Takamuku Shota, Nakano Masayoshi, Kertesz Miklos
Department of Chemistry and Institute of Soft Matter, Georgetown University, 37thand O Streets, Washington, DC, 20057-1227, USA.
Depertment of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka, 560-8531, Japan.
Chemistry. 2017 Jun 1;23(31):7474-7482. doi: 10.1002/chem.201700999. Epub 2017 May 2.
We show that diradicaloid helical conjugated molecules can display strong through-space bonding interactions. These interactions are analogous to π-stacking pancake bonding widely observed for dimers and other aggregates of stable π-conjugated radicals. We show that these multicenter interactions can have a significant stabilizing effect, but they depend in subtle ways on the specific overlap and relative orientations of the radical carrying subunits. The specific through-space interactions between the radicaloid units occur at specific size ranges of the helical molecules.
我们表明，双自由基螺旋共轭分子可表现出强烈的空间键合相互作用。这些相互作用类似于在稳定的π共轭自由基的二聚体和其他聚集体中广泛观察到的π堆积煎饼键合。我们表明，这些多中心相互作用可产生显著的稳定作用，但它们以微妙的方式取决于携带自由基的亚基的特定重叠和相对取向。类自由基单元之间的特定空间相互作用发生在螺旋分子的特定尺寸范围内。
