[<i>n</i>]Helicene Diimides (<i>n</i> = 5, 6, and 7): Through-Bond versus Through-Space Conjugation
作者:Fridolin Saal、Fangyuan Zhang、Marco Holzapfel、Matthias Stolte、Evripidis Michail、Michael Moos、Alexander Schmiedel、Ana-Maria Krause、Christoph Lambert、Frank Würthner、Prince Ravat
DOI:10.1021/jacs.0c11053
日期:2020.12.23
requirement for the material design. In this communication, we describe the design, synthesis, and functional properties of a novel class of helically chiral diimide molecules, namely, [n]HDI-OMe (n = 5, 6, and 7), in which two imide units are connected via an [n]helicene skeleton. The experimental results supported by quantum chemical calculations reveal that the helical backbone in these molecules offers
π 共轭功能分子中助色基团之间的相互作用决定了它们的电子特性。从潜在应用的角度来看,理解和控制这种相互作用是材料设计的重要要求。在本文中,我们描述了一类新型螺旋手性二亚胺分子的设计、合成和功能特性,即 [n]HDI-OMe(n = 5、6 和 7),其中两个亚胺单元相连通过 [n] 螺旋烯骨架。量子化学计算支持的实验结果表明,这些分子中的螺旋骨架不仅提供了酰亚胺基团之间的贯通键,而且提供了贯通空间共轭,与相关的 [n] 螺旋烯和芘二酰亚胺。