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Kruk D, Masiewicz E, Budny J, Kolodziejski K, Zulewska J, Wieczorek Z. Relationship between macroscopic properties of honey and molecular dynamics – temperature effects. J FOOD ENG 2022. [DOI: 10.1016/j.jfoodeng.2021.110782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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2
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Kruk D, Florek – Wojciechowska M, Masiewicz E, Oztop M, Ploch-Jankowska A, Duda P, Wilczynski S. Water mobility in cheese by means of Nuclear Magnetic Resonance relaxometry. J FOOD ENG 2021. [DOI: 10.1016/j.jfoodeng.2021.110483] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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3
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Szklarz P, Śmiałkowski M, Bator G, Jakubas R, Cichos J, Karbowiak M, Medycki W, Baran J. Phase transitions and properties of 0D hybrid iodoantimonate(III) and iodobismuthate(III) semiconducting ferroics: [C(NH2)3]3Bi2I9 and [C(NH2)3]3Sb2I9. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129387] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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4
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Overbeck V, Appelhagen A, Rößler R, Niemann T, Ludwig R. Rotational correlation times, diffusion coefficients and quadrupolar peaks of the protic ionic liquid ethylammonium nitrate by means of 1H fast field cycling NMR relaxometry. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.114983] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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5
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Kruk D, Rochowski P, Florek-Wojciechowska M, Sebastião PJ, Lurie DJ, Broche LM. 1H spin-lattice NMR relaxation in the presence of residual dipolar interactions - Dipolar relaxation enhancement. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2020; 318:106783. [PMID: 32755749 DOI: 10.1016/j.jmr.2020.106783] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2020] [Revised: 06/29/2020] [Accepted: 07/05/2020] [Indexed: 06/11/2023]
Abstract
A model of spin-lattice relaxation for spin-1/2 nuclei in the presence of a residual dipole-dipole coupling has been presented. For slow dynamics the model predicts a bi-exponential relaxation at low frequencies, when the residual dipole-dipole interaction dominates the Zeeman coupling. Moreover, according to the model a frequency-specific relaxation enhancement, referred to as Dipolar Relaxation Enhancement (DRE) in analogy to the Quadrupole Relaxation Enhancement (QRE) is expected. The frequency position of the relaxation maximum is determined by the amplitude of the residual dipole-dipole interaction. Experimental examples of relaxation properties that might be attributed to the DRE are presented. The DRE effect has the potential to be exploited, in analogy to QRE, as a unique source of information about molecular dynamics and structure.
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Affiliation(s)
- Danuta Kruk
- Faculty of Mathematics and Computer Science, University of Warmia & Mazury in Olsztyn, Słoneczna 54, 10-710 Olsztyn, Poland.
| | - Pawel Rochowski
- Faculty of Mathematics and Computer Science, University of Warmia & Mazury in Olsztyn, Słoneczna 54, 10-710 Olsztyn, Poland
| | | | - Pedro José Sebastião
- Department of Physics, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal
| | - David J Lurie
- Bio-Medical Physics, School of Medicine, Medical Sciences & Nutrition, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, Scotland, United Kingdom
| | - Lionel M Broche
- Bio-Medical Physics, School of Medicine, Medical Sciences & Nutrition, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, Scotland, United Kingdom
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6
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Pizzanelli S, Monti S, Gordeeva LG, Solovyeva MV, Freni A, Forte C. A close view of the organic linker in a MOF: structural insights from a combined 1H NMR relaxometry and computational investigation. Phys Chem Chem Phys 2020; 22:15222-15230. [PMID: 32601632 DOI: 10.1039/d0cp01863e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The organic linker in a metal organic framework (MOF) affects its adsorption behavior and performance, and its structure and dynamics play a role in the modulation of the adsorption properties. In this work, the combination of 1H nuclear magnetic resonance (NMR) longitudinal relaxometry and theoretical calculations allowed details of the structure and dynamics of the organic linker in the NH2-MIL-125 MOF to be obtained. In particular, fast field cycling (FFC) NMR, applied here for the first time on MOFs, was used to disclose the dynamics of the amino group and its electronic environment through the analysis of the 14N quadrupole relaxation peaks, observed in the frequency interval 0.5-5 MHz, at different temperatures from 25 to 110 °C. The line width of the peaks allowed a lower boundary on the rotational correlation time of the N-H bonds to be set, whereas relevant changes in the amplitudes were interpreted in terms of a change in the orientation of the 14N averaged electric field gradient tensor. The experimental findings were complemented by quantum chemistry calculations and classical molecular dynamics simulations.
