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通过空间相互作用实现的非结合树脂的NIR集群发光

Ziteng Zhang^1,2,3, Jianyu Zhang⁴, Zuping Xiong^1,5,3

¹Department of Polymer Science and Engineering, Zhejiang University, 310058, Hangzhou, China.

Angewandte Chemie (International ed. in English)

|May 30, 2023

概括

研究人员使用集群发光 (CL) 和通过空间相互作用 (TSI) 开发了新的红色和近红外发射树脂. 这一突破增强了非结合的光原体,提供了高量子产量和实际应用.

科学领域:

材料科学材料科学材料科学
光物理学的光学物理学
聚合物化学聚合物化学

背景情况:

非结合分子中的集群发光 (CL) 和穿越空间相互作用 (TSI) 提供了独特的光物理特性,与结合系统不同.
由于固有的分子局限性和不发达的结构-性质关系,从非结合发光剂中实现红色和近红外 (NIR) 辐射仍然是一个重大挑战.

研究的目的:

设计和合成具有集群发光的新型非结合树脂.
从这些工程材料中获得高量子产量的红色和近红外辐射.
阐明穿越空间相互作用在非合聚合物中启用集群发光的作用.

主要方法:

六种树脂的合成采用分子工程策略:增加 TSI 单位,并结合电子捐赠/提取组.
光物理性质的表征,包括集群发光和辐射光谱.
理论分析以了解 TSI 的机制及其对 CL 的影响.

主要成果:

所有合成的树脂都表现出集群发光 (CLgens).
该研究报告了首个CLgens表现出近红外辐射 (λem ≥680nm) 的例子,其绝对量子输出率高达47%.
实验和理论发现确定了两个关键的TSI (局部激发和电荷转移状态),对CL至关重要,可以通过结构和电子修改进行控制.

结论:

开发的树脂作为有效的非结合发光剂,具有可调节的NIR发射特性.
穿越空间相互作用,特别是局部激发和电荷转移状态,对于在这些非合聚合物中实现CL至关重要.
这项研究为操纵非合聚合物中的 TSI 和 CL 提供了可行的策略,增强了树脂作为先进发光材料的实际实用性.

关键词:

聚合物发光的发光源.接近红外的发光光源是近红外的发光.烯酸树脂烯酸树脂是一种烯酸树脂.通过空间的互动.

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