Rhenium diselenide

Rhenium diselenide

d: SEM micrograph of a typical parallelogram-shaped ReSe2 flake, scale bar 1 µm.
g: top view of the ReSe2 atomic lattice
Unit cell of rhenium diselenide under standard conditions.
Unit cell of rhenium diselenide.
Names
IUPAC name
Bis(selanylidene)rhenium
Other names
Rhenium(IV) selenide
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.031.696 Edit this at Wikidata
EC Number
  • 234-879-9
  • InChI=1S/2Se.Re
    Key: CUYHGAIVHCHFIA-UHFFFAOYSA-N
  • [Se]=[Re]=[Se]
Properties
ReSe2
Molar mass 344.13 g/mol[1]
Odor odorless
Density 9.22 g/cm3[2]
insoluble
Band gap ~1.2 eV (300 K), indirect[3]
Structure
Triclinic, aP12, space group P1, No 2[2]
a = 0.6602 nm, b = 0.6716 nm, c = 0.6728 nm
α = 91.82°, β = 104.9°, γ = 118.94°
4
Related compounds
Other anions
 Rhenium(IV) oxide
Rhenium disulfide
Rhenium ditelluride
Other cations
 Manganese diselenide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Rhenium diselenide is an inorganic compound with the formula ReSe2. It has a layered structure where atoms are strongly bonded within each layer. The layers are held together by weak Van der Waals bonds, and can be easily peeled off from the bulk material.

Synthesis

Schematic of the ReSe2 growth from Se and ReO3

Rhenium diselenide with a thickness as small as a triple-atomic layer can be produced by chemical vapor deposition at ambient pressure. A mixture of Ar and hydrogen gases is flown through a tube whose ends are kept at different temperatures. The substrate and ReO3 powder are placed at the hot end which is heated to 750 °C, and selenium powder is located at the cold end which is kept at 250 °C.[4]

2 ReO3 + 7 Se → 2 ReSe2 + 3 SeO2

Properties

Top view (left) and side view (right) of the ReSe2 lattice

As most other dichalcogenides of transition metals, rhenium diselenide has a layered structure where atoms are strongly bonded within each layer and the layers are held together by weak Van der Waals bonds. However, while most other layered dichalcogenides have a high (hexagonal) symmetry, ReSe2 has a very low triclinic symmetry, and this symmetry does not change from the bulk to monolayers.[4]

References

Wikimedia Commons has media related to Rhenium diselenide.
  1. ^ Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). Boca Raton, Florida: CRC Press. p. 4.84. ISBN 1-4398-5511-0.
  2. ^ a b Wildervanck, J.C; Jellinek, F (1971). "The dichalcogenides of technetium and rhenium". Journal of the Less Common Metals. 24: 73–81. doi:10.1016/0022-5088(71)90168-8.
  3. ^ Dumcenco, D; Huang, Y. S; Liang, C. H; Tiong, K. K (2008). "Optical characterization of Au-doped rhenium diselenide single crystals". Journal of Applied Physics. 104 (6): 063501–063501–6. Bibcode:2008JAP...104f3501D. doi:10.1063/1.2977682.
  4. ^ a b Jiang, Shaolong; Hong, Min; Wei, Wei; Zhao, Liyun; Zhang, Na; Zhang, Zhepeng; Yang, Pengfei; Gao, Nan; Zhou, Xiebo; Xie, Chunyu; Shi, Jianping; Huan, Yahuan; Tong, Lianming; Zhao, Jijun; Zhang, Qing; Fu, Qiang; Zhang, Yanfeng (2018). "Direct synthesis and in situ characterization of monolayer parallelogrammic rhenium diselenide on gold foil". Communications Chemistry. 1. doi:10.1038/s42004-018-0010-6.

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