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Two new phases in the ternary RE–Ga–S systems with unique interlinkage of GaS4 building units: synthesis, structure, and properties

Abstract

Two novel ternary rare-earth chalcogenides, Yb6Ga4S15 and Lu5GaS9 have been prepared by solid-state reactions of an elemental mixture at high-temperatures. Their structures were determined on the basis of single-crystal X-ray diffraction, Yb6Ga4S15 crystallizes in the monoclinic space group C2/m (No.12) [a = 23.557(2) Å, b = 3.7664(4) Å, c = 12.466(1) Å, β = 90.915(9)°, V = 1105.9(2) Å3 and Z = 2], whereas Lu5GaS9 crystallizes in the triclinic space group P1 @#x0305; (No.2) [a = 7.735(3) Å, b = 10.033(4) Å, c = 10.120(4) Å, α = 106.296(4)°, β = 100.178(5)°, γ =101.946(3)°, V = 714.1(5) Å3 and Z = 2]. Both structures feature complicated three dimensional frameworks with unique interlinkages of GaS4 as basic building units. Significantly, photo-electrochemical measurement indicated that title compounds were photoresponsive under visible-light illumination. Furthermore, the UV–Visible–Near IR diffuse reflectance spectra, thermal stabilities, electronic structures, physical properties as well as a structure change trend of the ternary rare-earth/gallium/sulfur compounds have been performed.

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Publication details

The article was received on 13 Jul 2017, accepted on 11 Sep 2017 and first published on 11 Sep 2017


Article type: Paper
DOI: 10.1039/C7DT02545A
Citation: Dalton Trans., 2017, Accepted Manuscript
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    Two new phases in the ternary RE–Ga–S systems with unique interlinkage of GaS4 building units: synthesis, structure, and properties

    H. Lin, J. Shen, W. Zhu, Y. Liu, X. Wu, Q. Zhu and L. Wu, Dalton Trans., 2017, Accepted Manuscript , DOI: 10.1039/C7DT02545A

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