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16.8 mmol) was slowly added over 1 h to a stirred solution
of the two monomers at the chosen molar ratio (see below)
in 25 cm3 dry THF that was cooled to 0 °C and under N2
atmosphere. The mixture was stirred at room temperature
for 20 h. The polymerization solution was poured into
500 cm3 methanol. A crude polymer precipitated out,
which was redissolved in chloroform and reprecipitated
from methanol and then extracted in a Soxhlet apparatus
with methanol to remove the impurities and oligomers.
After drying filtration in vacuum, a bright red solid was
obtained. In this paper, we adopt different ratios of starting
monomers for the synthesis of the two groups of polymers.
The proportions for P1–P3 are monomer A (0.2, 0.2,
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–OCH3), 1.95–1.94 (m, –OCH2CH), 1.55–1.25 (m, –CH2),
0.89 (t, –CH3) ppm; 13C NMR of P1 (100 MHz, CDCl3):
d = 10.09, 13.99, 22.42, 30.50, 38.12, 39.56, 55.79, 65.29,
109.01, 124.40, 134.56, 144.22 ppm; 13C NMR of P4
(100 MHz, CDCl3): d = 8.85, 17.44, 24.45, 32.22, 40.01,
51.73, 61.73, 110.76, 122.41, 137.91, 143.84, 145.51,
148.69 ppm.
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Acknowledgments This work was supported by the National Nat-
ure Science Foundation of China (No. 61177029), the Science
Foundation of the Ministry of Education Key Laboratory for the
Synthesis and Application of Organic Functional Molecules, Hubei
University, Peoples’ Republic of China.
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