Furan-containing double tetraoxa[7]helicene and its radical cation.

Furan-containing double tetraoxa[7]helicene and its radical cation.
Chem Commun (Camb). 2020 Nov 20;:
Authors: Chang H, Liu H, Dmitrieva E, Chen Q, Ma J, He P, Liu P, Popov AA, Cao XY, Wang XY, Zou Y, Narita A, Müllen K, Peng H, Hu Y
Abstract
An unprecedented furan-based double oxa[7]helicene 1 was achieved, featuring a stable twisted conformation with π-overlap at both helical ends. The excellent conformational stability allowed for optical resolution of 1, which provided a pair of enantiomers exhibiting pronounced mirror-imaged circular dichroism and circularly polarized luminescence activity. The radical cation of 1 was obtained by chemical oxidation as evidenced by UV-Vis-NIR absorption, electron paramagnetic resonance spectroscopy and in situ spectroelectrochemistry. The present work is the starting point for the investigation of open-shell oxahelicenes.
PMID: 33216069 [PubMed - as supplied by publisher]

Source: Chemical Communications - November 20, 2020 Category: Chemistry Authors: Chang H, Liu H, Dmitrieva E, Chen Q, Ma J, He P, Liu P, Popov AA, Cao XY, Wang XY, Zou Y, Narita A, Müllen K, Peng H, Hu Y Tags: Chem Commun (Camb) Source Type: research