Syntheses And Characterization Of Heterometallic Iodoplumbates Directed By Solvated Cations

Semiconductive iodoplumbates possess rich structures andexcellent tunable optical and electrical properties. Recently,introducing transition metal into iodoplumbates has become aneffective way to modulate their structures and properties due to thesignificantly different structural and electronic features of secondmetal, and attracted much attention.In this thesis, a series of iodoplumbates were prepared by tuningreaction medium and solvated forms of Y(III) and characterized bysingle-crystal and powder X-ray diffraction, IR, and UV-Vis spectra.Based on the structural analysis, crystallizing rules of heterometalliciodoplumbates and consequently semiconductive/thermochromicproperties are investigated. Results showed that changes of solventscan modulate the composition and symmetry of solvated cations andconsequent structural directing effects, which further alter the phasedistribution among various interacting species and final crystallizingproducts. In addition, the change of heterometal (Cu(I) and Ag) canalso influence structures and properties of heterometalliciodoplumbates, which is obviously exemplified by thermochromicdifference bewteen copper iodoplumbates and silver iodoplumbates.