| Summary: | 碩士 === 中國文化大學 === 應用化學研究所 === 86 === The hydrothermai synthesis and characterization of a novel
organic/inorganichybrid compound:viz.[WO3(2,2-bipyridinee)],is
presented. This compound was characteriztion by various
techniques incuding Raman and IR spectroscopy, XRDand
thermogravimetric analysis. Structural analyses of this compound
by Ramanand IR data shows that it consists a novel tungstate
structure with 2,2-bipyridineis coordinated to the tungsten
atom.The X-ray powder diffraction data of thecompound is indexed
to a monoclinic cell with a=14.313(4),b=9.603(2),c=7.288(2)
AB=102.07(2).The structure of [WO3(2,2-bipyridine)] adopts a
chain-like framework consisting of cornerishareed distorted
octahedron (WO4N2) with the 2,2-bipyridineserving as a bidentate
ligand whose ring fanning out from the chain.Upon thermal
threatment,[WO3(2,2-bipyridine)] retains its structural
integrity below 300c,followed by a gradual lossof 2,2-bipyridine
which leads to formation of WO3 around 475c. The
thermaldecomposition is observed to proceed through a
transtional intermediate:viz.[WO4O12(2,2-bipyridine)]whose
stucture is proposeed and discussed.
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