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Liu X, Liu Y, Wang Z. Propagation characteristics of photonic crystal fibers selectively filled with ionic liquid. NANOTECHNOLOGY AND PRECISION ENGINEERING 2021. [DOI: 10.1063/10.0002950] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Xiaoqi Liu
- Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Institute of Modern Optics, Nankai University, Tianjin 300350, China
| | - Yange Liu
- Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Institute of Modern Optics, Nankai University, Tianjin 300350, China
| | - Zhi Wang
- Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Institute of Modern Optics, Nankai University, Tianjin 300350, China
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Lucier BEG, Terskikh VV, Guo J, Bourque JL, McOnie SL, Ripmeester JA, Huang Y, Baines KM. Chlorine-35 Solid-State Nuclear Magnetic Resonance Spectroscopy as an Indirect Probe of the Oxidation Number of Tin in Tin Chlorides. Inorg Chem 2020; 59:13651-13670. [PMID: 32883071 DOI: 10.1021/acs.inorgchem.0c02025] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Ultrawideline 35Cl solid-state nuclear magnetic resonance (SSNMR) spectra of a series of 12 tin chlorides were recorded. The magnitude of the 35Cl quadrupolar coupling constant (CQ) was shown to consistently indicate the chemical state (oxidation number) of the bound Sn center. The chemical state of the Sn center was independently verified by tin Mössbauer spectroscopy. CQ(35Cl) values of >30 MHz correspond to Sn(IV), while CQ(35Cl) readings of <30 MHz indicate that Sn(II) is present. Tin-119 SSNMR experiments would seem to be the most direct and effective route to interrogating tin in these systems, yet we show that ambiguous results can emerge from this method, which may lead to an incorrect interpretation of the Sn oxidation number. The accumulated 35Cl NMR data are used as a guide to assign the Sn oxidation number in the mixed-valent metal complex Ph3PPdImSnCl2. The synthesis and crystal structure of the related Ph3PPtImSnCl2 are reported, and 195Pt and 35Cl SSNMR experiments were also used to investigate its Pt-Sn bonding. Plane-wave DFT calculations of 35Cl, 119Sn, and 195Pt NMR parameters are used to model and interpret experimental data, supported by computed 119Sn and 195Pt chemical shift tensor orientations. Given the ubiquity of directly bound Cl centers in organometallic and inorganic systems, there is tremendous potential for widespread usage of 35Cl SSNMR parameters to provide a reliable indication of the chemical state in metal chlorides.
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Affiliation(s)
- Bryan E G Lucier
- Department of Chemistry, The University of Western Ontario, London, Ontario N6A 5B7, Canada
| | - Victor V Terskikh
- Department of Chemistry, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Jiacheng Guo
- Department of Chemistry, The University of Western Ontario, London, Ontario N6A 5B7, Canada
| | - Jeremy L Bourque
- Department of Chemistry, The University of Western Ontario, London, Ontario N6A 5B7, Canada
| | - Sarah L McOnie
- Department of Chemistry, The University of Western Ontario, London, Ontario N6A 5B7, Canada
| | - John A Ripmeester
- National Research Council Canada, 100 Sussex Drive, Ottawa, Ontario K1A 0R6, Canada
| | - Yining Huang
- Department of Chemistry, The University of Western Ontario, London, Ontario N6A 5B7, Canada.,Centre for Advanced Materials and Biomaterials Research (CAMBR), The University of Western Ontario, London, Ontario N6A 5B7, Canada
| | - Kim M Baines
- Department of Chemistry, The University of Western Ontario, London, Ontario N6A 5B7, Canada.,Centre for Advanced Materials and Biomaterials Research (CAMBR), The University of Western Ontario, London, Ontario N6A 5B7, Canada
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Endo T, Imanari M, Hidaka Y, Seki H, Nishikawa K, Sen S. Structure and dynamics of room temperature ionic liquids with bromide anion: results from 81Br NMR spectroscopy. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2015; 53:369-378. [PMID: 25783567 DOI: 10.1002/mrc.4208] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2014] [Revised: 12/11/2014] [Accepted: 12/15/2014] [Indexed: 06/04/2023]
Abstract
We report the results of a comprehensive (81)Br NMR spectroscopic study of the structure and dynamics of two room temperature ionic liquids (RTILs), 1-butyl-3-methylimidazolium bromide ([C(4)mim]Br) and 1-butyl-2,3-dimethylimidazolium bromide ([C(4)C(1)mim]Br), in both liquid and crystalline states. NMR parameters in the gas phase are also simulated for stable ion pairs using quantum chemical calculations. The combination of (81)Br spin-lattice and spin-spin relaxation measurements in the motionally narrowed region of the stable liquid state provides information on the correlation time of the translational motion of the cation. (81) Br quadrupolar coupling constants (C(Q)) of the two RTILs were estimated to be 6.22 and 6.52 MHz in the crystalline state which were reduced by nearly 50% in the liquid state, although in the gas phase, the values are higher and span the range of 7-53 MHz depending on ion pair structure. The C(Q) can be correlated with the distance between the cation-anion pairs in all the three states. The (81)Br C(Q) values of the bromide anion in the liquid state indicate the presence of some structural order in these RTILs, the degree of which decreases with increasing temperature. On the other hand, the ionicity of these RTILs is estimated from the combined knowledge of the isotropic chemical shift and the appropriate mean energy of the excited state. [C(4)C(1)mim]Br has higher ionicity than [C(4)mim]Br in the gas phase, while the situation is reverse for the liquid and the crystalline states.
