Dicopper(I) trefoil knots and related unknotted molecular systems: influence of ring size and structural factors on their synthesis and electrochemical and excited-state properties
作者:Christiane O. Dietrich-Buchecker、Jean Francois Nierengarten、Jean Pierre Sauvage、Nicola Armaroli、Vincenzo Balzani、Luisa De Cola
DOI:10.1021/ja00077a024
日期:1993.12
Five new dicopper(I) knots have been synthesized as well as their face-to-face isomers. The knots range from 80- to 90-membered rings, and their preparation yields depend crucially on structural parameters such as number of methylene fragments linking the two chelating units and length of the poly(ethyleneoxy) unit used in the cyclization reaction. The best yield was obtained for an 84-membered knotted
已经合成了五种新的二铜(I)结及其面对面的异构体。结的范围从 80 到 90 元环,它们的制备产率主要取决于结构参数,例如连接两个螯合单元的亚甲基片段的数量和环化反应中使用的聚(亚乙基氧基)单元的长度。具有 -(CH 2 ) 6 - 连接器的 84 元打结环获得了最佳产率:这个相对较长的片段允许双螺旋前体明显缠绕,因此有利于打结反应。在某些情况下,面对面的复合物是主要产品,在二铜(I)双(43 元环)体系的情况下,其收率高达 24%