Advances in nitrogen-containing helicenes: synthesis, chiroptical properties, and optoelectronic applications

• Meng Qiu,
• Jing Du,
• Nai-Te Yao,
• Xin-Yue Wang and
• Han-Yuan Gong

Beilstein J. Org. Chem. 2025, 21, 1422–1453, doi:10.3762/bjoc.21.106

• , emphasizing their potential as next-generation chiral optoelectronic materials and outlining future directions toward multifunctional integration and quantum technological applications. Keywords: azahelicene; chiroptical properties; circularly polarized luminescence (CPL); heteroatom containing

• signals. This study presents a novel approach to constructing stable, redox-switchable chiral luminophores based on extended azahelicene architectures, offering broad potential for molecular electronics and spintronic devices. In 2024, Qiu’s group synthesized π-extended diaza[7]helicenes 23a–f

• = 2.1 × 10−2, and BCPL values up to 76 M−1 cm−1. Collectively, these investigations underscore the efficacy of heteroatom doping, extended π-conjugation, and radical design in advancing azahelicene-based systems. These approaches significantly enhance optical and chiroptical performance, paving the way

A facile synthesis of functionalized 7,8-diaza[5]helicenes through an oxidative ring-closure of 1,1’-binaphthalene-2,2’-diamines (BINAMs)

• Youhei Takeda,
• Masato Okazaki,
• Yoshiaki Maruoka and
• Satoshi Minakata

Beilstein J. Org. Chem. 2015, 11, 9–15, doi:10.3762/bjoc.11.2

• , which is a member of the azahelicene family [5]: These compounds would be a suitable model for probing the effects of the replacement of carbon atoms at the K-region of the carbohelicenes with nitrogen atoms on their structures and physicochemical properties [12][13][14] and should serve as ligands to