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Affiliation(s)
- Silvia Pizzanelli
- CNR-ICCOM, Institute of the Chemistry of Organometallic Compounds, via G. Moruzzi 1, 56124 Pisa, Italy.
| | - Susanna Monti
- CNR-ICCOM, Institute of the Chemistry of Organometallic Compounds, via G. Moruzzi 1, 56124 Pisa, Italy.
| | - Larisa G Gordeeva
- Boreskov Institute of Catalysis, Ac. Lavrentiev av. 5, Novosibirsk 630090, Russia and Novosibirsk State University, Pirogova str. 1, Novosibirsk 630090, Russia
| | - Marina V Solovyeva
- Boreskov Institute of Catalysis, Ac. Lavrentiev av. 5, Novosibirsk 630090, Russia and Novosibirsk State University, Pirogova str. 1, Novosibirsk 630090, Russia
| | - Angelo Freni
- CNR-ICCOM, Institute of the Chemistry of Organometallic Compounds, via G. Moruzzi 1, 56124 Pisa, Italy.
| | - Claudia Forte
- CNR-ICCOM, Institute of the Chemistry of Organometallic Compounds, via G. Moruzzi 1, 56124 Pisa, Italy.
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7
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Kruk D, Masiewicz E, Wojciechowski M, Florek-Wojciechowska M, Broche LM, Lurie DJ. Slow dynamics of solid proteins - Nuclear magnetic resonance relaxometry versus dielectric spectroscopy. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2020; 314:106721. [PMID: 32276108 DOI: 10.1016/j.jmr.2020.106721] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 03/17/2020] [Accepted: 03/18/2020] [Indexed: 06/11/2023]
Abstract
1H Nuclear Magnetic Resonance (NMR) relaxometry and Dielectric Spectroscopy (DS) have been exploited to investigate the dynamics of solid proteins. The experiments have been carried out in the frequency range of about 10 kHz-40 MHz for NMR relaxometry and 10-2Hz-20 MHz for DS. The data sets have been analyzed in terms of theoretical models allowing for a comparison of the correlation times revealed by NMR relaxometry and DS. The 1H spin-lattice relaxation profiles have been decomposed into relaxation contributions associated with 1H-1H and 1H-14N dipole - dipole interactions. The 1H-1H relaxation contribution has been interpreted in terms of three dynamical processes of time scales of 10-6s, 10-7s and 10-8s. It has turned out that the correlation times do not differ much among proteins and they are only weakly dependent on temperature. The analysis of DS relaxation spectra has also revealed three motional processes characterized by correlation times that considerably depend on temperature in contrast to those obtained from the 1H relaxation. This finding suggest that for solid proteins there is a contribution to the 1H spin-lattice relaxation associated with a kind of motion that is not probed in DS as it does not lead to a reorientation of the electric dipole moment.
