Abstrait

Synthesis And Characterization Of Fluoro And Chloro Bimetallic Alkoxides: As Precursor For Luminescence Metal Oxide Materials Via Sol-Gel Technique

Taimur Athar, Sang Il Seok, Jeong Oh Kwon

Heterometallic alkoxides are broadly recognized as versatile precursor for luminescence materials, efforts are being made to develop novel routes by applying the concept of geometrical molecular design, for their synthesis and to design single source precursors suited to photoluminescence materials. Novel and new series of bimetallic alkoxides has been prepared by metathesis route. They exhibit a lower sensitivity towards hydrolysis and so they are easier to handle as compared to other alkoxides. All compounds were characterized by elemental analysis, FT-IR and multinuclear NMR spectroscopies. FT-IR revealed that the molecular structure of metal alkoxides was retained to a large extent in 4:1 halogenated alcohol-benzene solution. The heteronuclear NMR spectroscopy provides useful information about chemical shifts for better understanding the likely structure based on interactions with their coordinating metals. The mass spectra show similar types of fragmentation pattern. SEM-EDS analyses showed consistent with the formulation. XRD patterns show an enhanced homogeneity at high temperature. TGA measurements show that thermal decomposition occurs in steps that depend entirely on the chemical compositions and the synthesis routes. SEM observation reveals that the morphology and particle size strongly depends on synthesis routes for their precursor.