超原子电子配置预测Au25(SR) 18纳米集群的热稳定性
Marcus A Tofanelli1, Christopher J Ackerson
1Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, USA.
Journal of the American Chemical Society
|September 28, 2012
概括
黄金纳米团稳定性与电子配置有关. 将Au(25) 纳米团氧化到极端状态,降低了它的热稳定性,与更复杂的Au(144) 集群不同.
科学领域:
- 无机化学 无机化学 有机化学
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
背景情况:
- 结合物稳定黄金纳米集群由于充满了超原子电子外,表现出异常稳定性,实现了超原子电子外的稳定性.
- 贵族气体超原子的存在
- 电子的配置. 电子的配置.
研究的目的:
- 为了研究金纳米集群的氧化状态和热稳定性之间的关系.
- 探索如何改变电子配置影响纳米团稳定性.
主要方法:
- 差分扫描热量计 (DSC) 用于测量金纳米集群在各种氧化状态下的热稳定性.
- 采用电化学方法来操纵Au(25) ((SR) ((18) ((-) 和Au(144) ((SR) ((60) 纳米集群的氧化状态.
主要成果:
- 氧化Au(25) ((SR) ((18) ((-) 纳米团从其类似贵重气体的状态 (1S(2) 1P(6)) 转变为极端 (1S(2) 1P(5) 和二极端 (1S(2) 1P(4) 配置,导致热稳定性降低.
- 144) SR) 60) 星团在五个探测状态中显示了氧化状态和热稳定性之间的更复杂的相关性.
结论:
- 电子配置显著影响金纳米集群的热稳定性,偏离高贵气超原子配置,导致稳定性降低在某些情况下.
- 氧化状态和稳定性之间的关系是集群特定的,正如Au(25) 和Au(144) 纳米集群的对比行为所证明的那样.
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