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Saputri WD, Wijaya K, Pranowo HD, Hofer TS. The Jahn-Teller effect in mixed aqueous solution: the solvation of Cu2+ in 18.6% aqueous ammonia obtained from ab initio quantum mechanical charge field molecular dynamics. PURE APPL CHEM 2019. [DOI: 10.1515/pac-2018-1115] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Abstract
The solvation structure and dynamics of Cu2+ in 18.6 % aqueous ammonia have been investigated using an ab initio quantum mechanical charge field molecular dynamics (QMCF MD) simulation approach at the Hartree–Fock (HF) level of theory applying the LANL2DZ ECP and Dunning DZP basis sets for Cu2+, ammonia and water, respectively. During a simulation time of 20 ps, only NH3 molecules are observed within the first solvation shell of Cu2+, resulting in the formation of an octahedral [Cu(NH3)6]2+ complex. While no exchange of these ligands with the second solvation shell are observed along the simulation, the monitoring of the associated N-Ntrans distances highlight the dynamics of the associated Jahn-Teller distortions, showing on average 2 elongated axial (2.19 Å) and 4 equatorial Cu–N bonds (2.39 Å). The observed structural properties are found in excellent agreement with experimental studies. In addition, an NBO analysis was carried out, confirming the strong electrostatic character of the Cu2+–NH3 interaction.
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Affiliation(s)
- Wahyu Dita Saputri
- Department of Chemistry , Universitas Gadjah Mada , Yogyakarta , Indonesia
- Austrian-Indonesian Centre for Computational Chemistry , Universitas Gadjah Mada , Yogyakarta , Indonesia
| | - Karna Wijaya
- Department of Chemistry , Universitas Gadjah Mada , Yogyakarta , Indonesia
| | - Harno Dwi Pranowo
- Department of Chemistry , Universitas Gadjah Mada , Yogyakarta , Indonesia
- Austrian-Indonesian Centre for Computational Chemistry , Universitas Gadjah Mada , Yogyakarta , Indonesia
| | - Thomas S. Hofer
- University of Innsbruck , Theoretical Chemistry Division , Innsbruck , Austria
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