The solvothermal synthesis and characterization of quaternary arsenic chalcogenides CsTMAsQ (TM = Hg, Cd; Q = S, Se) using Cs as a structure directing agent: from 1D anionic chains to 2D anionic layers

• Published in: RSC advances 2020-09, Vol.1 (57), p.3493-3499
• Main Authors: Tian, Xin-Yu, Du, Cui-Xia, ZhaoRi, GeTu, SheLe, MuGe, Bao, Yongsheng, Baiyin, Menghe
• Format: Article
• Language: English
• ISSN: 2046-2069
• DOI: 10.1039/d0ra05058j

Four new quaternary transition metal arsenic chalcogenide Cs-TM-As-Q compounds (TM = Hg, Cd; Q = S, Se) were synthesized using different mixed solvents. A 1,4-diaminobutane(1,4-dab)/water mixed solvent system was used to solvothermally synthesize the selenoarsenates CsTMAsSe 3 (TM = Hg ( 1 ), Cd ( 2 )). In 1 , the eight-membered ring anion chain consists of trigonal-planar [HgSe 3 ] and trigonal-pyramid [AsSe 3 ]. Compound 2 is similar to the eight-membered ring chain anion of compound 1 , and [CdAsSe 3 ] − further joins, through μ 3 -Se and Cd, to form the layer anions [CdAsSe 3 ] − . A 2-diaminopropane (1,2-dap) and water mixed solvent system was used to synthesize two thioarsenates, Cs 2 TM 2 As 2 S 6 (TM = Cd ( 3 ), Hg ( 4 )). Compounds 3 , 4 and 2 are isostructural; the Cd and Hg atoms are four coordinated. Compounds 1-4 utilize Cs + cations as a structural directing agent. Finally, the structural and optical properties of the novel series of arsenic chalcogenides were characterized. Presented is a method involving TM-As-Q (TM = Hg, Cd; Q = S, Se) quaternary arsenic chalcogenides and different mixed solvents which has been used to synthesize four new quaternary chalcogenide compounds.