五边石墨烯
| 五边石墨烯 | |
|---|---|
| 英文名 | Penta-graphene |
| 识别 | |
| CAS号 | 暂未分配 |
| 性质 | |
| 化学式 | Cx |
| 若非注明，所有数据均出自标准状态（25 ℃，100 kPa）下。 | |
特性
[编辑]其分子结构以五边形组成，形似开罗五边形镶嵌。[2]这种形态建基于分析和模拟，在2014年被提出。[2]进一步的计算显示纯粹以此形态存在的碳是不稳定的，[3]但将其氢化后可变得稳定。[1]由于其结构，它罕见地具有负值蒲松比，强度相信比石墨烯高，且据预测它能在高达1000K时仍为化学稳定。[2]
它具有sp2及sp3混成的碳原子。与石墨烯等同素异形体相反，其为绝缘体，具4.1–4.3 eV的间接带隙。其氢化后的化合物为五边石墨烷（Penta-graphane），其结构更近似于钻石，只有sp3混成的碳原子，因此其带隙更阔，约为5.8 eV。[1]另外，手性五边石墨烯纳米管亦被视为碳的亚稳形态。[4][2][5]
参考
[编辑]- ^ 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.
