Layered metal chalcogenides Synthesis

Chen L, Xia SQ, Corbett JD (2005) Metal-rich chalcogenides. Synthesis, structure, and bonding of the layered Lui]Te4. Comparison with the similar ScgTe3 and HnSe4. Inorg Chem 44 30573062... 

Li J, Badding ME, DiSalvo FJ (1992) New layered ternary niobium teUurides Synthesis, structure, and properties of NbMTe2 (M = Fe, Co). Inorg Chem 31 1050-1054 Tremel W, Kleinke H, Derstroff V, Reisner C (1995) Transition metal chalcogenides New views on an old topic. J Alloy Compd 219 73-82... 

In the oxide literature, there are several reviews specific to the different families, such as layered transition metal oxides and metal phosphonates. Synthesis of metal nitrides has been discussed by Di Salvo. Precursor synthesis of oxides, chalcogenides and other materials is being pursued with vigour. - Thus, single-molecule precursors of chalcogenide containing compound semiconductors have b n developed. Kanatzidis has reviewed the application of molten poly-chalcophosphate fluxes for the synthesis of complex metal thiophosphates and selenophosphates. 

Thus far, only metal-oxide nanotubes have been synthesized by this process. Whereas crystalline nanotubes were obtained from 2D (layered) oxides, various 3D oxide compounds resulted in semicrystalline or amorphous nanotubes, only. In principle, this kind of process could be extended to the synthesis of nanotubes from chalcogenide and halide compounds in the future. 

The general tendency toward synthesis of thinner films, driven both by applications and by the more microscopic analytical techniques, is well illustrated in this group of compounds. The interdiffused multilayer process deposits alternate layers of metal and chalcogenide, which are heated to promote direct reaction. An example is the growth of NbsSe4 from films of tens of nanometers This procedure is also successful for MoSc2. Because of the volatility of selenium, the last layer is metal, used as a cap. ... 

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