蛋白质链环和纽结

寻找和合成拓扑新颖结构的蛋白质是目前一个崭新的课题 ,本文介绍了已经发现的M bius蛋白质和蛋白质链环的新奇结构及实验事实     

瓜环的超分子化学研究进展

总结了瓜环化学在分子组装、分子器件、生物化学、药物化学等方面的最新进展.同时,也展现了我们在瓜环化学方面进行的初步的研究.     

常见大环自组装构建分子胶囊

分子胶囊以其独特的分子结构在控制药物释放、催化、材料科学和生物医药等领域具有潜在的应用价值.分子胶囊可由不同的分子模块通过共价键或非共价键构建.着重描述了由常见的大环主体(环糊精、杯芳烃、杯吡咯、卟啉、环三藜芦烯和葫芦脲)通过自组装形成的分子胶囊.这些分子胶囊通过非共价键(氢键、静电作用、疏水作用及范德华力等)连接,使得分子胶囊具有可控的可调节的分子结构.通过这些独特的分子结构,分子胶囊可在溶液或固相中包裹各种各样的有趣的客体.     

超分子化学和分子器件—配位化学的一个前沿领域

重点介绍配位化学在超分子化学和分子器件－一门新学科领域中的研究进展。     

分子工程学学科建设刍议

作为一个化学工作者,我对分子工程学确实有点向往,甚至偏爱。这可能与我长期从事物理化学教学、结构化学科研以及经常考虑学科的作用和发展问题有点关系。1978年科学大会前夕出了一本科普读物《现代科学技术简介》,我在其中介绍“结构化学的概况和动向”时,曾归纳出这个学科的四个动向,其中之一就是分子工程学。     

超分子有机膦大环化合物研究进展

有机膦大环化合物是伴随着大环化学的出现而发展起来的．它们不仅具有多变的结构而且非常稳定;不仅能够包结客体分子,还可以与许多过渡金属形成稳定的配位化合物,在主客体化学以及金属有机催化领域中受到人们的广泛关注．由于其独特的性质,有机膦大环化合物在超分子化学的发展中具有重要的地位．本文主要介绍了近些年有机膦大环化合物研究的新进展及其在超分子化学中的应用．     

基于大环合成受体的超分子纳米阀门

在特定外界刺激下, 修饰于介孔纳米材料表面的超分子纳米阀门可以有效地控制所包封物质如药物模型分子、 抗癌药物分子和寡核酸等生物分子的靶向释放, 在药物释放、 基因转染及传感等领域有广泛的应用前景. 本文结合本课题组的工作, 综述了国内外在基于大环合成受体的超分子纳米阀门体系的化学构筑及功能等方面的研究进展.     

发光性受体的分子设计与分子识别

介绍了发光受体的几种典型分子识别模型。从分子识别与超分子化学的角度综述了它们在分子离子识别中的应用。对近几年发展较快的分子印迹技术及其应用进行了综述。引用文献71篇。     

分子电子器件的化学研究

在电子工程技术领域中,经历了电子管、晶体管、集成电路、大规模集成电路和超大规模集成电路等五个阶段后,已能在指甲大小的芯片上制成几十万个元件。然而,计算和实验表明,     

官能团化刚性大环的超分子化学

重点介绍具有纳米尺寸的苯炔刚性大环的超分子化学: 包括聚集效应, 主客体化学、液晶行为及二维、三维超分子结构等.     

Highly Stable Molecular Borromean Rings

A series of Cp*Rh‐based molecular Borromean rings (BRs) are prepared from naphthazarine or metallaligand. Some of as‐synthesized BRs display high stability and are formed in high yields in solution. The reason is related to the length ratio of the long‐arm linker and short‐arm linker, where smaller aspect ratios of the metallarectangles promote improved stability and yields of the BRs in solution. Increasing the width of the metallaligand or pyridyl ligand hinders the formation of BRs and leads to unoccupied monomeric rectangles, which were further used as catalysts for the acyl transfer reaction between N‐acetylimidazole and (4‐(pyridin‐4‐yl)phenyl) methanol.     

On Borromean links

n-Borromean links are nontrivial links in whichn rings,n 3, are combined in such a way that any two component rings form a trivial link. The symmetry of links withn = 3 is discussed, and it is shown that such links form a variety of series whose members are different isotopy types. Examples are adduced of 3-Borromean links that are topologically chiral: Novel constructions are described ofn-Borromean links with and without at least one nontrivial sublink.     

Self‐Assembly of Molecular Borromean Rings from Bimetallic Coordination Rectangles

In contrast to conventional stepwise synthesis of molecular Borromean rings, a self‐assembly synthetic method which proceeds without the aid of a template has been developed. In the formation of molecular rectangles, by adjustment of the long‐arm length of the rectangles, a series of size‐dependent Borromean‐link frameworks were constructed. Both the shortest length of two arms and the relative proportion of the length of the long arm to that of the short arm play a key role in the formation of Borromean rings. DFT calculations were used to provide theoretical support for the formation of discrete interlocked frameworks.     

Dynamic nanoscale Borromean links

Employing halogen atom labels on one of the ligand precursors, the lability of at least some of the 30 dative and 12 imine bonds stabilizing and constituting the three rings of a metallo-Borromean linked compound are scrambled in acidic methanolic solution.     

Nanoscale Borromean links for real

Borohydride reduction of a Borromean Ring (BR) complex containing six zinc(II) ions and 12 imine bonds has resulted in its demetallation, producing a neutral BR compound and also its free macrocycle, following cleavage of at least one of the imine bonds in the ethanolic reaction mixture.     

Catenanes: Fifty Years of Molecular Links

Half a century after Schill and Lüttringhaus carried out the first directed synthesis of a [2]catenane, a plethora of strategies now exist for the construction of molecular Hopf links (singly interlocked rings), the simplest type of catenane. The precision and effectiveness with which suitable templates and/or noncovalent interactions can arrange building blocks has also enabled the synthesis of intricate and often beautiful higher order interlocked systems, including Solomon links, Borromean rings, and a Star of David catenane. This Review outlines the diverse strategies that exist for synthesizing catenanes in the 21st century and examines their emerging applications and the challenges that still exist for the synthesis of more complex topologies.     

Adaptive Self-Assembly and Induced-Fit Interconversions between Molecular Borromean Rings,Russian Dolls and Ring-in-Ring Complexes

Herein,we report an artificially assembled interlocked system that features adaptive self-assembly and induced-fit transformation properties in the presence of appropriate guest molecules.By careful choice of solvent and guests,a molecular Borromean rings complex based on organometallic half-sandwich units could be transformed in a stepwise manner to a ring-in-ring complex and a monomeric rectangle,leading to a conversion cycle between these structures.This adaptive self-assembly method was further applied to the construction of a Russian dolls complex,forming another conversion cycle composed of a molecular Borromean rings complex,a Russian dolls complex and a monomeric rectangle.A comprehensive map showing all of the structural transformations between these metallarectangles and interlocked species is drawn up,representing a recoverable and recyclable transformation mechanism.     

Metric engineering of supramolecular Borromean rings

Two homologues of supramolecular Borromean rings were obtained based on the halogen-bonding-driven self-assembly of iodide ions with telechelic diiodoperfluoroalkanes.