Macromolecules, Vol. 36, No. 19, 2003
Conjugated Copolymers 7003
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Gen er a l P r oced u r es for th e P r ep a r a tion of Cop oly-
m er s Con ta in in g Eu r op iu m Com p lex (P 7-P 12). All the
glassware was prebaked at 110 °C, cooled under vacuum, and
purged with nitrogen. 0.294 mmol of europium triisopropoxide
(C6) in the mixed solvent of benzene and 2-propanol (1:1,
volume ratio) was injected into a flask and then diluted with
dried THF (3 mL). The solution was warmed to 60 °C in an oil
bath. A solution of 0.294 mmol of poly[2,7-(9,9-dihexylfluo-
rene)-co-5-carboxyphenylene-1,3-diyl] (P 4, P 5, or P 6) in dried
THF was added dropwise into the flask by means of a syringe.
The reaction took place immediately, and a white viscous solid
appeared. The reaction mixture was kept under stirring and
refluxing for half an hour under an argon atmosphere. A
calculated amount of â-diketone ligand was dissolved in 5 mL
of THF and added dropwise into the reaction mixture over a
period of 15 min. As the chelation progressed, the viscous solid
redissolved to form a clear solution. After 5 h, the last ligand,
1,10-phenanthroline (anhydrous), in 2 mL of THF was added.
The reaction was continued for another hour. The resulting
solution was concentrated and dropped into water to precipi-
tate the polymer. The crude product was washed thoroughly
with hot ethanol to remove the residue ligands and small
molecular complexes. The polymer was dried in a vacuum oven
at 50 °C for 24 h. Yield: 65-87%.
Ack n ow led gm en t. The authors thank the Agency
for Science, Technology and Research (A*STAR) of
Singapore for financial support under the Project Grant
MCE/00/002.
Su ppor tin g In for m ation Available: Comprehensive data/
results from 1H and 13C NMR, FT-IR, and mass spectroscopic
analyses for compounds C1, C2, C3, and C5 and for copoly-
mers P 1 through P 6; melting point and elemental analysis
data for the four compounds. This material is available free
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