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Affiliation(s)
- Takatsugu Endo
- Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa-shi, Ishikawa, 920-1192, Japan
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Klimavicius V, Gdaniec Z, Balevicius V. Very short NMR relaxation times of anions in ionic liquids: new pulse sequence to eliminate the acoustic ringing. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 132:879-883. [PMID: 24938418 DOI: 10.1016/j.saa.2014.04.140] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2013] [Revised: 03/10/2014] [Accepted: 04/23/2014] [Indexed: 06/03/2023]
Abstract
NMR relaxation processes of anions were studied in two neat imidazolium-based room temperature ionic liquids (RTILs) 1-decyl-3-methyl-imidazolium bromide- and chloride. The spin-lattice and spin-spin relaxations of 81Br and 35Cl nuclei were found to be extremely fast due to very strong quadrupolar interactions. The determined relaxation rates are comparable with those observed in the solids or in some critical organic solute/water/salt systems. In order to eliminate the acoustic ringing of the probe-head during relaxation times measurements the novel pulse sequence has been devised. It is based on the conventional inversion recovery pulse sequence, however, instead of the last 90° pulse the subsequence of three 90° pulses applied along axes to fulfill the phase cycling condition is used. Using this pulse sequence it was possible to measure T1 for both studied nuclei. The viscosity measurements have been carried out and the rotational correlation times were calculated. The effective 35Cl quadrupolar coupling constant was found to be almost one order lower than that for 81Br, i.e. 1.8 MHz and 16.0 MHz, respectively. Taking into account the facts that the ratio of (Q(35Cl)/Q(81Br))2≈0.1 and EFG tensors on the anions are quite similar, analogous structural organizations are expected for both RTILs. The observed T1/T2 (1.27-1.44) ratios were found to be not sufficiently high to confirm the presence of long-living (on the time scale of ≥10(-8) s) mesoscopic structures or heterogeneities in the studied neat ionic liquids.
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Affiliation(s)
- Vytautas Klimavicius
- Department of General Physics and Spectroscopy, Vilnius University, Sauletekio 9-3, LT-10222 Vilnius, Lithuania.
| | - Zofia Gdaniec
- Institute of Bioorganic Chemistry, Polish Academy of Sciences, Z. Noskowskiego 12/14, PL-61704 Poznan, Poland.
| | - Vytautas Balevicius
- Department of General Physics and Spectroscopy, Vilnius University, Sauletekio 9-3, LT-10222 Vilnius, Lithuania.
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Lucier BEG, Johnston KE, Xu W, Hanson JC, Senanayake SD, Yao S, Bourassa MW, Srebro M, Autschbach J, Schurko RW. Unravelling the Structure of Magnus’ Pink Salt. J Am Chem Soc 2014; 136:1333-51. [DOI: 10.1021/ja4076277] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Bryan E. G. Lucier
- Department
of Chemistry and Biochemistry, University of Windsor, Windsor, Ontario, Canada N9B 3P4
| | - Karen E. Johnston
- Department
of Chemistry and Biochemistry, University of Windsor, Windsor, Ontario, Canada N9B 3P4
| | - Wenqian Xu
- Department
of Chemistry, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Jonathan C. Hanson
- Department
of Chemistry, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Sanjaya D. Senanayake
- Department
of Chemistry, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Siyu Yao
- Center for Computational Science & Engineering, and PKU Green Chemistry Centre, Peking University, Beijing 100871, China
| | - Megan W. Bourassa
- Department
of Chemistry, Stony Brook University, Stony Brook, New York 11794, United States
| | - Monika Srebro
- Department
of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260-3000, United States
- Department
of Theoretical Chemistry, Faculty of Chemistry, Jagiellonian University, 30-060 Krakow, Poland
| | - Jochen Autschbach
- Department
of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260-3000, United States
| | - Robert W. Schurko
- Department
of Chemistry and Biochemistry, University of Windsor, Windsor, Ontario, Canada N9B 3P4
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Burgess KMN, Korobkov I, Bryce DL. A Combined Solid-State NMR and X-ray Crystallography Study of the Bromide Ion Environments in Triphenylphosphonium Bromides. Chemistry 2012; 18:5748-58. [DOI: 10.1002/chem.201103478] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2011] [Indexed: 12/13/2022]
