Electronic Materials: An Antiaromatic Propeller Made from the Four‐Fold Fusion of Tetraoxa[8]circulene and Perylene Diimides
作者:Viktor B. R. Pedersen、Stephan K. Pedersen、Zexin Jin、Nicolaj Kofod、Bo W. Laursen、Glib V. Baryshnikov、Colin Nuckolls、Michael Pittelkow
DOI:10.1002/anie.202212293
日期:2022.11.25
Annelating the antiaromatic tetraoxa[8]circulene with four perylenediimide units yields an intensely absorbing and emissivecharge-transfer molecule. The aromatic/antiaromatic character of neutral and charged species and the incorporation in bulk hetero junction solar cell (power conversion efficiency of 6.4 %) is described.
作者:Masahiro Yamashina、Yuya Tanaka、Roy Lavendomme、Tanya K. Ronson、Michael Pittelkow、Jonathan R. Nitschke
DOI:10.1038/s41586-019-1661-x
日期:2019.10.24
which are observed at chemicalshift values of up to 24 parts per million (ppm), owing to the combined antiaromatic deshielding effect of the surrounding rings. This value, shifted 15 ppm from that of the free guest, is the largest 1H NMR chemicalshift displacement resulting from an antiaromatic environment observed so far. This cage may thus be considered as a type of NMR shift reagent, moving guest
Tetra-tert-butyltetraoxa[8]circulene and Its Unusual Aggregation Behaviour
作者:Theis Brock-Nannestad、Christian B. Nielsen、Magnus Schau-Magnussen、Peter Hammershøj、Theis K. Reenberg、Asger B. Petersen、Denis Trpcevski、Michael Pittelkow
DOI:10.1002/ejoc.201100966
日期:2011.11
first example of the synthesis of a tetraoxa[8]circulene with only four substituents by means of BF 3 ·OEt 2 mediated tetramerisation of tert-butyl-1,4-benzoquinone. Two of the four regioisomers of tetra-tert-butyltetraoxa[8]circulene have been isolated and characterised by single-crystal X-ray analysis. It was found that the tetra-tert-butyltetraoxa[8]circulenes aggregate in solution through a cooperative
我们描述了通过 BF 3 ·OEt 2 介导的叔丁基-1,4-苯醌四聚作用合成只有四个取代基的四氧杂[8]环烯的第一个例子。四叔丁基四氧杂 [8] 环烯的四种区域异构体中的两种已被分离出来,并通过单晶 X 射线分析进行了表征。发现四叔丁基四氧杂[8]环烯在溶液中通过协同聚合机制聚集,尽管用大叔丁基取代基官能化。