Journal
JOURNAL OF ORGANIC CHEMISTRY
Volume 86, Issue 14, Pages 9820-9827Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.joc.1c00399
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- Academia Sinica
- Ministry of Science and Technology (Taiwan, Republic of China)
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The study successfully synthesized six stable and soluble electron acceptors using specific synthetic methods, with LUMO energy levels comparable to benchmark compounds. Additionally, the research found that each additional nitrile group reduces the LUMO energy by 0.2 eV.
The central dogma in constructing organic electron acceptors is to attach electron-withdrawing groups to polycyclic aromatic hydrocarbons. Yet, the full potentials of many organic acceptors were never realized due to synthetic obstacles. By combining the Wittig-Knoevenagel benzannulation, the Pd(0)-catalyzed cyanation, and nucleophilic addition/oxidation cyanation, six polynitrile Z-shaped perylene diimide were synthesized. These stable and soluble electron acceptors possess LUMO energy levels comparable with those of benchmark compounds. Electro-chemical investigation reveals that each additional nitrile group reduces the LUMO energy by 0.2 eV.
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