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Miller SL, Gaidamauskas E, Altaf AA, Crans DC, Levinger NE. Where Are Sodium Ions in AOT Reverse Micelles? Fluoride Anion Probes Nanoconfined Ions by 19F Nuclear Magnetic Resonance Spectroscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023. [PMID: 37219990 DOI: 10.1021/acs.langmuir.3c00649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Confining water to nanosized spaces creates a unique environment that can change water's structural and dynamic properties. When ions are present in these nanoscopic spaces, the limited number of water molecules and short screening length can dramatically affect how ions are distributed compared to the homogeneous distribution assumed in bulk aqueous solution. Here, we demonstrate that the chemical shift observed in 19F NMR spectroscopy of fluoride anion, F-, probes the location of sodium ions, Na+, confined in reverse micelles prepared from AOT (sodium dioctyl sulfosuccinate) surfactants. Our measurements show that the nanoconfined environment of reverse micelles can lead to extremely high apparent ion concentrations and ionic strength, beyond the limit in bulk aqueous solutions. Most notably, the 19F NMR chemical shift trends we observe for F- in the reverse micelles indicate that the AOT sodium counterions remain at or near the interior interface between surfactant and water, thus providing the first experimental support for this hypothesis.
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Affiliation(s)
- Samantha L Miller
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Ernestas Gaidamauskas
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Ataf Ali Altaf
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
- Department of Chemistry, University of Okara, Okara 56300, Pakistan
| | - Debbie C Crans
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
- Cell and Molecular Biology Program, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Nancy E Levinger
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
- Department of Electrical and Computer Engineering, Colorado State University, Fort Collins, Colorado 80523, United States
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Alkan F, Holmes ST, Dybowski C. Role of Exact Exchange and Relativistic Approximations in Calculating 19F Magnetic Shielding in Solids Using a Cluster Ansatz. J Chem Theory Comput 2017; 13:4741-4752. [DOI: 10.1021/acs.jctc.7b00555] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Fahri Alkan
- Department
of Chemistry, Kansas State University, Manhattan, Kansas 66506, United States
| | - Sean T. Holmes
- Department
of Chemistry and Biochemistry, University of Windsor, Windsor, ON N9B 3P4, Canada
| | - Cecil Dybowski
- Department
of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
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Isley WC, Urick AK, Pomerantz WCK, Cramer CJ. Prediction of 19F NMR Chemical Shifts in Labeled Proteins: Computational Protocol and Case Study. Mol Pharm 2016; 13:2376-86. [DOI: 10.1021/acs.molpharmaceut.6b00137] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- William C. Isley
- Department of Chemistry,
Chemical Theory Center, and Supercomputing Institute, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Andrew K. Urick
- Department of Chemistry,
Chemical Theory Center, and Supercomputing Institute, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - William C. K. Pomerantz
- Department of Chemistry,
Chemical Theory Center, and Supercomputing Institute, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Christopher J. Cramer
- Department of Chemistry,
Chemical Theory Center, and Supercomputing Institute, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
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Holmes ST, Iuliucci RJ, Mueller KT, Dybowski C. Critical Analysis of Cluster Models and Exchange-Correlation Functionals for Calculating Magnetic Shielding in Molecular Solids. J Chem Theory Comput 2015; 11:5229-41. [DOI: 10.1021/acs.jctc.5b00752] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sean T. Holmes
- Department
of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Robbie J. Iuliucci
- Department
of Chemistry, Washington and Jefferson College, Washington, Pennsylvania 15301, United States
| | - Karl T. Mueller
- Department
of Chemistry, Pennsylvania State University, University Park, Pennsylvania 16802, United States
- Physical
and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Cecil Dybowski
- Department
of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
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Holmes ST, Iuliucci RJ, Mueller KT, Dybowski C. Density functional investigation of intermolecular effects on 13C NMR chemical-shielding tensors modeled with molecular clusters. J Chem Phys 2014; 141:164121. [DOI: 10.1063/1.4900158] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Affiliation(s)
- Sean T. Holmes
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, USA
| | - Robbie J. Iuliucci
- Department of Chemistry, Washington and Jefferson College, Washington, Pennsylvania 15301, USA
| | - Karl T. Mueller
- Department of Chemistry, Pennsylvania State University, University Park, Pennsylvania 16802, USA
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - Cecil Dybowski
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, USA
