Unveiling 79-Year-Old Ixene and Its BN-Doped Derivative
- 24 August 2020
- journal article
- research article
- Published by Wiley in Angewandte Chemie-International Edition
- Vol. 59 (35), 14891-14895
- https://doi.org/10.1002/anie.202004049
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are key components of organic electronics. The electronic properties of these carbon-rich materials can be controlled through doping with heteroatoms such as B and N, however, few convenient syntheses of BN-doped PAHs have been reported. Described herein is the rationally designed, two-step syntheses of previously unknown ixene and BN-doped ixene (B2N2-ixene), and their characterizations. Compared to ixene, B2N2-ixene absorbs longer-wavelength light and has a smaller electrochemical energy gap. In addition to its single-crystal structure, scanning tunneling microscopy revealed that B2N2-ixene adopts a nonplanar geometry on a Au(111) surface. The experimentally obtained electronic structure of B2N2-ixene and the effect of BN-doping were confirmed by DFT calculations. This synthesis enables the efficient and convenient construction of BN-doped systems with extended pi-conjugation that can be used in versatile organic electronics applications.Funding Information
- National Research Foundation of Korea (NRF-2017R1D1A1B03030041, NRF-2019R1A4A1027934)
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