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논문 기본 정보

자료유형
학술저널
저자정보
Ji Hoon Lee (Keimyung University) Young Tae Park (Keimyung University)
저널정보
계명대학교 자연과학연구소 Quantitative Bio-Science Quantitative Bio-Science Vol.42 No.1
발행연도
2023.5
수록면
1 - 8 (8page)

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초록· 키워드

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Stille coupling copolymerization of 1,1-dialkyl-2,5-dibromo-3,4-diphenyl-siloles (R=Et, i-Pr, n-Hex, 1a-c) with bis(tributylstannyl)acetylene in the presence of PdCl2(PPh3)2 catalyst and toluene solvent provided poly[(1,1-dialkyl-3,4-diphenyl-2,5-silolene)-co-(ethynylene)]s (R=Et, i-Pr, n-Hex, 2a-c) as blackish solids, respectively. All structures of the prepared silole-ethynyl copolymers were characterized by 1H NMR, 13C NMR, FT-IR, and UV-vis spectral data, and thermal stabilities were measured using TGA. The synthesized silole copolymers were consistent with the structures proposed in the reaction scheme 1. The band gaps of 2a-c were measured from UV-vis spectral data, resulting in 1.73, 1.74, and 1.73 eV, and compared with calculated values of 1.62, 1.80, and 1.66 for the trimeric forms of the model compounds, respectively; we applied the Density Functional Theory using Gaussian 09W and B3LYP/6-31G basis. The maximum absorption wavelengths of 2a-c were measured between 555 and 575 nm, indicating that the polymers might be conjugated through the copolymer main chain. The prepared silole-ethynyl copolymers 2a-c were very stable, with a weight loss of less than 2% up to 200℃ in nitrogen atmosphere.

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ABSTRACT
1. Introduction
2. Experimental Section
3. Results and Discussion
4. Conclusion
References

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UCI(KEPA) : I410-ECN-0101-2023-047-001541327