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Curnow OJ, Crittenden DL. Structures and Spectra of Halide Hydrate Clusters in the Solid State: A Link between the Gas Phase and Solution State. Chempluschem 2022; 87:e202100535. [DOI: 10.1002/cplu.202100535] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 02/07/2022] [Indexed: 11/10/2022]
Affiliation(s)
- Owen John Curnow
- University of Canterbury Department of Chemistry Private Bag 4800 8002 Christchurch NEW ZEALAND
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Tkachenko NV, Tkachenko AA, Kulyukin VA, Boldyrev AI. DFT Study of Microsolvated [NO 3·(H 2O) n] - ( n = 1-12) Clusters and Molecular Dynamics Simulation of Nitrate Solution. J Phys Chem A 2021; 125:8899-8906. [PMID: 34591472 DOI: 10.1021/acs.jpca.1c07206] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Investigation of the process of the NO3- anion solvation is central to understanding the chemical and physical properties of its aqueous solutions. The importance of this topic can be seen in atmospheric chemistry, as well as in nuclear waste processing research. In this work, we used a particle swarm optimization technique driven by density functional theory to sample the potential energy surface of various microsolvated [NO3·(H2O)n]- (n = 1-12) clusters. We found that the charge transfer plays a crucial role in the stabilization of the investigated species. Moreover, by conducting ab initio molecular dynamics simulations, we showed that at low concentrations (∼0.2 M) the NO3- species tend to be located on the surface of water solution. We also observed that the contact ion pair K+-NO3- undergoes a fast dissociation and each of the ions is solvated separately. As a result, from our calculations, we expect that at low concentration there could be oppositely signed concentration gradients for NO3- and K+ ions in a thin water film.
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Affiliation(s)
- Nikolay V Tkachenko
- Department of Chemistry and Biochemistry, Utah State University, 0300 Old Main Hill, Logan, Utah 84322-0300, United States
| | - Anastasiia A Tkachenko
- Department of Computer Science, Utah State University, 0300 Old Main Hill, Logan, Utah 84322-0300, United States
| | - Vladimir A Kulyukin
- Department of Computer Science, Utah State University, 0300 Old Main Hill, Logan, Utah 84322-0300, United States
| | - Alexander I Boldyrev
- Department of Chemistry and Biochemistry, Utah State University, 0300 Old Main Hill, Logan, Utah 84322-0300, United States
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Senthooran R, Curnow OJ, Crittenden DL. Discrete Oligomers and Polymers of Chloride Monohydrate Can Form in Encapsulated Environments: Structures and Infrared Spectra of [Cl 4 (H 2 O) 4 ] 4- and {[Cl(H 2 O)] - } ∞. Chempluschem 2021; 86:1297-1306. [PMID: 34491631 DOI: 10.1002/cplu.202100342] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 08/24/2021] [Indexed: 11/06/2022]
Abstract
A discrete tetrachloride tetrahydrate cluster, [Cl4 (H2 O)4 ]4- , was obtained with a partially-fluorinated triaminocyclopropenium cation, [C3 (N(CH2 CF3 )2 )(NEt2 )(NPr2 )]+ . The cluster consists of a [Cl2 (H2 O)2 ]2- square with each Cl- coordinated by another H2 O bridged to another Cl- . A 1D polymer of chloride monohydrate, {[Cl(H2 O)]- }∞ , was obtained with [C3 (N(CH2 CF3 )2 )2 (NBuMe)]+ . The tetrameric and polymeric structures were found to be computationally-unstable in the gas phase which indicates that an encapsulated environment is essential for their isolation. DFT and DFTB calculations were carried out on gas-phase [Cl4 (H2 O)4 ]4- to assist the infrared assignments. Anharmonically-corrected B3LYP transition frequencies were in close agreement with experiment, but DFTB models were only appropriate for qualitative interpretation. Solid-state DFTB calculations allowed the vibrational modes to be assigned. The results found are consistent with "discrete" chloride hydrates.
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Affiliation(s)
- Rathiga Senthooran
- School of Physical and Chemical Sciences, University of Canterbury, Private Bag, 4800, Christchurch, New Zealand
| | - Owen J Curnow
- School of Physical and Chemical Sciences, University of Canterbury, Private Bag, 4800, Christchurch, New Zealand
| | - Deborah L Crittenden
- School of Physical and Chemical Sciences, University of Canterbury, Private Bag, 4800, Christchurch, New Zealand
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Pathak AK, Samanta AK. An ab initio study on the structure, energetics and spectra of F(CO 2) n−: the observation on the strong F–CO 2 bond. NEW J CHEM 2021. [DOI: 10.1039/d1nj00796c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bulk VDE and SE values decrease from fluoride to iodide (F− > Cl− > Br− > I−) in both CO2 and H2O.
