Twisted Nanographenes with Robust Conformational Stability
Owing to a lack of methodology for rationally and selectively synthesizing twisted nanographenes, it is usually inevitable that we obtain nanographenes as a mixture with various geometries, such as unidirectionally twisted, alternatively twisted, randomly twisted, and even wavy structures, reflectin...
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2024-10-01
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| author | Penghui Song Yoshifumi Hashikawa Chaolumen |
| author_facet | Penghui Song Yoshifumi Hashikawa Chaolumen |
| author_sort | Penghui Song |
| collection | DOAJ |
| description | Owing to a lack of methodology for rationally and selectively synthesizing twisted nanographenes, it is usually inevitable that we obtain nanographenes as a mixture with various geometries, such as unidirectionally twisted, alternatively twisted, randomly twisted, and even wavy structures, reflecting the high activation barriers among them. Otherwise, they are interconvertible if the barriers are low enough such that only averaged properties can be observed under a thermal equilibrium. Recently, we reported on a double-twisted nanographene containing four [6]helicene units within the skeleton. In this paper, we discuss the robust conformational stability of the nanographene, both experimentally and computationally. The results indicate that the nanographene could only be racemized at temperatures exceeding 200 °C, and the first flip of one of the four [6]helicene units is the rate-degerming step. |
| format | Article |
| id | doaj-art-0addb343fdcd45f8b371f52587ff5679 |
| institution | Kabale University |
| issn | 2079-4991 |
| language | English |
| publishDate | 2024-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj-art-0addb343fdcd45f8b371f52587ff56792024-11-08T14:38:53ZengMDPI AGNanomaterials2079-49912024-10-011421173710.3390/nano14211737Twisted Nanographenes with Robust Conformational StabilityPenghui Song0Yoshifumi Hashikawa1Chaolumen2College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, ChinaInstitute for Chemical Research, Kyoto University, Uji 611-0011, Kyoto, JapanCollege of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, ChinaOwing to a lack of methodology for rationally and selectively synthesizing twisted nanographenes, it is usually inevitable that we obtain nanographenes as a mixture with various geometries, such as unidirectionally twisted, alternatively twisted, randomly twisted, and even wavy structures, reflecting the high activation barriers among them. Otherwise, they are interconvertible if the barriers are low enough such that only averaged properties can be observed under a thermal equilibrium. Recently, we reported on a double-twisted nanographene containing four [6]helicene units within the skeleton. In this paper, we discuss the robust conformational stability of the nanographene, both experimentally and computationally. The results indicate that the nanographene could only be racemized at temperatures exceeding 200 °C, and the first flip of one of the four [6]helicene units is the rate-degerming step.https://www.mdpi.com/2079-4991/14/21/1737nanographenetwisthelicene |
| spellingShingle | Penghui Song Yoshifumi Hashikawa Chaolumen Twisted Nanographenes with Robust Conformational Stability Nanomaterials nanographene twist helicene |
| title | Twisted Nanographenes with Robust Conformational Stability |
| title_full | Twisted Nanographenes with Robust Conformational Stability |
| title_fullStr | Twisted Nanographenes with Robust Conformational Stability |
| title_full_unstemmed | Twisted Nanographenes with Robust Conformational Stability |
| title_short | Twisted Nanographenes with Robust Conformational Stability |
| title_sort | twisted nanographenes with robust conformational stability |
| topic | nanographene twist helicene |
| url | https://www.mdpi.com/2079-4991/14/21/1737 |
| work_keys_str_mv | AT penghuisong twistednanographeneswithrobustconformationalstability AT yoshifumihashikawa twistednanographeneswithrobustconformationalstability AT chaolumen twistednanographeneswithrobustconformationalstability |