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1.
李洪启  宋燕西  彭家建  邱化玉 《有机化学》2007,27(10):1220-1227
简要介绍了含有四硫富瓦烯(TTF)单元的大环化合物的分类, 概括了各类含四硫富瓦烯大环化合物的合成方法, 主要包括含有1,3-二硫杂环戊烯-2-硫酮单元的大环化合物在亚磷酸三烷基酯参与下的偶合反应, 以及带有氰乙基硫等取代基的预先合成的官能化TTF与二卤代低聚醚的反应. 综述了含四硫富瓦烯大环化合物的电化学性能及其在分子识别方面应用研究的最新进展, 提出了含四硫富瓦烯大环化合物的发展趋势.  相似文献   

2.
The structures of four macrocyclic polyether sulfides have been determined by single crystal x-ray diffraction methods. The compounds studied were 1,4,7-trithia-12-crown-4, 1,4-dithia-15-crown-5, 1,4-dithia-18-crown-6 and 1,10-dithia-18-crown-6. In all four compounds the potential donor sulfur atoms point out of the ring. This causes the rings to be irregularly shaped.  相似文献   

3.
Synthesis, X-ray structure, ring-opening polymerization macrocyclic phenylene sulfides and their role in chemistry and technology of polyarylene sulfides are discussed.  相似文献   

4.
大环化合物色谱固定相分离机理研究的新进展   总被引:1,自引:0,他引:1  
简要介绍了近年来被用于大环化合物色谱固定相保留机理研究的一些新的方法和理论,重点对几种典型大环超分子主体化合物作为色谱固定相对其分离机理研究的近况进行了综述。  相似文献   

5.
金属冠醚的合成进展   总被引:1,自引:0,他引:1  
金属冠醚是一类新型的超分子大环化合物, 它开拓了主客体化学分子识别和超分子化学的全新领域. 综述了近年来金属冠醚的研究成果.  相似文献   

6.
α-Halogeno ethers, sulfides, and amines are reactive compounds which can be used for the formation of new C? C bonds, either as nucleophilic or as electrophilic reagents, or by α-elimination. The use of these compounds in the synthesis of many classes of organic compounds is reviewed.  相似文献   

7.
低温燃料电池非铂催化剂研究进展   总被引:1,自引:0,他引:1  
张洁  唐水花  廖龙渝  郁卫飞 《催化学报》2013,34(6):1051-1065
简要综述了近年来低温燃料电池阳极和阴极催化剂的研究进展.阳极催化剂主要介绍了金属碳化物、Pd合金以及钙钛矿型氧化物三种,讨论了阳极催化剂对燃料氧化过程的催化活性和抗CO中毒能力;阴极催化剂则重点介绍了过渡金属大环化合物、氮化物以及氧化物,并较详细地阐述了过渡金属大环化合物的反应活性中心、金属-载体相互作用以及化合物制备条件.由于阴极非铂催化剂存在制备过程较复杂、中间产物过氧化物易破坏催化剂结构等问题,仍需探索新型的非铂催化剂.  相似文献   

8.
分子印迹技术(Molecular Imprinting Technology,MIT)因其预定性、专一性和适用性而被广泛应用于色谱分离、固相萃取、药物分析以及手性识别等领域。近些年来,研究者们将大环化合物引入MIT中,在增加识别位点的同时,有效改善了印迹聚合物材料的结构和性能,提高了对模板分子的选择性识别能力。本文重点综述了近10年来环糊精、杯芳烃、柱芳烃、冠醚和葫芦脲等大环化合物在分子印迹技术中的研究进展及应用,并对该领域的发展前景进行了展望。  相似文献   

9.
Azobenzene derivatives due to their photo- and electroactive properties are an important group of compounds finding applications in diverse fields. Due to the possibility of controlling the trans–cis isomerization, azo-bearing structures are ideal building blocks for development of e.g. nanomaterials, smart polymers, molecular containers, photoswitches, and sensors. Important role play also macrocyclic compounds well known for their interesting binding properties. In this article selected macrocyclic compounds bearing azo group(s) are comprehensively described. Here, the relationship between compounds’ structure and their properties (as e.g. ability to guest complexation, supramolecular structure formation, switching and motion) is reviewed.  相似文献   

10.
肉类香味的合成香料   总被引:4,自引:0,他引:4  
黄荣初  王兴凤 《有机化学》1983,3(3):175-179
本文简略地介绍近年来肉味香的合成香料的研究进展,结构特点,香味特性及合成。这些化合物包括含硫氨基酸,硫醇,硫醚,二硫醚,含氮、氧、硫的杂环化合物,以及某些脂肪族的饱和及不饱和的羰基化合物等。  相似文献   

11.
A method has been developed for the directed synthesis of macrocyclic phenylene sulfides with 4–8 phenylene sulfide fragments, by condensation of dihaloaromatic compounds of various types with sodium sulfide or dithiophenate. A combination of this method with high dilution techniques has afforded pure macrocycles in high yields, and the macrocycle with six phenylene sulfide fragments in yields as high as 73%.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 4, pp. 854–858, April, 1990.  相似文献   

12.
Recent advances in the aza-Wittig reaction of phosphazene derivatives with several carbonyl compounds are reviewed. Phosphazenes afford inter- and intramolecular aza-Wittig reactions with different compounds such as aldehydes, ketones, esters, thioesters, amides, anhydrides and sulfimides. One of the most important applications of this reaction is the synthesis of a wide range of acyclic and heterocyclic compounds, ranging from simple monocyclic compounds to complex polycyclic and macrocyclic systems.  相似文献   