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Biswal M, Body M, Legein C, Sadoc A, Boucher F. NbF5 and TaF5: Assignment of 19F NMR resonances and chemical bond analysis from GIPAW calculations. J SOLID STATE CHEM 2013. [DOI: 10.1016/j.jssc.2013.09.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Sadoc A, Body M, Legein C, Biswal M, Fayon F, Rocquefelte X, Boucher F. NMR parameters in alkali, alkaline earth and rare earth fluorides from first principle calculations. Phys Chem Chem Phys 2011; 13:18539-50. [DOI: 10.1039/c1cp21253b] [Citation(s) in RCA: 100] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Begam Elavarasi S, Kavita Dorai. Characterization of the 19F chemical shielding tensor using cross-correlated spin relaxation measurements and quantum chemical calculations. Chem Phys Lett 2010. [DOI: 10.1016/j.cplett.2010.02.078] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Zhang J, Cai S, Chen Z. Theoretical investigation on multinuclear NMR chemical shifts of some tris(trifluoromethyl)boron complexes. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2009; 47:629-634. [PMID: 19384915 DOI: 10.1002/mrc.2438] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Tris(trifluoromethyl)boron complexes have unusual properties and may find applications in many fields of chemistry, biology, and physics. To gain insight into their NMR properties, the isotropic 11B, 13C, and 19F NMR chemical shifts of a series of tris(trifluoromethyl)boron complexes were systematically studied using the gauge-included atomic orbitals (GIAO) method at the levels of B3LYP/6-31 + G(d,p)//B3LYP/6-31G* and B3LYP/6-311 + G(d,p)//B3LYP/6-311 + G(d,p). Solvent effects were taken into account by polarizable continuum models (PCM). The calculated results were compared with the experimental values. The reason that the structurally inequivalent fluorine atoms in a specific species give a same chemical shift in experimental measurements is attributed to the fast rotation of CF3 group around the B-C(F3) bond because of the low energy barrier. The calculated 11B, 13C(F3), and 19F chemical shifts are in good agreement with the experimental measurements, while the deviations of calculated 13C(X, X = O, N) chemical shifts are slightly large. For the latter, the average absolute deviations of the results from B3LYP/6-311 + G(d,p)//B3LYP/6-311 + G(d,p) are smaller than those from B3LYP/6-31 + G(d,p)//B3LYP/6-31G*, and the inclusion of PCM reduces the deviation values. The calculated 19F and 11B chemical shieldings of (CF3)3BCO are greatly dependent on the optimized structures, while the influence of structural parameters on the calculated 13C chemical shieldings is minor.
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Affiliation(s)
- Jun Zhang
- Department of Physics, Xiamen University, Fujian, People's Republic of China
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Ahrens M, Scholz G, Kemnitz E. An empirical model to calculate 19F isotropic chemical shifts in alkali-hexafluoroaluminates. J Fluor Chem 2009. [DOI: 10.1016/j.jfluchem.2009.01.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Khanmohammadi H, Keypour H, Salehei Fard M, Abnosi MH. Synthesis and biological activity of Magnesium(II) complexes of heptaaza Schiff base macrocyclic ligands; 1H and 13C chemical shifts computed by the GIAO-DFT and CSGT-DFT methodologies. J INCL PHENOM MACRO 2008. [DOI: 10.1007/s10847-008-9495-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Harding ME, Lenhart M, Auer AA, Gauss J. Quantitative prediction of gas-phase F19 nuclear magnetic shielding constants. J Chem Phys 2008; 128:244111. [DOI: 10.1063/1.2943145] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Rollet AL, Godier S, Bessada C. High temperature NMR study of the local structure of molten LaF3–AF (A = Li, Na, K and Rb) mixtures. Phys Chem Chem Phys 2008; 10:3222-8. [DOI: 10.1039/b719158h] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Matta CF, Castillo N, Boyd RJ. Atomic contributions to bond dissociation energies in aliphatic hydrocarbons. J Chem Phys 2007; 125:204103. [PMID: 17144686 DOI: 10.1063/1.2378720] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
This paper explores the atomic contributions to the electronic vibrationless bond dissociation enthalpy (BDE) at 0 K of the central C-C bond in straight-chain alkanes (C(n)H(2n+2)) and trans-alkenes (C(n)H(2n)) with an even number of carbon atoms, where n=2, 4, 6, 8. This is achieved using the partitioning of the total molecular energy according to the quantum theory of atoms in molecules by comparing the atomic energies in the intact molecule and its dissociation products. The study is conducted at the MP2(full)6-311++G(d,p) level of theory. It is found that the bulk of the electronic energy necessary to sever a single C-C bond is not supplied by these two carbon atoms (the alpha-carbons) but instead by the atoms directly bonded to them. Thus, the burden of the electronic part of the BDE is primarily carried by the two hydrogens attached to each of the alpha-carbons and by the beta-carbons. The effect drops off rapidly with distance along the hydrocarbon chain. The situation is more complex in the case of the double bond in alkenes, since here the burden is shared between the alpha-carbons as well as the atoms directly bonded to them, namely, again the alpha-hydrogens and the beta-carbons. These observations may lead to a better understanding of the bond dissociation process and should be taken into account when locally dense basis sets are introduced to improve the accuracy of BDE calculations.
