从染料修饰的 (NCN) - - 斯木钉酸盐复合物的双光和光排放
Marcel Geppert1, Kai Jellinek1, Michael Linseis1
1Fachbereich Chemie, Universität Konstanz, 78457 Konstanz, Germany.
Inorganic chemistry
|July 30, 2024
概括
我们合成了新的染料修饰的斯木钉复合物. 这些复合体表现出独特的光和光特性,取决于连接体的选择和度,聚合诱导的系统间交叉影响它们的行为.
科学领域:
- 有机金属化学 有机金属化学
- 光物理学的光学物理学
- 材料科学 材料科学 材料科学
背景情况:
- 木具复合体因其独特的电子和光物理性质而引起人们的兴趣.
- 金属复合体中的调联体环境可以显著改变它们的光学特性.
- 了解结构属性关系对于设计新的发光材料至关重要.
研究的目的:
- 为了合成和表征新的染料修饰的斯木钉复合物,其中包含mercaptocoumarin或mercaptopyrene连接物.
- 研究这些新复合物的光物理性质,包括吸收,光和光.
- 阐明控制它们发光行为的机制,特别是度依赖效应和聚合现象.
主要方法:
- 合成和表征四个新的 (NCN) Bi器复合体.
- 使用紫外线/紫外线吸收光谱和光发光 (PL) 光谱在可变温度 (77K和室温) 上进行光物理研究.
- 在模型系统上使用时间依赖密度函数理论 (TD-DFT) 的计算调查.
主要成果:
- 复合体呈现出特征性的吸收带,这些吸收带归因于联结体中心和金属到联结体的电荷转移过渡.
- 基于库马林的复合物在77K显示稳定的绿色光,而基于烯的复合物则显示度和激发依赖的辐射.
- 皮雷尼复合体表现出聚合诱导的系统间交叉 (AI-ISC),在较高度下导致红色光,这是由于π堆积和排卵体形成的原因.
结论:
- 合成的斯木钉复合体提供可调节的光物理性质,基于内置的染料连接体.
- 聚合诱导的系统间交叉被确定为控制含复合体发光的关键机制.
- 这些发现提供了对新型发光材料的设计的见解,这些材料通过联结物修饰和聚合具有可控制的排放特性.
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