在RuC,RhC,OsC,IrC和PtC的离子电离能量
Dakota M Merriles1, Yexalen Barrera-Casas1, Annie S Knapp1
1Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, USA.
本研究精确地测量了五种过渡金属碳化物 (RuC,RhC,OsC,IrC,PtC) 的电离能,使用双光子电离. 这些发现为了解催化过程中的金属碳键提供了关键的热化学数据.
科学领域:
- 物理化学 物理化学
- 计算化学计算化学
- 材料科学 材料科学 材料科学
背景情况:
- 晚期过渡金属-碳键在有机金属化学和催化过程中至关重要.
- 这些键的精确热化学数据在科学文献中很少.
研究的目的:
- 通过实验确定RuC,RhC,OsC,IrC和PtC的电离能 (IEs).
- 为这些重要的金属碳化物提供基本的热化学数据.
- 研究这些物种的电子结构和化学结合.
主要方法:
- 两光子电离谱法用于测量电离值.
- 高级量子化学计算 (合集群方法).
- 完整的基础集推断和旋转轨道效应校正.
主要成果:
- 赋值的电离能:IE(RuC) = 7.439(40) eV,IE(RhC) = 7.458(32) eV,IE(OsC) = 8.647(25) eV,IE(IrC) = 8.933(74) eV,IE(PtC) = 9.397(32) eV. 电离能: 电离能: 电离能: 电离能: 电离能: 电离能: 电离能: 电离能: 电离能
- 实验结果通过量子化学计算得到验证.
- RuC,RhC,OsC和IrC的IEs与它们各自的金属原子IEs密切匹配.
结论:
- Ru,Rh,Os和Ir的 (n + 1) s电子在各自的碳化物中极少参与结合.
- 这项研究确定了过渡金属碳化物的主要热化学数据.
- 提供了对晚期过渡金属碳化物的电子结构和结合的见解.
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