Redox control and high conductivity of nickel bis(dithiolene) complex π-nanosheet: A potential organic two-dimensional topological insulator

Tetsuya Kambe; Ryota Sakamoto; Tetsuro Kusamoto; Tigmansu Pal; Naoya Fukui; Ken Hoshiko; Takahiro Shimojima; Zhengfei Wang; Toru Hirahara; Kyoko Ishizaka; Shuji Hasegawa; Feng Liu; Hiroshi Nishihara

doi:10.1021/ja507619d

Redox control and high conductivity of nickel bis(dithiolene) complex π-nanosheet: A potential organic two-dimensional topological insulator

Tetsuya Kambe, Ryota Sakamoto, Tetsuro Kusamoto, Tigmansu Pal, Naoya Fukui, Ken Hoshiko, Takahiro Shimojima, Zhengfei Wang, Toru Hirahara, Kyoko Ishizaka, Shuji Hasegawa, Feng Liu, Hiroshi Nishihara

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326 Citations (Scopus)

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 × 10² 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).

Original language	English
Pages (from-to)	14357-14360
Number of pages	4
Journal	Journal of the American Chemical Society
Volume	136
Issue number	41
DOIs	https://doi.org/10.1021/ja507619d
Publication status	Published - 2014 Oct 15
Externally published	Yes

ASJC Scopus subject areas

Catalysis
Chemistry(all)
Biochemistry
Colloid and Surface Chemistry

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10.1021/ja507619d

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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. (2014). Redox control and high conductivity of nickel bis(dithiolene) complex π-nanosheet: A potential organic two-dimensional topological insulator. Journal of the American Chemical Society, 136(41), 14357-14360. https://doi.org/10.1021/ja507619d

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 2014, 'Redox control and high conductivity of nickel bis(dithiolene) complex π-nanosheet: A potential organic two-dimensional topological insulator', Journal of the American Chemical Society, vol. 136, no. 41, pp. 14357-14360. https://doi.org/10.1021/ja507619d

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title = "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 × 102 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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AU - Kambe, Tetsuya

AU - Sakamoto, Ryota

AU - Kusamoto, Tetsuro

AU - Pal, Tigmansu

AU - Fukui, Naoya

AU - Hoshiko, Ken

AU - Shimojima, Takahiro

AU - Wang, Zhengfei

AU - Hirahara, Toru

AU - Ishizaka, Kyoko

AU - Hasegawa, Shuji

AU - Liu, Feng

AU - Nishihara, Hiroshi

PY - 2014/10/15

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N2 - 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 × 102 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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Redox control and high conductivity of nickel bis(dithiolene) complex π-nanosheet: A potential organic two-dimensional topological insulator

Abstract

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