13.
Abstract

Macrocyclic systems containing phosphine. phosphoryl or thiophosphoryl functions in the ring demonstrate high ability to complex metal ions Complexed structures of this type show interesting Fatalytic properties and can be used in homogenous and heterogenous catalysis[1,2] Macrocyclic compounds containg phosphorus are also useful as complexing agents for ammonlum salts. anions. etc [3,4] Generally three types of reactions are used to synthesize phosphorus containing macrocyclic compounds the cyclocondensation, the ring opening reaction and the reaction with metal as a matrix[5]. We have devoloped a new procedure for the synthesis of the title systems of different sizes and of different P and S contents It is based on a double conjugate addition of dithiolates to divlnyl phosphine oxides and sulfides and makes use of the so-called “cesium effect”.  相似文献   

14.
双核大环配合物在模拟金属蛋白活化中心,键合与活化小分子及作为双功能催化剂方面具有广阔应用前景。本文就西夫碱型、串连型、具有“软”、“硬”空腔的单大环、双大环及大多环双核配体及其配合物的性质和它们在仿生方面的研究进展进行综述报道。  相似文献   

15.
The applications of resorcinarene derivatives in modern separation techniques including high performance liquid chromatography (HPLC), gas chromatography (GC), capillary electrophoresis (CE), ion chromatrography (IC), and liquid membranes are reviewed in this paper. Resorcinarenes are macrocyclic compounds which can be modified with various substituents on upper and lower rims to provide specific functionality and selectivity. The derivatives can be adsorbed or covalently bound to the stationary phase of HPLC, GC, and IC, or used as pseudo-stationary phase in CE to separate organic or inorganic species. They have been tested as carriers to selectively transfer species from source phase to receiving phase in bulk liquid membranes, supported liquid membranes, and polymer inclusion membranes. These broad applications of resorcinarene-based macrocyclic ligands indicate that they are a promising class of compounds that are worthwhile to be explored in both synthesis and separation applications.  相似文献   

16.
The possibility to modulate molecules reversibly by light has been fascinating chemists early on. One of the most powerful photochromic classes of compounds are azobenzenes, which have been incorporated in multiple molecular systems to alter their functionality. Recently, the incorporation of azobenzenes into macrocyclic scaffolds, azobenzenophanes, revealed a novel aspect of this interesting photoswitch. Especially, the build-in of more than one azobenzene moiety into the structure creates photochromic compounds with multiple accessible states. The cyclic arrangement also leads to a change in the photochemical properties, which offer new opportunities for functional molecular devices. In this article the synthesis as well as the photochemistry including applications of macrocyclic azobenzenes, containing more than one azobenzene unit, oligoazobenzenophanes, are reviewed.  相似文献   

17.
何祖政  刘慧 《化学通报》2021,84(5):426-432,425
药物研发的过程中,越来越多的化合物存在溶解性低的问题,因此提高药物溶解度是目前迫切需要解决的问题.环糊精、杯芳烃、葫芦脲等大环化合物可以通过主客体作用形成包合物从而增加难溶性药物的水溶性.本文介绍了几种大环化合物在药物增溶领域的应用.首先,基于大环化合物化学结构和空腔属性的差异,列举了它们可增溶药物的种类和范围;其次,...  相似文献   

18.
Phthalocyanines (Pc) and related macrocycles in combination with organic or inorganic macromolecules are reviewed. From the structural point of view, the macrocyclic compounds in macromolecular phases are subdivided into five types. Syntheses are described in detail, and characteristic experimental procedures are given. The properties of the materials are discussed: conductivity and photoconductivity, electrical charge/discharge, electrocatalytic reductions, photocatalytic reductions/oxidations of and at thin film electrodes, catalytic and photocatalytic oxidations, photoinduced electron transfer.  相似文献   

19.
手性溶解剂在NMR法测定对映体比率和绝对构型的研究进展   总被引:1,自引:0,他引:1  
综述了手性溶解剂在NMR法测定对映体比率及绝对构型的研究进展.按照手性溶解剂的结构类型,包括胺、酰胺、羧酸、醇、氨基醇、大环化合物,对手性溶解剂的结构特点与手性识别性能进行了详细的介绍.  相似文献   

20.
The ability to extend the polymerizations of thiyl radical propagation to be regulated by existing controlled methods would be highly desirable, yet remained very challenging to achieve because the thiyl radicals still cannot be reversibly controlled by these methods. In this article, we reported a novel strategy that could enable the radical ring-opening polymerization of macrocyclic allylic sulfides, wherein propagating specie is thiyl radical, to be controlled by reversible addition–fragmentation chain transfer (RAFT) agents. The key to the success of this strategy is the propagating thiyl radical can undergo desulfurization with isocyanide and generate a stabilized alkyl radical for reversible control. Systematic optimization of the reaction conditions allowed good control over the polymerization, leading to the formation of polymers with well-defined architectures, exemplified by the radical block copolymerization of macrocyclic allylic sulfides and vinyl monomers and the incorporation of sequence-defined segments into the polymer backbone. This work represents a significant step toward directly enabling the polymerizations of heteroatom-centered radical propagation to be regulated by existing reversible-deactivation radical polymerization techniques.  相似文献   

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