| Summary: | 碩士 === 國立中央大學 === 化學系 === 85 === ABSTRACTThis thesis decribes the prepararion,
Characterisation and thermal behaviour studies in terms of
liquid crystallininty for a series of b-diketonphenols as
ligand and their bimetallic complexes with transition metals.
These bimetallic compounds are based on b-diktonate structures
with totallly six or eight alkoxy groups as flexible side chains
and thebimetallic centre as a rigid core. 1H and 13C NMR
spectroscopes were used to identify the structures, and to
confirm their purity of organic compounds. The metal complexes
were mainly characterised by 1H NMR, IR, spectra and elemental
analysis.The thermal behaviour and liquid crystallinity of these
metal complexes were also studies an d investigated based on DSC
analysis, polarised optical microscope. Data showed that metal
complexes with longer or more side chains exhibited higher
stabilities and wider temperature of mesophases. Under optical
microscope those complexes exhibited pseudo focal conic texturee
with was identified as discotic hexagonal disordered phases.
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