Synthesis and characterisation of lamellar ZnS nanosheets containing intercalated diamines

A solvothermal method has been used to preparehybrid inorganic-organic composites with a lamellar structure in which layers of wurtzite ZnS are separated by intercalated diamine molecules. A hybrid composite prepared with diethylenetriamine has been isolated and characterisedand its structure and properties compared with those of the composite prepared using ethylenediamine. Comparative structural and morphological studies of the two lamellar hybrid composites are described on the basis of powder XRD, electron and scanning probe microscopies and thermal analysis of the materials

A QUATERNARY ThCr2Si2 TYPE STRUCTURE: CRYSTAL GROWTH OF KCuZnTe2 FROM MOLTEN SALT

KCuZnTe 2, a quaternary layered metal telluride, was synthesized from a potassium polytelluride flux at 450\ub0C. Single crystal X-ray diffraction analysis showed that the structure of this compound belongs to tetragonal crystal system, space group I4/mmm (no. 139). The unit cell parameters are: a = 4.269(1) \uc5, c = 14.912(2) \uc5, V = 271.76(10) \uc5 3, Z = 2. Direct synthesis at 650\ub0C produced a yield of approximately 25%. KCuZnTe 2 is one of only a few quaternary mixed-metal tellurides having the ThCr 2Si 2-type structure. It is composed of (CuZnTe 2) - layers and K + cations located between the layers. Cu and Zn form a mixed-metal square lattice within each layer by sharing the same crystallographic site. KCuZnTe 2 is electron precise and is therefore most likely a semiconducting material