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Perras FA, Bryce DL. Direct Investigation of Covalently Bound Chlorine in Organic Compounds by Solid-State35Cl NMR Spectroscopy and Exact Spectral Line-Shape Simulations. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201200728] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Perras FA, Bryce DL. Direct investigation of covalently bound chlorine in organic compounds by solid-state 35Cl NMR spectroscopy and exact spectral line-shape simulations. Angew Chem Int Ed Engl 2012; 51:4227-30. [PMID: 22419499 PMCID: PMC3430411 DOI: 10.1002/anie.201200728] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2012] [Indexed: 11/11/2022]
Affiliation(s)
- Frédéric A Perras
- Department of Chemistry and CCRI, University of Ottawa, 10 Marie Curie Private, Ottawa, Ontario, Canada
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Widdifield CM, Bryce DL. A multinuclear solid-state magnetic resonance and GIPAW DFT study of anhydrous calcium chloride and its hydrates. CAN J CHEM 2011. [DOI: 10.1139/v11-009] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The group 2 metal halides and corresponding metal halide hydrates serve as useful model systems for understanding the relationship between the electric field gradient (EFG) and chemical shift (CS) tensors at the halogen nuclei and the local molecular and electronic structure. Here, we present a 35/37Cl and 43Ca solid-state nuclear magnetic resonance (SSNMR) study of CaCl2. The 35Cl nuclear quadrupole coupling constant, 8.82(8) MHz, and the isotropic chlorine CS, 105(8) ppm (with respect to dilute NaCl(aq)), are different from the values reported previously for this compound, as well as those reported for CaCl2·2H2O. Chlorine-35 SSNMR spectra are also presented for CaCl2·6H2O, and when taken in concert, the SSNMR observations for CaCl2, CaCl2·2H2O, and CaCl2·6H2O clearly demonstrate the sensitivity of the chlorine EFG and CS tensors to the local symmetry and to changes in the hydration state. For example, the value of δiso decreases with increasing hydration. Gauge-including projector-augmented wave (GIPAW) density functional theory (DFT) calculations are used to substantiate the experimental SSNMR findings, to rule out the presence of other hydrates in our samples, to refine the hydrogen positions in CaCl2·2H2O, and to explore the isostructural relationship between CaCl2 and CaBr2. Finally, the 43Ca CS tensor span is measured to be 31(5) ppm for anhydrous CaCl2, which represents only the fifth CS tensor span measurement for calcium.
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Affiliation(s)
- Cory M. Widdifield
- Department of Chemistry and Centre for Catalysis Research and Innovation, University of Ottawa, 10 Marie Curie Private, Ottawa, ON K1N 6N5, Canada
| | - David L. Bryce
- Department of Chemistry and Centre for Catalysis Research and Innovation, University of Ottawa, 10 Marie Curie Private, Ottawa, ON K1N 6N5, Canada
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Widdifield CM, Bryce DL. Solid-State 127I NMR and GIPAW DFT Study of Metal Iodides and Their Hydrates: Structure, Symmetry, and Higher-Order Quadrupole-Induced Effects. J Phys Chem A 2010; 114:10810-23. [DOI: 10.1021/jp108237x] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Cory M. Widdifield
- Department of Chemistry and Centre for Catalysis Research and Innovation, University of Ottawa, 10 Marie Curie Pvt., Ottawa, Ontario, Canada
| | - David L. Bryce
- Department of Chemistry and Centre for Catalysis Research and Innovation, University of Ottawa, 10 Marie Curie Pvt., Ottawa, Ontario, Canada
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Affiliation(s)
- Shi Bai
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, USA
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Widdifield CM, Bryce DL. Solid-State 79/81Br NMR and Gauge-Including Projector-Augmented Wave Study of Structure, Symmetry, and Hydration State in Alkaline Earth Metal Bromides. J Phys Chem A 2010; 114:2102-16. [DOI: 10.1021/jp909106j] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Cory M. Widdifield
- Department of Chemistry and Centre for Catalysis Research and Innovation, University of Ottawa, 10 Marie Curie Pvt., Ottawa, Ontario, Canada
| | - David L. Bryce
- Department of Chemistry and Centre for Catalysis Research and Innovation, University of Ottawa, 10 Marie Curie Pvt., Ottawa, Ontario, Canada
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Gordon PG, Brouwer DH, Ripmeester JA. Probing the Local Structure of Pure Ionic Liquid Salts with Solid- and Liquid-State NMR. Chemphyschem 2010; 11:260-8. [DOI: 10.1002/cphc.200900624] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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