双刺激响应 [2]具有可调节的振动诱导发射和可切换的循环极化发光的罗塔克桑
Wei-Tao Xu1, Xue Li1, Peicong Wu2
1Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 3663 N. Zhongshan Road, Shanghai, 200062, China.
Angewandte Chemie (International ed. in English)
|January 27, 2024
概括
新的光系统是使用 [2]可调节的振动诱导发射 (VIE) 和可切换的循环偏振发光 (CPL) 的rotaxanes开发的. 这些智能材料对溶剂和离子做出反应,显示了先进光学应用的潜力.
科学领域:
- 超分子化学 超分子化学
- 材料科学 材料科学 材料科学
- 光物理学的光学物理学
背景情况:
- 对于先进的光学材料来说,开发具有可调节排放的刺激响应光系统至关重要.
- 9,14-二-9,14-二二[a,c] (DPAC) 呈现振动诱导发射 (VIE),这是对分子环境敏感的特性.
- [2]rotaxanes提供独特的机械键架构,用于设计复杂的分子机器和响应系统.
研究的目的:
- 通过将DPAC光原体纳入 [2]rotaxane架构来构建新型刺激响应光系统.
- 为了实现精确调节的辐射,包括振动诱导辐射 (VIE) 和可切换的循环极化发光 (CPL).
- 探索这些系统对溶剂和离子刺激的双重响应,用于智能材料的潜在应用.
主要方法:
- 合成DPAC功能化的 [2]rotaxanes,利用机械键来整合光原体.
- 在添加粘性溶剂后,使用 femtosecond 暂时吸收 (TA) 光谱检测振动诱导发射 (VIE) 特性.
- 在离子添加后,在已溶解的性 [2] 罗塔克桑中评估可切换的循环极化发光 (CPL),分析异对称因子 (glum) 的变化.
- 用可拉伸聚合物制成的混合薄膜的制造和测试,以评估在外部拉伸应力下排放变化和CPL.
主要成果:
- 通过DPAC功能化的 [2] 罗塔克桑表明可调节的VIE,由于机械键效应,在粘性溶剂中呈现白光辐射.
- 奇拉尔 [2] 罗塔克桑在离子添加时显示可切换的CPL,glum值显著增加,并且具有很好的可逆性.
- 合聚合物薄膜显示出显著的排放转移,从白光到浅蓝光,在拉力应力下glum增加6.5倍.
结论:
- 这项工作提出了一个新的策略,用于设计具有可调节光和双刺激响应的分子系统.
- 开发的 [2]rotaxane 平台为构建智能性发光材料提供了一种新的方法.
- 这些发现突出了为实际应用创造具有可控制光学特性的先进材料的潜力.
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