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Redox Control and High Conductivity of Nickel Bis(dithiolene) Complex π-Nanosheet: A Potential Organic Two-Dimensional Topological Insulator
Abstract
A bulk material comprising stacked nanosheets of nickel bis(dithiolene) complexes is investigated. The average oxidation number is -3/4 for each complex unit in the as-prepared sample; oxidation or reduction respectively can change this to 0 or -1. Refined electrical conductivity measurement, involving a single microflake sample being subjected to the van der Pauw method under scanning electron microscopy control, reveals a conductivity of 1.6 × 10(2) S cm(-1), which is remarkably high for a coordination polymeric material. Conductivity is also noted to modulate with the change of oxidation state. Theoretical calculation and photoelectron emission spectroscopy reveal the stacked nanosheets to have a metallic nature. This work provides a foothold for the development of the first organic-based two-dimensional topological insulator, which will require the precise control of the oxidation state in the single-layer nickel bisdithiolene complex nanosheet (cf. Liu, F. et al. Nano Lett. 2013, 13, 2842).
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Metadata
- Authors
- Kambe, T., Sakamoto, R., Kusamoto, T., Pal, T., Fukui, N., Hoshiko, K., Shimojima, T., Wang, Z., Hirahara, T., Ishizaka, K., Hasegawa, S., Liu, F., & Nishihara, H.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2014-10-01
- Volume
- 136
- Issue
- 41
- Pages
- 14357-14360
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2331460189
- Cited by
- 468
- References
- 9
- FWCI
- 12.34
- Type
- journal article
- Language
- en
- Open access
- closed
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