| Chalcogenidoantimonates have potential applications in a wide area,such as thermoelectric materials,photocatalysis,ion-exchange,solar cells and chemical sensors,therefore,the research on the synthesis,structure and properties of the chalcogenidoantimonates has been attracting much attention.Solvothermal method has become the main method of synthesizing the chalcogenidoantimonates compounds.The Solvothermal reaction parameters,the types of solvents and structure-directing agents show much influences on structure and properties of the chalcogenidoantimonates.In this thesis,the TM/Sb/S?Se?/phen?TM/Sb/S?Se?/en and Ln/Sb/S?Se?/polyamine systems were investigated in different solvent with metal complexes as the structure-directing agents and several chalcogenidoantimonates were prepared.The results are listed below.1.Thetransition-containingthioantimonates[Co?phen?3][Sb4S5?S4?2]?1?,[Co?phen?3]2[Sb18S29]?2?,[H3O][Co?phen?3]SbS4·9H2O?3?and[Fe?phen?3]Sb6Se10?4?were synthesized in CH3OH/H2O and H2O as solvents using aromatic amine phen as ligand.The influence of solvent and reaction temperature on the structures of chalcogenidoantimonates anions was discussed.2.The transition-containing thioantimonates?III?[Co?en?3]2Sb2S5?5?polyamine[Zn?en?3]2Sb2S4?6?and selenidoantimonates?V?[Hen][Co?en?3]SbSe4?7?and[Hen][Zn?en?3]SbSe4?8?were synthesized using en as the ligand.The different solvent influence to S and Se systems were discussed.3.The lanthanide-containing chalcogenidoantimonates[Sm?peha??SbSe4?]n?9?,[Eu?peha??SbSe4?]?10?,[H2tepa][{Sm?tepa??SbSe4?}2?OH?2]?11?and[H2tepa][{Tm?tepa??SbSe4?}2?OH?2]?12?were synthesized in pentaethylenehexamine?peha?and tetraethylenepentamine?tepa?,respectively.The influence of the denticity of ethylene polyamines and radius and size of lanthanide ion on the coordination mechanism of central atom was discussed.4.The structures of the compounds were determined by the single crystal diffractometer,and the compounds were characterized by elemental analysis,infrared spectroscopy and PXRD.The optical properties of the compounds were determined by solid-state ultraviolet absorption spectroscopy and thermostability was measured by thermogravimetric analysis. |
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