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Synthesis and Characterization of Fluoro‐ and Chloro‐bimetallic Alkoxides as Precursors for Luminescent Metal Oxide Materials via Sol‐Gel Technique
Author(s) -
Athar Taimur,
Seok Sang Il,
Kwon Jeong Oh
Publication year - 2007
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.200790194
Subject(s) - chemistry , bimetallic strip , heteronuclear molecule , thermal decomposition , luminescence , metal , oxide , elemental analysis , photoluminescence , nuclear magnetic resonance spectroscopy , infrared spectroscopy , inorganic chemistry , chemical engineering , organic chemistry , physics , optoelectronics , optics , engineering
Heterobimetallic alkoxides are broadly recognized as versatile precursors for luminescence materials, and efforts are being made to develop novel routes by applying the concept of geometrical molecular design, for their synthesis and to design a single source precursor suited to photoluminescent 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 the compounds were characterized by elemental analysis, FT‐IR and multinuclear NMR spectroscopies. FT‐IR revealed that the molecular structure of these metal alkoxides was retained to a large extent in 4:1 halogenated alcohol‐benzene solution. The heteronuclear NMR spectroscopy provided useful information about chemical shifts for better understanding the likely structure based on interactions with their coordinate metals. The mass spectra show similar types of fragmentation pattern. SEM‐EDS analyses showed consistency with the formulation. XRD patterns show an enhanced homogeneity at high temperature. TGA measurements show that thermal decomposition occured in steps that depended entirely on the chemical compositions and the synthesis routes. SEM observation reveals that the morphology and particle size strongly depend on synthesis routes for their precursors.