双（N—苯基—3—咔唑基）甲苯碘盐的合成

双（Ｎ┐苯基┐３┐咔唑基）甲苯碘盐的合成李笃信＊郭自强兰卫东（山西大学化学系太原０３０００６）关键词苯基咔唑甲苯碘盐，有机光电导体，敏化剂，合成１９９７－１０－２７收稿，１９９８－０３－１３修回山西省自然科学基金资助项目有机光电导体简称ＯＰＣ，因其具...     

有机光电导体增感剂N,N'-二乙基-3,3'-二吩噻嗪基-甲苯基碘鎓盐的合成及光敏性研究

有机光电导体在静电复印、全息记录、信息存储等方面得到实际应用.特别是半导体激光器的研制成功,人们对研究适于近红外(780-850 nm)的有机光电导材料越来越感兴趣。它在半导体激光打印,影像印刷等应用中具有广阔的前景。     

富勒烯掺杂有机光电导材料的光电导性

富勒烯掺杂有机光电导材料的光电导性徐铸德，陈万喜，冷拥军，许小平，李文铸（浙江大学化学系，物理系，杭州，３１００２７）汪茫（浙江大学高分子科学与工程学系）关键词富勒烯，光化学，光物理，光电导体光电导材料在现代静电成像领域中有极广泛的应用，近年来，有机...     

多硫1,2—二硫醇烯配合物的的研究进展

综述了近年来在新型多硫１,２－二硫醇烯配合物的合成,结构和性质方面的研究进展以及这些配合物作为分子导体,超导体,磁性材料和光电功能材料的应用前景。     

氟代⊥酰亚胺掺杂PVK薄膜的结构特性和光电导性能

采用一种新型的有机电子受体 N,N′-二 (五氟代苯基 ) - 3,4 ,9,10 -⊥四羧基二酰亚胺(DFPP) ,与空穴传输材料聚乙烯基咔唑 (PVK)掺杂复合 ,制备了单层有机光电导体 ,发现无论是在充正电还是在充负电情况下 ,该复合光电导体均表现出十分优异的光电导性能。结合 DSC、UV- Vis吸收、XPS和循环伏安等测试手段研究了 DFPP掺杂的 PVK薄膜的凝聚态、光学和电学性质 ,发现 DFPP与PVK形成了给体 -受体 (D- A)复合物 ,而且 DFPP分子可在薄膜中形成电子传输通道 ,由此使 DFPP掺杂 PVK薄膜具有高的光致激子分离效率和良好的电子传输能力     

氟代苝酰亚胺掺杂PVK薄膜的结构特性和光电导性能

采用一种新型的有机电子受体N,N’-二(五氟代苯基)-3,4,9,10-菲四羧基二酰亚胺(DFPP)．与空穴传输材料聚乙烯基咔唑(PVK)掺杂复合．制备了单层有机光电导体．发现无论是在充正电还是在充负电情况下．该复合光电导体均表现出十分优异的光电导性能。结合DSC、UV—Vis吸收、XPS和循环伏安等测试手段研究了DFPP掺杂的PVK薄膜的凝聚态、光学和电学性质．发现DFPP与PVK形成了给体-受体(D—A)复合物,而且DFPP分子可在薄膜中形成电子传输通通道,由此使DFPP掺杂PVK薄膜具有高的光致激子分离效率和良好的电子传输能力。     

碟形金属络合物液晶的硬核构象与相转变

由于碟形液晶可望开发成为液晶光电换能、液晶有机导体及液晶磁性材料等,而引起了学术界深入的研究。其中的一类碟形金属络合物是对烷氧基苯基取代的β-二酮类碟形铜离     

有机共轭分子自组装方法

本文综述了有机共轭分子自组装方法的最新研究进展,从有机共轭分子的合成、自组装方法、光电性质及应用等方面进行了阐述,着重阐述了适用于有机共轭分子的各种自组装方法。认为它们的自组装在有机光电材料或器件方面具有广阔的应用前景及潜在的应用价值。     

聚甲基丙烯酸甲酯Langmuir—Blodgett复合膜及其在光电导体中…

制备了聚甲基丙烯酸甲酯（ＰＭＭＡ）ＬＢ复合膜，将其作为阻挡层首次应用于机能分离型光电导体领域。从π－Ａ曲线发现ＰＭＭＡ单分子膜具有表面压力的各向异性和松弛特性。ＴＥＭ照片显示，ＰＭＭＡ分子链在复合膜中有序排列。转移比、ＵＶ和ＸＰＳ研究表明，复合膜沉积均匀。以ＰＭＭＡ－ＬＢ复合膜作为阻挡层的光电导体表面充电电位Ｖ０＝１５１８Ｖ，光照１ｓ后的光衰百分率△Ｖ１ｓ＝５０．１６％，半衰期ｔ１／２＝０．９３ｓ     