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Affiliation(s)
- Danuta Kruk
- Faculty of Mathematics and Computer Science, University of Warmia & Mazury in Olsztyn, Słoneczna 54, 10-710 Olsztyn, Poland.
| | - Elzbieta Masiewicz
- Faculty of Mathematics and Computer Science, University of Warmia & Mazury in Olsztyn, Słoneczna 54, 10-710 Olsztyn, Poland
| | - Milosz Wojciechowski
- Faculty of Mathematics and Computer Science, University of Warmia & Mazury in Olsztyn, Słoneczna 54, 10-710 Olsztyn, Poland
| | | | - Lionel M Broche
- Bio-Medical Physics, School of Medicine, Medical Sciences & Nutrition, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, Scotland, United Kingdom
| | - David J Lurie
- Bio-Medical Physics, School of Medicine, Medical Sciences & Nutrition, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, Scotland, United Kingdom
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8
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Kruk D, Masiewicz E, Borkowska AM, Rochowski P, Fries PH, Broche LM, Lurie DJ. Dynamics of Solid Proteins by Means of Nuclear Magnetic Resonance Relaxometry. Biomolecules 2019; 9:E652. [PMID: 31731514 PMCID: PMC6920843 DOI: 10.3390/biom9110652] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 10/16/2019] [Accepted: 10/19/2019] [Indexed: 01/21/2023] Open
Abstract
1H Nuclear magnetic resonance (NMR) relaxometry was exploited to investigate the dynamics of solid proteins. The relaxation experiments were performed at 37 °C over a broad frequency range, from approximately 10 kHz to 40 MHz. Two relaxation contributions to the overall 1H spin-lattice relaxation were revealed; they were associated with 1H-1H and 1H-14N magnetic dipole-dipole interactions, respectively. The 1H-1H relaxation contribution was interpreted in terms of three dynamical processes occurring on timescales of 10-6 s, 10-7 s, and 10-8 s, respectively. The 1H-14N relaxation contribution shows quadrupole relaxation enhancement effects. A thorough analysis of the data was performed revealing similarities in the protein dynamics, despite their different structures. Among several parameters characterizing the protein dynamics and structure (e.g., electric field gradient tensor at the position of 14N nuclei), the orientation of the 1H-14N dipole-dipole axis, with respect to the principal axis system of the electric field gradient, was determined, showing that, for lysozyme, it was considerably different than for the other proteins. Moreover, the validity range of a closed form expression describing the 1H-14N relaxation contribution was determined by a comparison with a general approach based on the stochastic Liouville equation.
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Affiliation(s)
- Danuta Kruk
- Faculty of Mathematics and Computer Science, University of Warmia and Mazury in Olsztyn, Słoneczna 54, 10-710 Olsztyn, Poland; (E.M.); (A.M.B.); (P.R.)
| | - Elzbieta Masiewicz
- Faculty of Mathematics and Computer Science, University of Warmia and Mazury in Olsztyn, Słoneczna 54, 10-710 Olsztyn, Poland; (E.M.); (A.M.B.); (P.R.)
| | - Anna M. Borkowska
- Faculty of Mathematics and Computer Science, University of Warmia and Mazury in Olsztyn, Słoneczna 54, 10-710 Olsztyn, Poland; (E.M.); (A.M.B.); (P.R.)
| | - Pawel Rochowski
- Faculty of Mathematics and Computer Science, University of Warmia and Mazury in Olsztyn, Słoneczna 54, 10-710 Olsztyn, Poland; (E.M.); (A.M.B.); (P.R.)
| | - Pascal H. Fries
- Laboratoire de Reconnaissance Ionique et Chimie de Coordination, Service de Chimie Inorganique et Biologique (UMR E-3 CEA/UJF), CEA-Grenoble, INAC, 17 rue des Martyrs, CEDEX 09, 38054 Grenoble, France;
| | - Lionel M. Broche
- Bio-Medical Physics, School of Medicine, Medical Sciences & Nutrition, University of Aberdeen, Foresterhill, Aberdeen, Scotland AB25 2ZD, UK; (L.M.B.); (D.J.L.)
| | - David J. Lurie
- Bio-Medical Physics, School of Medicine, Medical Sciences & Nutrition, University of Aberdeen, Foresterhill, Aberdeen, Scotland AB25 2ZD, UK; (L.M.B.); (D.J.L.)
