| Summary: | 碩士 === 國立交通大學 === 應用化學系 === 83 === The novel convergent growth approach to topology macromole
-culars based on dendritic fragments is described.The polyether
dendritic fragments are prepared by starting from what will bec
-come the periphery on the macromolecular and progressing
inward .In here,we used convergent growth approach to synthesis
containferrocene functional group at the periphery of the
drndritic mac -romolecular.In the first stage,2 mole of
3-bromopropanyl ferro-cene is condensed with 1 mole
3,5-dihydroxylbenzyl alcohol,under phase-transfer condition.
After transformation of the benzylic al -cohol functionality of
the growing moleculars into the correspo -nding bromide.The
procedure is repeated with stepwise addition of the monomer
followed again by activation of benzylic site.In the other way,
the resulting dendritic wedge,in their benzyl brom -ide can be
coupled to polyfuctional core 1,1,1-tris(4-hydroxyph -yl)ethane
to form the hyperbranched macromolecular.The dendri- mer
structure can be characterized by use of spectroscopic tech-
nology.At each growth step.their macromolecular weight about
two fold,the molecular structure become progressively denser
and more compact,and have a very low despersity.Electrochemical
mea- sures show that all of the dendritic macromolcular show a
singlereversible ovidation process.Every ferrocene at the
periphera po
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