Modular Synthesis of Structurally Diverse Azulene-Embedded Polycyclic Aromatic Hydrocarbons by Knoevenagel-Type Condensation
Research output: Contribution to journal › Research article › Contributed › peer-review
Contributors
Abstract
The research interest in azulene-embedded polycyclic aromatic hydrocarbons (PAHs) has significantly increased recently, but the lack of efficient synthetic strategies impedes the investigation of their structure-property relationships and further opto-electronic applications. Here we report a modular synthetic strategy towards diverse azulene-embedded PAHs by a tandem Suzuki coupling and base-promoted Knoevenagel-type condensation with good yields and great structural versatility, including non-alternant thiophene-rich PAHs, butterfly- or Z-shaped PAHs bearing two azulene units, and the first example of a two-azulene-embedded double [5]helicene. The structural topology, aromaticity and photophysical properties were investigated by NMR, X-ray crystallography analysis and UV/Vis absorption spectroscopy assisted by DFT calculations. This strategy provides a new platform for rapidly synthesizing unexplored non-alternant PAHs or even graphene nanoribbons with multiple azulene units.
Details
Original language | English |
---|---|
Article number | e202219091 |
Number of pages | 8 |
Journal | Angewandte Chemie - International Edition |
Volume | 62 |
Issue number | 21 |
Early online date | 6 Mar 2023 |
Publication status | Published - 15 May 2023 |
Peer-reviewed | Yes |
External IDs
WOS | 000973473500001 |
---|
Keywords
Research priority areas of TU Dresden
ASJC Scopus subject areas
Keywords
- Aromaticity, Azulene, Helicenes, Polycyclic Aromatic Hydrocarbons, Structure Elucidation