LB膜上的电化学行为

用LB膜技术将含有长侧碳链的泛醌或质体醌类似物转移到导电玻璃上，用循环伏安法研究了它们的电化学行为．发现醌环上的取代基对其电化学行为有明显影响，提出了泛醌类似物和质体醌类似物在LB膜上的具体电化学过程．     

基于四硫富瓦烯衍生物Langmuir-Blodgett膜的研究进展

在简要介绍了Langmuir-Blodgett (LB)膜的基础上, 主要依据制备LB膜的四硫富瓦烯(TTF)衍生物化学结构的不同, 概括了基于两亲性TTF衍生物、非两亲性TTF衍生物、TTF电荷转移(CT)复合物或盐、以及TTF金属络合物LB膜的制备、结构表征与性能研究进展. 介绍了基于TTF衍生物的LB膜在导电、化学及生物传感器、光学以及磁性方面的应用, 并对基于TTF衍生物LB膜的发展进行了展望.     

半花菁衍生物LB膜的光致荧光特性研究

通过改变半花菁的亲水基团与疏水基团而得到了四种半花菁衍生物 ,利用稳态和时间分辨荧光研究了不同亲水基团与疏水基团对半花菁衍生物光学特性的影响.主要包括半花菁衍生物在LB膜中的聚集特性;亲水基团与疏水基团对半花菁衍生物激发态寿命的影响等.     

A simulation of key aspects of a primary process in natural photosynthesis by a Langmuir-Blodgett film assembly

An advanced Langmuir-Blodgett (LB) assembly designed to replicate the three key aspects (antenna, reaction center, and quinone pool) of a primary process in natural photosynthesis was successfully fabricated by alternate deposition of a mixed monolayer of an artificial reaction center and an antenna pigment and a pure bilayer of a second donor.     

Electrochemical properties of palladium(0) complexes coordinated by quinone derivatives

The polagrophic and cyclic voltammetric behavior of quinone derivatives (Q) and their palladium(0) complexes, (Q)₁ or ²Pd(PPh₃)₂, has been studied. All free quinone derivatives except 5,8,9,10-tetrahydro-1,4-naphthoquinone (THNQ) showed two reversible waves, and all palladium(0) complexes showed irreversible waves. The reduction half-wave potentials for free quinone derivatives lie in the following order:7,7,8,8-tetracyanoquinodimethane (TCNQ) ? p-benzoquinone (BQ) ? 5,8-dihydro-1,4-naphthoquinone (DHNQ) ? 1,4-naphthoquinone (NQ) ? THNQ. The reduction potentials for quinone derivatives shifted toward the negative or coordination to palladium(0). The extents of the shifts depended on the electron-withdrawing ability of the free quinone derivatives. On the other hand, the oxidation potentials for the central palladium(0) in their complexes showed more positive values in comparison with the potential for Pd(PPh₃)₄. However, the oxidation potentials were almost constant for all complexes of the quinone derivatives. On the basis of these facts, the phenomena of charge transfer in the complexes are discussed.     

On Condensation Reactions of Aceanthrene Quinone: Novel Heterocycles

Summary.  It was found that aceanthrene quinone can be condensed with ethylenediamine, 1,2-diaminobenzene, 4-nitro-1,2-diaminobenzene, 1,2-diaminoanthrene quinone, and 4,5,6-triaminopyrimidine derivatives to give aceanthryleno[1,2-b]pyrazine and aceanthryleno[1,2-g]pteridine derivatives. Condensation of aceanthrene quinone with 2-aminoguanidine, semicarbazide, and thiosemicarbazide yielded aceanthryleno[1,2-e]triazines, condensation with 6-hydrazinopyrimidine derivatives gave 3,4-aceanthrylenopyrimido[4,5-c]pyridazines. Reaction of aceanthrene quinone with 2-cyanoethanoic acid hydrazide afforded 10,11-dihydro-10-oxo-aceanthryleno[1,2-c]pyridazine-9-carbonitrile. Treatment of aceanthrene quinone with malononitrile and hydrazine hydrate resulted in 10-aminoaceanthryleno[1,2-c]pyridazine-9-carbonitrile. The antibacterial effects of the prepared compounds were tested. Three of the compounds were tested against 60 cancer types. Received May 6, 2001. Accepted June 5, 2001     

Trapping phosphodiester-quinone methide adducts through in situ lactonization

The goal of in situ modification of DNA via phosphodiester alkylation has led to our design of quinone methide derivatives capable of alkylating dialkyl phosphates. A series of catechol derivatives were investigated to trap the phosphodiester-quinone methide alkylation adduct through in situ lactonization. The catechol derivatives were uniquely capable of characterizable p-quinone methide formation for mechanistic clarity. These investigations revealed that with a highly reactive lactonization group (phenyl ester), lactonization competed with quinone methide formation. Lactone-forming groups of lower reactivity (methyl ester, n-propyl ester, and dimethyl amide) allowed quinone methide formation followed by phosphodiester alkylation; however, they were ineffective at in situ lactonization to drain the phosphodiester alkylation equilibrium to the desired phosphotriester product. The derivatives tethered with lactone-forming functionality of intermediate reactivity (chloro-, trichloro-, and trifluoroethyl esters), allowed quinone methide formation, phosphodiester alkylation, and in situ lactonization to efficiently afford the trapped phosphotriester adduct.     

四硫富瓦烯衍生物/硬脂酸LB膜的导电性研究

报导了14种四硫富瓦烯衍生物／硬脂酸LB膜的导电性，并解释了硬脂酸量和碘蒸气掺杂对LB膜导电性的影响．     

Oxidation of phosphine with quinone and quinoid redox polymers in alcohol solutions of copper

New quinoid redox polymers were obtained by chemical modification of commercial weakly basic anion exchangers with quinone and its derivatives. The redox properties of quinone and quinoid redoxites with respect to phosphine were studied in alcohol solutions of copper complexes.