在聚烯的Si链上正电荷载体的动力学
Shu Seki1, Yoshiko Koizumi, Tomoyo Kawaguchi
1Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan. seki@sanken.osaka-u.ac.jp
Journal of the American Chemical Society
|March 18, 2004
概括
这项研究通过脉冲放射溶解量化了聚西兰基的阴离子吸收. 较长的聚合物链和更多的环增强了吸收,表明有效的分子间孔转移.
科学领域:
- 聚合物化学 聚合物化学
- 光物理学的光学物理学
- 辐射化学 辐射化学
背景情况:
- 聚烯是基于的聚合物,具有独特的电子特性.
- 了解它们的基离子行为对于材料科学和电子学的应用至关重要.
- 短暂的吸收光谱学提供了对短暂的激进物种的洞察力.
研究的目的:
- 量化确定聚西兰基离子的摩尔灭绝系数和振荡器强度.
- 研究聚合物细分长度和环替代对这些特性的影响.
- 阐明环在分子间电荷转移过程中的作用.
主要方法:
- 纳米秒脉冲放射溶解被用来产生和研究短暂的多基离子.
- 暂时吸收光谱法用于测量吸收波段.
- 使用N,N,N',N'-四甲基-p-二 (TMPD) 的反应用于校准.
主要成果:
- 在氧和中观察到一个强大的过渡吸收带,用于聚烯基基离子.
- 聚烯基基离子的摩尔灭绝系数从3.3 x 10 ((4)) 增加到2.0 x 10 ((5) M ((-1) cm ((-1)) 随着聚合物段长度的增加.
- 振荡器的强度随着环的数量增加而增加,这表明电子状态的移位.
结论:
- 聚烯基基离子表现出显著的短暂吸收.
- 聚合物细分长度和环替代直接影响聚烯基基离子的电子性质.
- 环在促进聚烯中分子间孔转移方面发挥着至关重要的作用.
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