Bedi Anjan, Carmieli Raanan, Gidron Ori
Institute of Chemistry, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Jerusalem 91904, Israel.
Chemical Research Support Unit, Weizmann Institute of Science, Rehovot 76100, Israel.
Chem Commun (Camb). 2019 May 28;55(43):6022-6025. doi: 10.1039/c9cc02735a. Epub 2019 May 7.
We introduce the first series of enantiopure twistacene radical cations, which form reversibly upon chemical or electrochemical oxidation. Their vis-NIR chiroptical properties (Cotton effect and anisotropy factor) increase systematically with the backbone twist. The hyperfine constants observed by EPR demonstrate significant spin delocalization even for large backbone twist angles.
我们介绍了第一系列对映体纯的扭曲并四苯自由基阳离子，它们在化学或电化学氧化时可逆形成。它们的可见-近红外手性光学性质（科顿效应和各向异性因子）随着主链扭曲而系统性增加。通过电子顺磁共振观察到的超精细常数表明，即使对于大的主链扭曲角，也存在显著的自旋离域。