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9
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Kruk D, Masiewicz E, Umut E, Petrovic A, Kargl R, Scharfetter H. Estimation of the magnitude of quadrupole relaxation enhancement in the context of magnetic resonance imaging contrast. J Chem Phys 2019; 150:184306. [DOI: 10.1063/1.5082177] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Affiliation(s)
- Danuta Kruk
- Faculty of Mathematics and Computer Science, University of Warmia and Mazury in Olsztyn, Słoneczna 54, 10-710 Olsztyn, Poland
| | - Elzbieta Masiewicz
- Faculty of Mathematics and Computer Science, University of Warmia and Mazury in Olsztyn, Słoneczna 54, 10-710 Olsztyn, Poland
| | - Evrim Umut
- Faculty of Mathematics and Computer Science, University of Warmia and Mazury in Olsztyn, Słoneczna 54, 10-710 Olsztyn, Poland
| | - Andreas Petrovic
- Institute for Chemistry and Technology of Materials, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
| | - Rupert Kargl
- Institute for Chemistry and Technology of Materials, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
- Laboratory for Characterization and Processing of Polymers (LCPP), Faculty of Mechanical Engineering, University of Maribor, Smetanova Ulica 17, 2000 Maribor, Slovenia
| | - Hermann Scharfetter
- Institute of Medical Engineering, Graz University of Technology, Stremayrgasse 16 / III, A-8010 Graz, Austria
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Kruk D, Umut E, Masiewicz E, Fischer R, Scharfetter H. Multi-quantum quadrupole relaxation enhancement effects in 209Bi compounds. J Chem Phys 2019; 150:184309. [PMID: 31091937 DOI: 10.1063/1.5082007] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
1H spin-lattice nuclear magnetic resonance relaxation experiments have been performed for triphenylbismuth dichloride (C18H15BiCl2) and phenylbismuth dichloride (C6H5BiCl2) in powder. The frequency range of 20-128 MHz has been covered. Due to 1H-209Bi dipole-dipole interactions, a rich set of pronounced Quadrupole Relaxation Enhancement (QRE) peaks (quadrupole peaks) has been observed. The QRE patterns for both compounds have been explained in terms of single- and double-quantum transitions of the participating nuclei. The analysis has revealed a complex, quantum-mechanical mechanism of the QRE effects. The mechanism goes far beyond the simple explanation of the existence of three quadrupole peaks for 14N reported in literature. The analysis has been supported by nuclear quadrupole resonance results that independently provided the 209Bi quadrupole parameters (amplitude of the quadrupole coupling constant and asymmetry parameter).
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Affiliation(s)
- D Kruk
- Faculty of Mathematics and Computer Science, University of Warmia and Mazury in Olsztyn, Słoneczna 54, PL-10710 Olsztyn, Poland
| | - E Umut
- Faculty of Mathematics and Computer Science, University of Warmia and Mazury in Olsztyn, Słoneczna 54, PL-10710 Olsztyn, Poland
| | - E Masiewicz
- Faculty of Mathematics and Computer Science, University of Warmia and Mazury in Olsztyn, Słoneczna 54, PL-10710 Olsztyn, Poland
| | - R Fischer
- Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9/V, A-8010 Graz, Austria
| | - H Scharfetter
- Institute of Medical Engineering, Graz University of Technology, Stremayrgasse 16/III, A-8010 Graz, Austria
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11
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Scharfetter H, Gösweiner C, Krassnig PJ, Sampl C, Thonhofer M, Fischer R, Spirk S, Kargl R, Stana-Kleinschek K, Umut E, Kruk D. Aspects of structural order in 209Bi-containing particles for potential MRI contrast agents based on quadrupole enhanced relaxation. Mol Phys 2019. [DOI: 10.1080/00268976.2018.1511869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Hermann Scharfetter
- Institute of Medical Engineering, Graz University of Technology, Graz, Austria
| | - Christian Gösweiner
- Institute of Medical Engineering, Graz University of Technology, Graz, Austria
| | - Paul Josef Krassnig
- Institute of Medical Engineering, Graz University of Technology, Graz, Austria
| | - Carina Sampl
- Institute of Paper, Pulp and Fiber Technology and Institute for Chemistry and Technology of Materials, Graz University of Technology, Graz, Austria
| | - Martin Thonhofer
