Title
Triple Oxa[7]helicene with Circularly Polarized Luminescence: Enhancing the Dissymmetry Factors via Helicene Subunit Multiplication
Author
Fulin Zhoua, Zhenmei Huanga, Zhongyan Huangb, Rui Chenga, Yudong Yang, Jingsong Youa
Year
2021
Journal
Organic Leters. 2021, 23, 12, 4559–4563
Abstract
The development of multiple heterohelicenes with a high luminescence dissymmetry factor (glum) is an appealing yet challenging task. Herein, we disclose the synthesis of a structurally unusual furan-based triple oxa[7]helicene, which represents the first reported triple hetero[7]helicene, via [2+2+2] cyclotrimerization/intramolecular dehydrogenative annulation. Compared to the reported double oxa[7]helicene, the triple oxa[7]helicene exhibits an improved glum value of 1.8 × 10–3, exemplifying the potential of the helicene subunit multiplication approach to enhance the glum of heterohelicenes.
Instrument
CPL-300
Keywords
Luminescence,Aromatic compounds,Polarity,Molecular structure,Chemical calculations