类似的铜纳米集群 (Cu16/17) 具有两个电子超原子和混合价值铜 (II) /铜 (I) 和铜 (I) /铜 (0) 字符
Shibaditya Kumar1, Saikat Mishra1, Aniruddha Das1
1Department of Chemistry, National Institute of Technology Durgapur, Mahatma Gandhi Avenue, Durgapur 713209, India. akpatra.ch@nitdgp.ac.in.
Nanoscale
|November 26, 2024
概括
研究人员合成了具有独特混合价值 (MV) 状态的新型铜纳米集群 (CuNCs),包括Cu0. 他们展示了首次由氧化驱动的逆协调复合体 (ICC) 转化为超原子CuNC的自发转化.
科学领域:
- 无机化学 无机化学
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
背景情况:
- 铜纳米集群 (CuNCs) 具有混合价值 (MV) 状态 (CuII/CuI或CuI/Cu0) 通常由特定的配体稳定.
- 具有相同架构但不同的MV状态的同类CuNC在很大程度上是未知的,限制了对比研究.
研究的目的:
- 合成和表征一系列具有常见芳香醇-S供体联体的高核度铜集群.
- 为了研究表现出不同混合价值状态的铜纳米集群,特别是CuII/CuI和CuI/Cu0.
- 探索这些新型铜纳米集群的结构和电子特性及其相互转换.
主要方法:
- 三个不同的铜纳米集群的合成:[L4) 12CuII15<μ4-S)
(3). - 对Cu16NCs (1和2) 的结构分析,这些NCs (1和2) 在Cu12S12截断的八面体内具有中央硫化物-S桥梁四铜核,将它们分类为反向协调复合体 (ICCs).
- 频谱电化学研究,高分辨率XPS和Cu LMM Auger光谱学,以确定电子结构和MV状态 (CuII/CuI为1,CuI/Cu0为2).
主要成果:
- 成功合成了Cu16ICCs (1和2) 和一个超原子Cu17NC (3),由芳香醇-S联体稳定.
- 在极性溶剂中,首次自发的氧化剂驱动的ICC 1转化为超原子Cu NC 3的演示,涉及结构重组.
- 在NCs 1和2中,观察了二醇C-S键裂变在硫化S核存在时的第一个证据.
结论:
- 本文介绍了含有Cu0的ICC (2) 和由芳香醇-S连接体稳定的超原子CuNC (3) 的第一个例子.
- 该研究报告了第一个由氧化引发的自发性ICC转化为超原子NC转化 (1 → 3),而不需要减少剂.
- 这些发现为铜纳米集群的结构多样性,电子性质和反应性提供了新的见解,特别是在反协调复合体和超原子结构方面.
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