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温度控制的选择性银纳米集群的形成及其转化为相同的产品

Zhi Wang¹, Yuchen Wang², Tian-Yang Xu¹

¹School of Chemistry and Chemical Engineering, State Key Laboratory of Crystal Materials, Shandong University, 250100, Ji'nan, People's Republic of China.

Angewandte Chemie (International ed. in English)

|April 6, 2024

概括

温度控制使得选择性合成的银纳米集群 (Ag54和Ag33). 较低的温度产生转移稳定的Ag54,而较高的温度有利于稳定的Ag33,影响它们的转化途径.

科学领域:

* 纳米材料科学科学纳米材料科学
* 无机化学无机化学
* 物理化学物理化学

背景情况:

* 原子精确的银纳米集群 (AgNCs) 具有独特的特性,受其结构的影响.
* 控制特定AgNC阶段的合成仍然是一个挑战.
*了解结构稳定性对于预测AgNC行为至关重要.

研究的目的:

* 研究反应温度对Ag54和Ag33纳米集群的选择性合成的影响.
* 为了比较Ag54和Ag33.3的结构稳定性.
* 探索不同稳定性如何影响纳米集群转换反应.

主要方法:

* 在不同温度 (20-80°C) 下合成银纳米集群.
*电喷离子质谱仪 (ESI-MS) 用于稳定性分析.
*密度函数理论 (DFT) 计算用于理论支持.
* 1,4-bis(pyrid-4-yl) 诱导的转化反应的研究.

主要成果:

*通过调节温度,选择性地合成了Ag54 (超稳定,低温) 和Ag33 (稳定,高温) 的纯相.
*Ag33显示出比Ag54更高的稳定性,ESI-MS和DFT证实了这一点.
* Ag54经历了破裂重组到Ag31,而Ag33通过连接物交换转化为Ag31.
* Ag54和Ag33都显示出远程激光点火的潜力.

结论:

*反应温度是控制AgNC合成相纯度和结构结果的关键因素.
*Ag54和Ag33的不同稳定性决定了它们的转化机制.
* 这项研究提供了关于AgNCs阶段选择性合成和转化途径的见解.

关键词:

在ESI-MS中使用ESI-MS.光热转换的光热转换银色纳米集群的银色纳米集群结构转型结构转型温度驱动的隔离方式

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