- Laboratory for Characterization and Processing of Polymers (LCPP), Faculty of Mechanical Engineering, University of Maribor, Maribor, Slovenia
| | - Roland Fischer
- Institute of Inorganic Chemistry Graz University of Technology, Graz, Austria
| | - Stefan Spirk
- Institute of Paper, Pulp and Fiber Technology and Institute for Chemistry and Technology of Materials, Graz University of Technology, Graz, Austria
| | - Rupert Kargl
- Laboratory for Characterization and Processing of Polymers (LCPP), Faculty of Mechanical Engineering, University of Maribor, Maribor, Slovenia
| | - Karin Stana-Kleinschek
- Laboratory for Characterization and Processing of Polymers (LCPP), Faculty of Mechanical Engineering, University of Maribor, Maribor, Slovenia
| | - Evrim Umut
- Faculty of Mathematics and Computer Science, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
| | - Danuta Kruk
- Faculty of Mathematics and Computer Science, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
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12
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Kruk D, Masiewicz E, Umut E, Scharfetter H. 1H relaxation and dynamics of triphenylbismuth in deuterated solvents. Mol Phys 2019. [DOI: 10.1080/00268976.2018.1513175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Danuta Kruk
- Faculty of Mathematics and Computer Science, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
| | - Elzbieta Masiewicz
- Faculty of Mathematics and Computer Science, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
| | - Evrim Umut
- Faculty of Mathematics and Computer Science, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
| | - Hermann Scharfetter
- Institute of Medical Engineering, Graz University of Technology, Graz, Austria
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13
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Uguz SS, Ozvural EB, Beira MJ, Oztop MH, Sebastião PJ. Use of NMR Relaxometry to identify frankfurters of different meat sources. Mol Phys 2018. [DOI: 10.1080/00268976.2018.1542162] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Sirvan Sultan Uguz
- Department of Food Engineering, Middle East Technical University, Ankara, Turkey
| | - E. Burcin Ozvural
- Department of Food Engineering, Cankiri Karatekin University, Cankiri, Turkey
| | - Maria Jardim Beira
- CeFEMA – Center of Physics and Engineering of Advanced Materials and Department of Physics, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - Mecit Halil Oztop
- Department of Food Engineering, Middle East Technical University, Ankara, Turkey
| | - Pedro José Sebastião
- CeFEMA – Center of Physics and Engineering of Advanced Materials and Department of Physics, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
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14
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Beira MJ, Silva MP, Condesso M, Cosme P, Almeida PL, Corvo MC, Sebastião PJ, Figueirinhas JL, de Pinho MN. Molecular order and dynamics of water in hybrid cellulose acetate–silica asymmetric membranes. Mol Phys 2018. [DOI: 10.1080/00268976.2018.1537526] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- M. Jardim Beira
- Centro de Física e Engenharia de Materiais Avançados, Insiituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
- Departamento de Física, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - M. P. Silva
- Centro de Física e Engenharia de Materiais Avançados, Insiituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
- Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - M. Condesso
- Departamento de Física, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - P. Cosme
- Departamento de Física, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - P. L. Almeida
- CENIMAT/i3N- Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Caparica, Portugal
- ISEL, ADF, Rua Conselheiro Emídio Navarro 1, Lisboa, Portugal
| | - M. C. Corvo
- CENIMAT/i3N- Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Caparica, Portugal
| | - P. J. Sebastião
- Centro de Física e Engenharia de Materiais Avançados, Insiituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
- Departamento de Física, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - J. L. Figueirinhas
- Centro de Física e Engenharia de Materiais Avançados, Insiituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
