合双螺旋分子的高旋转二基分离
Chan Shu1, Hui Zhang1, Arnon Olankitwanit1
1Department of Chemistry , University of Nebraska , Lincoln , Nebraska 68588-0304 , United States.
Journal of the American Chemical Society
|October 10, 2019
概括
我们合成了一种具有三重基态的奇拉式二极形, 显示出非凡的空气稳定性和强烈的奇罗光学特性. 这一发现为奇拉材料和高旋转化学开辟了新的途径.
科学领域:
- 有机化学
- 材料科学
- 超分子化学
背景情况:
- 烯是具有独特电子和光学特性的奇拉多环芳.
- 高旋转的有机分子对分子电子和旋转电子学的应用很有兴趣.
- 基基构成了具有新功能潜力的具有挑战性的合成标.
研究的目的:
- 合成和描述D2对称连接 bis[5]diazahelicene 的奇拉二基分离.
- 为了研究激素和其中性前体的电子和光学特性.
- 为了确定罗基根的稳定性和配置反转障碍.
主要方法:
- 合成奇拉D2对称联合 bis[5]diazahelicene.
- 使用EPR光谱和DFT计算生成和表征二极根.
- 化高性能液体染色学 (HPLC) 用于反体分辨率.
- 确定单元-三元能量差距 (ΔEST) 和配置反转障碍.
主要成果:
- 成功合成了一种具有高旋转 (三重) 基态的稳定性.
- 双根的分离表现出一个小的单元-三元能量差距 (ΔEST = 0.3 kcal mol-1).
- 通过奇拉HPLC获得高反体纯度,产生稳定的 (P,P) 或 (M,M) 反体.
- 观察到显著的静光特性,与其他已知的合螺旋体相美.
结论:
- 合成的性二基分离是一种稳定,高旋转的有机分子,具有潜在的应用.
- 这项研究表明,创造具有可调节性质的复杂性二极管的可行性.
- 这些发现有助于理解扩展的π系统中的旋转状态和手术现象.
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