Solvothermal Synthesis And Characterization Of Novel Chalcogenides

Solvo(hydro)thermal synthesis technique is an effective inorganic synthetic method to creat new phases in mild conditions. Low-temperature solvothermal technique is normally used to produce compounds having low-demension structures (0-D,1-D,2-D) which are metastable phases in thermodynamics. The synthesis polynary Chalcogenides have been received much attention in solid state chemistry. Their special physical and chemical properties related to low-dimension structures have a great potential applications in technologies.In this thesis, a rational solvothermal synthesis technique has been developed to synthesize the many quaternary Chalcogenides in which the structure and properties of [Ni(en)₃]₂Sn₂Se₆ have been characterized in detail.The compound [Ni(en)₃]₂Sn₂Se₆ crystallizes in orthorhombic, space group Pbca ,the unit cell parameters, a=15.2885(13) A, b= 11.9367(10) A , c= 19.2389(16) A ,v=3511.0(5) A³, R =0.0300, ωR = 0.0647. The crystal has 0-D structures which contains isolated [Sn₂Se₆]^4- and [Ni(en)₃]²⁺ are packed by electrostatic interaction.The effect factors of synthesis were studied in detail. On the basis, some new quaternary selenostannate, selenogermanate, thiostannate have been synthsized successfully. They were also charecterized by SEM-EDS, IR, XRD.