期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 143, 期 43, 页码 17958-17963出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.1c09058
关键词
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资金
- National Natural Science Foundation of China [21901128, 22071120]
- National Key R&D Program of China [2020YFA0711500]
- Fundamental Research Funds for the Central Universities
This study presents unprecedented B,N-embedded double hetero[7]helicenes with excellent chiroptical properties, high absorption dissymmetry factors, and tunable circularly polarized luminescence, opening up new possibilities for the development of high-performance chiroptical materials in the future.
The development of helicene molecules with significant chiroptical responses covering a broad range of the visible spectrum is highly desirable for chiral optoelectronic applications; however, their absorption dissymmetry factors (gabs) have been mostly lower than 0.01. In this work, we report unprecedented B,N-embedded double hetero[7]helicenes with nonbonded B and N atoms, which exhibit excellent chiroptical properties, such as strong chiroptical activities from 300 to 700 nm, record high gabs up to 0.033 in the visible spectral range, and tunable circularly polarized luminescence (CPL) from red to near-infrared regions (600-800 nm) with high photoluminescence quantum yields (PLQYs) up to 100%. As revealed by theoretical analyses, the high gabs values are related to the separate molecular orbital distributions owing to the incorporation of nonbonded B and N atoms. The new type of B,N-embedded double heterohelicenes opens up an appealing avenue to the future exploitation of high-performance chiroptical materials.
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