五邊石墨烯
| 五邊石墨烯 | |
|---|---|
| 英文名 | Penta-graphene |
| 識別 | |
| CAS號 | 暫未分配 |
| 性質 | |
| 化學式 | Cx |
| 若非註明，所有數據均出自標準狀態（25 ℃，100 kPa）下。 | |
特性
其分子結構以五邊形組成，形似開羅五邊形鑲嵌。[2]這種形態建基於分析和模擬，在2014年被提出。[2]進一步的計算顯示純粹以此形態存在的碳是不穩定的，[3]但將其氫化後可變得穩定。[1]由於其結構，它罕見地具有負值蒲松比，強度相信比石墨烯高，且據預測它能在高達1000K時仍為化學穩定。[2]
它具有sp2及sp3混成的碳原子。與石墨烯等同素異形體相反，其為絕緣體，具4.1–4.3 eV的間接帶隙。其氫化後的化合物為五邊石墨烷（Penta-graphane），其結構更近似於鑽石，只有sp3混成的碳原子，因此其帶隙更闊，約為5.8 eV。[1]另外，手性五邊石墨烯納米管亦被視為碳的亞穩形態。[4][2][5]
參考
- ^ 1.0 1.1 1.2 Einollahzadeh, Hamideh; Fazeli, Seyed Mahdi; Dariani, Reza Sabet. Studying the electronic and phononic structure of penta-graphane. Science and Technology of Advanced Materials. 2016, 17 (1): 610–617. PMC 5102001
. PMID 27877907. arXiv:1511.06850 . doi:10.1080/14686996.2016.1219970.
- ^ 2.0 2.1 2.2 2.3 Zhang, S.; Zhou, J.; Wang, Q.; Chen, X.; Kawazoe, Y.; Jena, P. Penta-graphene: A new carbon allotrope. Proceedings of the National Academy of Sciences. 2015, 112 (8): 201416591. Bibcode:2015PNAS..112.2372Z. PMC 4345574 . doi:10.1073/pnas.1416591112.
- ^ Ewels, Christopher P.; Rocquefelte, Xavier; Kroto, Harold W.; Rayson, Mark J.; Briddon, Patrick R.; Heggie, Malcolm I. Predicting experimentally stable allotropes: Instability of penta-graphene. Proceedings of the National Academy of Sciences. 2015, 112 (51): 15609–12. Bibcode:2015PNAS..11215609E. PMC 4697406 . PMID 26644554. doi:10.1073/pnas.1520402112.
- ^ Quijano-Briones, JJ.; Fernandez_escamilla, HN; Tlahuice-Flores, Alfredo. Chiral penta-graphene nanotubes: Structure, bonding and electronic properties. Computational and Theoretical Chemistry. 2017, 1108: 201520402. doi:10.1016/j.comptc.2017.03.019.
- ^ Avramon, P; Demin, V; Luo, M. Translation Symmetry Breakdown in Low-Dimensional Lattices of Pentagonal Rings. J. Phys. Chem. Lett. 2015, 6 (22): 4525–4531. doi:10.1021/acs.jpclett.5b02309.
