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Co3+ and Ir3+ in pure liquid ammonia: Structure and dynamics from ab initio quantum mechanical charge field molecular dynamics
Journal of Molecular Liquids ( IF 6 ) Pub Date : 2020-01-18 , DOI: 10.1016/j.molliq.2019.112205
Wahyu Dita Saputri , Salsabila Syani Sulaiman , Fauzi Ristika Sari , Sri Sudiono , Harno Dwi Pranowo , Muhammad Saleh , Thomas S. Hofer

The solvation properties of Co3+ and Ir3+ in pure liquid ammonia have been investigated via ab initio quantum mechanical charge field molecular dynamics (QMCF MD) simulations. During the simulation time of 20 ps, octahedral [Co(NH3)6]3+ and [Ir(NH3)6]3+ complexes were formed in the first solvation shell without the occurance of ligand exchange. The respective average first shell ion distance of Co3+ and Ir3+ were found to be 2.07 and 2.18 Å, respectively. The solvation properties in the first shells of each system are found in excellent agreement with experimental data. A number of ligands were exchanged between the second solvation shell and the bulk phase in both systems along the simulation. The associated mean residence times of NH3 ligands in the second shell are 3.06 and 2.47 ps for Co3+ and Ir3+, respectively.



中文翻译:

纯液氨中的Co 3+和Ir 3+:从头算量子力学电荷场的分子动力学和结构

通过从头算起的量子机械电荷场分子动力学(QMCF MD)模拟研究了Co 3+和Ir 3+在纯液态氨中的溶剂化性质。在20 ps的模拟时间内,八面体[Co(NH 36 ] 3+和[Ir(NH 36 ] 3+络合物在第一个溶剂化壳中形成,没有发生配体交换。Co 3+和Ir 3+各自的平均第一壳离子距离分别为2.07和2.18Å。发现每个系统的第一壳中的溶剂化性质与实验数据非常吻合。沿着模拟,在两个系统的第二溶剂化壳层和本体相之间交换了许多配体。NH 3配体在第二个壳中的相关平均停留时间对于Co 3+和Ir 3+分别为3.06和2.47 ps 。

更新日期:2020-01-21
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