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Affiliation(s)
- Arup Kumar Pathak
- Theoretical Chemistry Section
- Chemistry Division
- Chemistry Group
- Bhabha Atomic Research Centre
- Mumbai-400085
| | - Alok Kumar Samanta
- Theoretical Chemistry Section
- Chemistry Division
- Chemistry Group
- Bhabha Atomic Research Centre
- Mumbai-400085
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Senthooran R, Curnow OJ, Brenner T, Weiss R, Ferreras M, Crittenden DL. A Series of Discrete Dichloride Dihydrates: Characterisation and Symmetry Effects. Chempluschem 2020; 85:2272-2280. [PMID: 32897648 DOI: 10.1002/cplu.202000563] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2020] [Revised: 08/16/2020] [Indexed: 11/07/2022]
Abstract
A series of three discrete dichloride dihydrates [Cl2 (H2 O)2 ]2- have been isolated with different triaminocyclopropenium (TAC) cations and with different crystallographic symmetries. The cluster exhibits D2h symmetry with the tris(dimethylamino)cyclopropenium cation [C3 (NMe2 )3 ]+ , C2h symmetry with the fluorinated cation [C3 (N(CH2 CF3 )2 )(NBu2 )2 ]+ (containing two 2,2,2-trifluoroethyl substituents) and C2v symmetry with the more fluorinated [C3 (N(CH2 CF3 )2 )2 (NBu2 )]+ cation. The effect of symmetry on the infrared spectra of the dichloride ion-pair clusters, as well as deuterated analogues, has been investigated. The D2h - and C2h -symmetric clusters each exhibit two stretching bands in the infrared at 3427 and 3368 cm-1 for D2h symmetry and 3444 and 3392 cm-1 for C2h symmetry, whereas the C2v -symmetric cluster exhibits three bands at 3475, 3426 and 3373 cm-1 . Computational studies were carried out on a [Cl2 (H2 O)2 ]2- cluster with C2v symmetry to aid the infrared band assignments.
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Affiliation(s)
- Rathiga Senthooran
- School of Physical and Chemical Sciences, University of Canterbury, Private Bag, 4800, Christchurch, New Zealand
| | - Owen J Curnow
- School of Physical and Chemical Sciences, University of Canterbury, Private Bag, 4800, Christchurch, New Zealand
| | - Thomas Brenner
- Institut für Organische Chemie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestraße 42, 91054, Erlangen, Germany
| | - Robert Weiss
- Institut für Organische Chemie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestraße 42, 91054, Erlangen, Germany
| | - Manuel Ferreras
- School of Physical and Chemical Sciences, University of Canterbury, Private Bag, 4800, Christchurch, New Zealand
| | - Deborah L Crittenden
- School of Physical and Chemical Sciences, University of Canterbury, Private Bag, 4800, Christchurch, New Zealand
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Curnow OJ, Senthooran R. One water to bind a chloride-chloride ion pair: isolation of discrete [Cl 2(H 2O)] 2- in the solid state. Dalton Trans 2020; 49:9579-9582. [PMID: 32647843 DOI: 10.1039/d0dt02300k] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A discrete dichloride ion pair in the form of a monohydrate, [Cl2(H2O)]2-, was isolated using the triaminocyclopropenium cation [C3(NHex2)(N(CH2CF3)2)2]+. Although this ion pair is calculated to be unstable in the gas phase, the ionic lattice and weak CH-Cl hydrogen bonds assist the stabilization of the cluster. The D2O and HDO isotopomers were also prepared and characterized.
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Affiliation(s)
- Owen J Curnow
- School of Physical and Chemical Sciences, University of Canterbury, Private Bag 4800, Christchurch 8140, New Zealand.
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Abdelbassit MS, Curnow OJ, Ferreras M, Crittenden DL. A Discrete Dichloride Tetrahydrate Trapped by a Cyclopropenium Cation: Structure and Spectroscopic Properties. Chempluschem 2020; 85:927-932. [PMID: 32401422 DOI: 10.1002/cplu.202000146] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 04/12/2020] [Accepted: 04/14/2020] [Indexed: 11/11/2022]
Abstract
A discrete dichloride tetrahydrate cluster, [Cl2 (H2 O)4 ]2- , was obtained as a salt of the bis(diphenylamino)diethylamino cyclopropenium cation [C3 (NPh2 )2 (NEt2 )]+ and characterized by single-crystal X-ray diffraction and infrared spectroscopy. This chloride-chloride ion-pair cluster consists of a [Cl2 (H2 O)2 ]2- square with opposite edges bridged by water molecules to give a chair-like structure of the non-hydrogen atoms. The solid-state structure is essentially the same as the calculated gas-phase structure. Infrared spectra were also collected on the deuterium analogue [Cl2 (D2 O)4 ]2- . Computational studies were carried out on gas-phase [Cl2 (H2 O)4 ]2- to confirm the infrared band assignments in the solid state. The structure and infrared spectrum are consistent with the discrete nature of the cluster.
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Affiliation(s)
- Mohammed S Abdelbassit
- School of Physical and Chemical Sciences, University of Canterbury, Private Bag, 4800, Christchurch, New Zealand
| | - Owen J Curnow
- School of Physical and Chemical Sciences, University of Canterbury, Private Bag, 4800, Christchurch, New Zealand
| | - Manuel Ferreras
- School of Physical and Chemical Sciences, University of Canterbury, Private Bag, 4800, Christchurch, New Zealand
| | - Deborah L Crittenden
- School of Physical and Chemical Sciences, University of Canterbury, Private Bag, 4800, Christchurch, New Zealand
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Kocherbitov V. Molecular dynamics simulations of liquid crystalline phases of dodecyltrimethylammonium chloride. J Mol Liq 2015. [DOI: 10.1016/j.molliq.2015.06.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Friedrich J. Efficient Calculation of Accurate Reaction Energies—Assessment of Different Models in Electronic Structure Theory. J Chem Theory Comput 2015; 11:3596-609. [DOI: 10.1021/acs.jctc.5b00087] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Joachim Friedrich
- Institute for Chemistry, Chemnitz University of Technology, Straße der Nationen
62, 09111 Chemnitz, Germany
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