Ring-Expansion Strategy for α-Aryl Azahelicene Construction: Building Blocks for Optoelectronic Materials
2021; American Chemical Society; Volume: 23; Issue: 20 Linguagem: Inglês
10.1021/acs.orglett.1c03070
ISSN1523-7060
AutoresJia Feng, Limin Wang, Xiaoping Xue, Zengyin Chao, Biqiong Hong, Zhenhua Gu,
Tópico(s)Organoboron and organosilicon chemistry
ResumoAn acid-mediated rapid synthesis of α-aryl azahelicenes via C-C bond cleavage of helical 9H-fluoren-9-ols is reported. The newly introduced aryl ring and pyridine moieties provide an excellent opportunity to further tune the properties of azahelicences: i.e., photoluminescence. The novel α-aryl azahelicenes showcase high circularly polarized luminescence (CPL) efficiencies (4.5 × 10-3) as well as CPL brightness (BCPL), reaching 7.39 M-1 cm-1, which indicates a potential application as chiral emitters.
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