Furan-containing double tetraoxa[7]helicene and its radical cation. Issue 96 (20th November 2020)

• Record Type: Journal Article
• Authors: Chang, Hao; Liu, Haoliang; Dmitrieva, Evgenia; Chen, Qiang; Ma, Ji; He, Piao; Liu, Pengcai; Popov, Alexey A.; Cao, Xiao-Yu; Wang, Xiao-Ye; Zou, Yingping; Narita, Akimitsu; Müllen, Klaus; Peng, Hongjian; Hu, Yunbin
• Is Part Of: Chemical communications. Volume 56:Issue 96(2020)
• Page Start: 15181
• Page End: 15184
• Publication Date: 2020-11-20
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1039/d0cc06970a
• Languages: English
• ISSNs: 1359-7345

Abstract

Abstract : A furan-based double [7]heterohelicene and its radical cation were achieved with fascinating chiroptical response for the neutral compound. 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.