Solvent mediated metathetical approach to the room temperature synthesis of ternary (mixed metal) chalcogenide materials in liquid ammonia.
MAIN GROUP MET CHEM
453 - 462.
Liquid ammonia mediated metathetical reactions of disodium, chalcogenide (Na2E; E = S, Se, Te) and metal halides afforded ternary chalcopyrite-type materials of general formula ABE(2) (A = Cu, Ag; B = Ga, In; E = S, Se), CuSbE2 (E = S, Se, Te), Cu12Sb4S(16-x), and CuFeS2 in good yield (>90%), in addition to co-produced salt. The reactions, carried out in liquid ammonia at room temperature, afforded X-ray amorphous aggregates. Annealing the purified products at 200-250degreesC for 3 hours resulted in single phase, crystalline products of the desired stoichiometry. The annealed products were characterised by X-ray Powder Diffraction (XRD), Energy Dispersive X-ray Analysis (EDXA), Scanning Electron Microscopy (SEM), Fourier Transform Infra-red Spectroscopy (FT-IR) and microanalysis. Attempts at forming ABE2 (A = Cu, Ag; B = Al; E = S, Se), MFeS2 (M = Cu, Zn, Cd), AB(2)E(4) (A = Zn, Cd; B = Cr, E = S; B = V, E = Se) and CdxHgyTe (x + y = 1.00) resulted in phase segregation to mixtures of binary metal chalcogenides with similar morphology to the ternary materials.
|Title:||Solvent mediated metathetical approach to the room temperature synthesis of ternary (mixed metal) chalcogenide materials in liquid ammonia|
|Keywords:||SOLID-STATE, X-RAY, INDIUM, FILMS, CELLS|
|UCL classification:||UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Chemistry|
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