Abstract
The reaction of n-propylisocyanate with fluorescein (FLU) has been
performed in N,N-dimethylacetamide (DMAc) in the presence of triethylamine
and the resulting bis-adduct has been obtained in high yield and finally was
used as a model compound for the polymerization reactions . The step-growth
polymerization reaction of the monomer FLU with hexemethylene
diisocyanate (HMDI), isophorone diisocyanate (IPDI), and toluene-2,4-diisocyanate (IDI) was carried out in DMAc solution and in the presence of
pyridine as a catalyst . The above polymerization reactions lead to the
formation of novel aromatic-aliphatic polyurethanes having fluorescein
moieties in the main chain . The resulting novel polyurethanes have an
inherent viscosity in a range of 0 .08—0.23 dLg""
1
and show light-violet
fluorescence property and could be used as photoactive polymers for labeling
materials . These polyurethanes were characterized by IR, 1 H NMR, TGA!
DTG, DSC and elemental analyses . Some physical properties of this novel
polymers are reported.
Key Words