期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 136, 期 41, 页码 14357-14360出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja507619d
关键词
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资金
- MEXT of Japan [21108002, 24750054, 24750142, 25107510, 25246025, 25620037, 26708005, 26107510, 26110505, 26248017, 26620039, 2107, 2406, 2506, 2509]
- Tokuyama Science Foundation
- Ogasawara Foundation for the Promotion of Science Emgineering
- Japan Association for Chemical Innovation
- Kao Foundation for Arts and Sciences
- Asahi Glass Foundation
- Noguchi Institute
- Iketani Science and Technology Foundation
- DOE-BES [DE-FG02-04ER46148]
- Grants-in-Aid for Scientific Research [25110010, 13J01282, 26708005, 25107002, 25600093, 25246025, 26110505, 26248017, 25107510, 23245029, 26107510, 26620039, 24750142, 25620037] Funding Source: KAKEN
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 x 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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