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Affiliation(s)
- Chérif F Matta
- Mount Saint Vincent University, Halifax, Nova Scotia B3M 2J6, Canada and Department of Chemistry, Dalhousie University, Halifax, Nova Scotia B3H 4J3, Canada.
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Silly G, Body M, Buzaré JY, Legein C, Bureau B. Les fluorures inorganiques, des matériaux modèles pour tester les méthodes de calcul de paramètres RMN (déplacement chimique et paramètres quadripolaires). CR CHIM 2004. [DOI: 10.1016/j.crci.2004.02.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Fukaya H, Ono T. DFT-GIAO calculations of19F NMR chemical shifts for perfluoro compounds. J Comput Chem 2004; 25:51-60. [PMID: 14634993 DOI: 10.1002/jcc.10339] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The (19)F NMR shieldings for 53 kinds of perfluoro compounds were calculated by the B3LYP-GIAO method using the 6-31G(d), 6-31+G(d), 6-31G(d,p), 6-31++G(d,p), 6-311G(d,p), 6-311++G(d,p), 6-311G(2d,2p), 6-311++G(2d,2p), 6-311++G(2df,2p), 6-311++G(3d,2p), and 6-311++G(3df,2p) basis sets. The diffuse functions markedly reduce the difference between the calculated and experimental chemical shifts. The calculations using the 6-31++G(d,p) basis set give the chemical shifts within 10 ppm deviations from experimental values except for the fluorine nuclei attached to an oxygen atom, a four- and a six-coordinated sulfur atom, and FC(CF(3))(2) attached to a sulfur atom.
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Affiliation(s)
- Haruhiko Fukaya
- Institute for Structural and Engineering Materials, National Institute of Advanced Industrial Science and Technology (AIST), Shimoshidami, Moriyama-ku, Nagoya 463-8560, Japan.
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Platas-Iglesias C, Esteban D, Ojea V, Avecilla F, de Blas A, Rodríguez-Blas T. Templating Schiff-base lateral macrobicycles: an experimental and theoretical structural study of the intermediates. Inorg Chem 2003; 42:4299-307. [PMID: 12844302 DOI: 10.1021/ic034266t] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this paper, we report a structural study both in the solid state and in solution of barium complexes with the diamine N,N'-bis(2-aminobenzyl)-4,13-diaza-18-crown-6 (L(2)), that allows us to rationalize the template effect of the metal ion in the synthesis of Schiff-base lateral macrobicycles resulting from the condensation of L(2) with different dicarbonyl compounds. The X-ray crystal structures of [Ba(L(2))(ClO(4))](ClO(4)) (3) [triclinic space group P1 with Z = 2, a = 10.467(2) A, b = 10.4755(2) A, c = 16.9911(3) A, alpha = 85.075(1) degrees, beta = 80.907(1) degrees, and gamma = 61.627(4) degrees ] and [Ba(L(2))(NCS)(H(2)O)](SCN) (4) [monoclinic space group P2(1)/n with Z = 4, a = 9.954(5) A, b = 29.193(5) A, c = 11.313(5) A, and beta = 91.371(5) degrees ] demonstrate that in the solid state the barium(II) ion induces an anti conformation of the receptor in the complexes. Variable temperature (1)H and (13)C NMR data point out that in solution compounds 3 and 4 exist as a mixture of syn and anti isomers. The presence of the syn isomer in solution, independent of the counterion employed (perchlorate or thiocyanate), accounts for the effectiveness of the barium(II) ion as a template agent in the synthesis of the lateral macrobicycles resulting from the condensation of L(2) with different dicarbonyl compounds. Density functional theory calculations (at the B3LYP/LanL2DZ level) for [Ba(L(2))](2+) predict the syn conformation to be more stable both in vacuo and in solution (PCM model). In order to asses which of the two isomers predominates in acetonitrile solution, the (13)C NMR shielding tensors of the two isomers of [Ba(L(2))](2+) were calculated for the in vacuo optimized structures by using the GIAO method, and the results were compared with the experimental ones. According to these analyses, a syn stereochemistry is assigned to the major species in solution.
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Affiliation(s)
- Carlos Platas-Iglesias
- Departamento de Química Fundamental, Universidade da Coruña, Campus da Zapateira s/n 15071 A Coruña, Spain
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Cai SH, Chen Z, Chen ZW, Wan HL. 19F NMR chemical shielding for metal fluorides MF2 (M=Zn, Cd, Pb), MF3 (M=Al, Ga, In) and SnF4. Chem Phys Lett 2002. [DOI: 10.1016/s0009-2614(02)01028-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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