Organobismuth Molecular Crystals for Organic Topological Insulators
SCIE
SCOPUS
- Title
- Organobismuth Molecular Crystals for Organic Topological Insulators
- Authors
- KIM, YOYOUNG; KOO, JINYOUNG; CHOI, HEE CHEUL
- Date Issued
- 2018-10
- Publisher
- American Chemical Society
- Abstract
- Three different types of large and high-quality organobismuth molecular crystals were grown by a physical vapor transport process. The target organobismuth molecules that have similar molecular structures, except for the type and position of the functional group, were crystallized into colorless and wire-shaped crystals having lengths at the centimeter scale with uniform flat surface. The crystal-packing structures of the organobismuth crystals were determined by single-crystal X-ray diffraction. The results show
that the molecular packing can be controlled by a slight change of the functional group due to their different intermolecular interactions. Especially, the Bi−Bi distance was successfully controlled to vary from 5.11(1) to 5.71(3) and 5.18(2) Å for triphenylbismuth (TPB), tri-p-tolylbismuthine (p-TTB), and tri-o-tolylbismuthine (o-TTB), respectively. The different crystal structures and Bi−Bi distances can affect the topological behavior of the materials. Moreover, the electrical and optical properties of the target organobismuth crystals were confirmed through the I−V characteristics, density functional theory calculation, and photoluminescence spectroscopy. These findings potentially offer a new route and strategy for the development of organic topological insulators.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/95880
- DOI
- 10.1021/acsanm.8b01649
- ISSN
- 2574-0970
- Article Type
- Article
- Citation
- ACS APPLIED NANO MATERIALS, vol. 1, no. 10, page. 5419 - 5424, 2018-10
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