有机导电高聚物

近年来,有机导体这门新兴的材料科学由于其理论意义和应用前景越来越受到人们的重视。多种导电有机化合物被合成出来。按照结构特征,这些有机导体可分为两大类:一是分子复合物,一是具有共轭结构的高聚物。第一类如 TCNQ-TTF等复合物类型的小分子有     

二氧化碳和丙烯直接合成甲基丙烯酸的NiPMo/TiO2催化剂的研究

用溶胶-凝胶法以磷钼酸(MPA)的镍盐溶液水解钛酸四丁酯制备了NiPMo/TiO2催化剂.使用ICP、 XRD、 TG-DTA、 IR、 TPD-MS和微反应技术研究了催化剂的化学组成、热稳定性、化学吸附性质和催化反应性能.杂多钼酸盐与TiO2通过O2-在TiO2表面发生了键合.在623 K下,杂多阴离子仍保持原有的Keggin结构.CO2在Lewis酸位Ni(Ⅱ)和Lewis碱位Ni-O-Mo的桥氧协同作用下生成CO2卧式吸附态Ni(Ⅱ)←O-(CO)←(O--Ni).丙烯有多种吸附态在催化剂上吸附.在563 K、 1 MPa和空速1500 h-1的反应条件下,丙烯的摩尔转化率为3.2%,产物MAA选择性为95%.     

Synthesis of 1-benzyloxypyrazin-2(1H)-one derivatives

Different approaches for the synthesis of 1-benzyloxypyrazin-2(1H)-one derivatives from simple amino acids have been investigated. A library of 33 precursors for the preparation of N-hydroxy pyrazinones was obtained in moderate to good yields.     

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.     

A general and convenient synthesis of 4-(tosylmethyl)semicarbazones and their use in amidoalkylation of hydrogen,heteroatom, and carbon nucleophiles

A general synthesis of previously unknown semicarbazone-based α-amidoalkylating reagents, 4-(tosylmethyl)semicarbazones, has been developed. The synthesis involved three-component condensation of semicarbazones of aliphatic or aromatic aldehydes with the same or other aldehydes and p-toluenesulfinic acid. The scope and limitations of this reaction were investigated. The compounds obtained were demonstrated to be an efficient α-(4-semicarbazono)alkylating agents. They were reacted with H- (sodium borohydride), O- (sodium methylate), S- (sodium phenylthiolate), N- (pyrrolidine, sodium succinimide), P- (trialkyl phosphites), and C-nucleophiles (sodium diethyl malonate) to give the corresponding products of the tosyl group substitution, 4-substituted semicarbazones, including analogues of nitrofurazone. Among the prepared compounds tested in vitro for antibacterial and antifungal activity, three nitrofuryl-containing semicarbazones exhibited high biological activities with minimum inhibitory concentration (MIC) values of 8–32 μg/mL.     

Synthesis of novel chiral bidentate hydroxyalkyl-N-heterocyclic carbene ligands and their application in palladium-catalyzed Mizoroki–Heck couplings and asymmetric addition of diethylzinc to benzaldehyde

A small library of new chiral bidentate hydroxyalkyl-imidazolium salts 1 is conveniently synthesized on multi-gram scale from inexpensive and commercially available chiral pool amino acids. The corresponding carbenes, generated by deprotonation of imidazolium salts 1, in combination with palladium(II) chloride were tested in the Mizoroki–Heck coupling reaction. The most significant results in terms of yields and reactivities were achieved with low catalyst loading. The catalytic activities of these imidazolium salts were also investigated in the asymmetric addition of diethylzinc to benzaldehyde. The use of MgO nanoparticles as an additive in conjunction with these ligands played a crucial role in increasing the efficiency of these reactions.     

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%).     

Toward new camptothecins. Part 6: Synthesis of crucial ketones and their use in Friedländer reaction

In the context of the preparation of camptothecin and luotonin A analogs, the synthesis of some key keto-precursors and their use in Friedländer condensation are described. This paper also focuses on the stability of these keto intermediates and emphasizes the major differences between indolizinones and pyrroloquinazolinones series. Noteworthy is also the report of some original structures isolated as by-products of some experiments.     

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.