Solvothermal Syntheses, Crystal Structures And Properties Of Main Group Chalcogenidometalates

Recently extensive interest has been focused upon the Main Group chalcogenidometalates due to their promising photoconductivity, photoluminescence and nonlinear optical properties. The solvothermal reaction is becoming a versatile route to the chalcogenidometalates. Exploring influence of solvothermal conditions is important to investigation of the structure for chalcogenidometalates. The incorporation of transition metals or lanthanide metals with chalcogenidometalates will not only give rise to the change of structure, but also endues chalcogenidometalates with new properties. The solvothermal method will be a new access to the synthesis of lanthanide-contained chalcogenidometalates, which are traditionally prepared by solid-state reaction at high temperature. So, the synthesis and characterization of the lanthanide-contained chalcogenidometalates are of both theoretical and practical significance.In the thesis several synthetic systems containing Group 14 or 15 metal elements and chalcogen (S and Se) were investigated under mild solvothermal conditions. In the presence of structure-directing agent, such as organic amines or metal complex cations, a series of chalcogenidometalates including elements germanium, tin, arsenic, and antimony were synthesized by the solvothermal methodology. The synthetic system in en was systematically investigated under solvothermal conditions. In particular, we have explored the synthetic systems Ln₂O₃/As/Se and Ln₂O₃/Sb/S (Ln = lanthanide) in superheated amine, in which a number of novel selenidoarsenates and thioantimonates containing lanthanide metals were prepared. These compounds are the first examples of lanthanide-contained chalcogenidometalates synthesized by the solvothermal method. The solvothermal method is a new route to lanthanide-contained chalcogenidometalates. The chalcogenidometalates...