| 학회 | 한국고분자학회 |
| 학술대회 | 2005년 봄 (04/14 ~ 04/15, 전경련회관) |
| 권호 | 30권 1호, p.521 |
| 발표분야 | 고분자 합성 |
| 제목 | Synthesis and Electro-Optical Properties of Ionic Conjugated Polymers with Different Counter Ions |
| 초록 | The ionic polyacetylenes have potentials as materials for mixed ionic and electronic conductivity, energy storage devices such as batteries, permselective membrane, light-emitting devices due to their extensive conjugation and ionic nature. The synthetic process for pyridine-based ionic conjugated polymers by the simple reaction of 2-ethynylpyridine and alkyl halides has been known as a facile synthetic method for ionic conjugated polymers. In 1991, Blumstein et al reported the synthesis of the mono- and di-substituted ionic polyacetylenes through the activated polymerization of ethynylpyridines with alkyl halides [38,39]. After then, there have been many studies on the synthesis of various ionic conjugated polymers having different functionalities. In our previous work, we studied on the synthesis and electro-optical properties of poly(2-ethynylpyridinium bromide) having propargyl side chain (PEP-Br) by the polymerization reaction of 2-ethynylpyridine and propargyl bromide. Now we report on the synthesis of the same main chain polymers with different counter anions instead of bromide ion by using the ion-exchange reaction and the electro-optical properties of the resulting ionic conjugated polymers. Poly(2-ethynylpyridinium bromide) with propargyl side chain (PEP-Br) was prepared by the direct polymerization of 2-ethynylpyridine and propargyl bromide under mild reaction conditions without any additional initiator or catalyst. The ion-exchanged products of PEP-Br were prepared by the simple ion-exchange reaction using ion-exchange reagents such as NaBPh4, NaClO4, and NaN3. The ion exchanged three polymers (PEP-PC, PEP-AZ, PEP-TPB) were found to be mostly insoluble in water and methanol, whereas the PEP-Br and PEP-TsO were completely soluble in the above solvents. Various instrumental analyses on the polymer structures indicated that the present polymers have a conjugated polymer backbone system having N-propargyl pyridyl substituents with different counter ions. The photoluminescence intensity of the present ionic conjugated polymers increased as the temperature was increased. The photoluminescence peaks of the present ionic conjugated polymers were found to be located at 610-720 nm, depending on the counter anions. |
| 저자 | 제갈영순1, 진성호2, 윤남균3, 김봉식4 |
| 소속 | 1경일대, 2부산대, 3국방과학(연), 4영남대 |
| 키워드 | Conjugated polymer; polyelectrolyte; ion-exchange reaction; photoluminescence; characterization |
