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振动依赖的双光 Cu 4 纳米集群具有显著的平色色行为

Xiao-Jing Zhang¹, Meng-En Sun^1,2, Fang Sun³

¹Henan Key Laboratory of Crystalline Molecular Functional Materials, Henan International Joint Laboratory of Tumor Theranostical Cluster Materials, Green Catalysis Center, and College of Chemistry, Zhengzhou University, 450001, Zhengzhou, China.

Angewandte Chemie (International ed. in English)

|May 1, 2024

概括

原子精确的铜纳米集群 (CuNCs) 具有双重发射. 对一个新的CuNC施加压力,发现键和环振动是这种现象的关键.

科学领域:

纳米材料科学科学纳米材料科学
摄影化学的使用.
固态化学固态化学

背景情况:

在原子精确的铜纳米集群 (CuNCs) 中的双排放 (DE) 具有显著的兴趣,但潜在的机制仍然不清楚.
在Cu NC中激发状态过程是复杂的,阻碍了对其光物理性质的充分理解.

研究的目的:

为了合成一种新型的基尼尔屏蔽铜纳米集群,表现出双重发射.
首次使用水静压来研究CuNC中的双排放机制.

主要方法:

一个新的 [Cu4(PPh3) 4(CC-p-NH2C6H4) 3) PF6 (Cu4) 纳米集群的合成.
应用水静压来研究排放特性和晶体结构的变化.
角度分散的同步龙X射线衍射分析压力下的结构变化.
在现场高压拉曼和振动分辨率的辐射光谱.

主要成果:

合成的Cu4纳米团表现出双发射和压色 (蓝色到色).
增加的压力导致更高能量的排放峰值消失,并观察到加强的键 (C-H⋅⋅⋅N,N-H⋅⋅⋅N).
角度分散的同步子X射线衍射显示,在压力下,集群间距离缩小,外围连接体更接近.
光谱分析确定了环C=C拉伸振动作为DE的来源.

结论:

液压压力可以调节CuNCs的双发射特性.
增强的键和连接体振动在双排放机制中起着至关重要的作用.
环C=C拉伸振动被确定为这些CuNC中的双排放的结构起源.

关键词:

铜纳米集群铜纳米集群双排放的二重排放是什么意思液压压力液压压力液压压力振动振动振动振动

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