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8097232 
Journal Article 
Synthesis and optical properties of poly[6'-(N-carbazolyl)hexyl-2- ethynylpyridinium bromide] 
Gal, YS; Lee, SS; Bae, JS; Kim, BS; Jang, SH; Jin, SH 
1999 
Yes 
Bulletin of the Korean Chemical Society
ISSN: 0253-2964
EISSN: 1229-5949 
20 
4 
451-455 
English 
The polymerization of 2-ethynylpyridine by alkyl bromide carrying carbazole moiety, 6-(N-carbazolyl)hexyl bromide, relatively proceed well to give the corresponding poly[6'-(N-carbazolyl)hexyl-2-ethynylpyridinium bromide) in high yields under DMF reflux conditions without any initiator or catalyst. This polymerization was influenced upon the initial monomer concentration. The polymer yields and inherent viscosities of the resulting polymers were in the range of 34-85% and 0.11-0.21 dL/g, respectively. Instrumental analyses using NMR, IR, and UV-visible spectroscopies and elemental analysis indicated that the resulting polymer has a conjugated polymer backbone system carrying pyridine and n-hexyl carbazole moiety. The polymers were mostly brown powders and completely soluble in DMF, DMSO, nitrobenzene, and formic acid. The photoluminescence spectrum of the dilute polymer solution with the excitation at 383 nm exhibited two sharp peaks at 495 and 540 nm.