- Departamento de Física, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - M. N. de Pinho
- Centro de Física e Engenharia de Materiais Avançados, Insiituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
- Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
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15
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Kruk D, Goesweiner C, Masiewicz E, Umut E, Sampl C, Scharfetter H. Model - free approach to quadrupole spin relaxation in solid 209Bi-aryl compounds. Phys Chem Chem Phys 2018; 20:23414-23423. [PMID: 30179238 DOI: 10.1039/c8cp03848a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nuclear Quadrupole Resonance (NQR) experiments were performed for deuterated and non-deuterated triphenylbismuth (BiPh3) to inquire into 209Bi relaxation mechanisms. The studies are motivated by the idea of exploiting Quadrupole Relaxation Enhancement (QRE) as a novel contrast mechanism for Magnetic Resonance Imaging. From this perspective relaxation features of nuclei possessing quadrupole moment (quadrupole nuclei) are of primary importance for the contrast effect. Spin-spin relaxation rates associated with the NQR lines were described in terms of the Redfield relaxation theory assuming that the relaxation is caused by fluctuations of the electric field gradient tensor at the position of the quadrupole nucleus that are described by an exponential correlation function. The description referred to as a model-free approach is an analogy of the description used for paramagnetic contrast agents. It was demonstrated that for the deuterated compound this approach captures the essential features of 209Bi relaxation, but it should not be applied for non-deuterated compounds as dipolar interactions between neighbouring protons and the quadrupole nucleus considerably contribute to the relaxation of the last one. Thus, the relaxation scenario for species containing quadrupole nuclei is fundamentally different than for paramagnetic contrast agents and this fact has to be taken into account when predicting contrast effects based on QRE.
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Affiliation(s)
- Danuta Kruk
- University of Warmia & Mazury in Olsztyn, Faculty of Mathematics and Computer Science, Słoneczna 54, PL-10710 Olsztyn, Poland.
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16
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Florek-Wojciechowska M, Jakubas R, Kruk D. Structure and dynamics of [NH 2(CH 3) 2] 3Sb 2Cl 9 by means of 1H NMR relaxometry - quadrupolar relaxation enhancement effects. Phys Chem Chem Phys 2018; 19:11197-11205. [PMID: 28405651 DOI: 10.1039/c7cp00788d] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
1H spin-lattice relaxation experiments have been performed for [NH2(CH3)2]3Sb2Cl9 (tris(dimethylammonium)nonachlorodiantimonate(iii)) in the temperature range of 253-313 K and a broad range of frequencies - from 4 kHz to 40 MHz. From the analysis of quadrupolar relaxation enhancement effects (quadrupolar peaks) associated with 14N nuclei, two lattice sites characterized by different electric field gradient tensors have been revealed. The 14N quadrupolar couplings and asymmetry parameters at these sites differ by a factor of about two. Three motional processes have been identified and attributed to the overall dynamics of the NH2(CH3)2 cations (slow motion), dynamics of the NH2 groups (intermediate motion) and methyl group rotation (fast motion). It has been shown that the slow dynamics is only weakly temperature dependent, while the intermediate and fast motional processes are characterized by activation energies of 2.92 kJ mol-1 and 0.41 kJ mol-1, respectively. The correlation time of the slow dynamics is of the order of μs, while the intermediate dynamics is faster by 2-3 orders of magnitude (depending on temperature). All correlation times have turned out to be independent of the position of the cations in the lattice (they are the same for both lattice sites). The analysis presented in this work is an example of the potential of the quadrupolar relaxation enhancement effects as a method revealing information on the dynamics and structure of solids.
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Affiliation(s)
- M Florek-Wojciechowska
- Department of Physics and Biophysics, University of Warmia & Mazury in Olsztyn, Oczapowskiego 4, 10-719 Olsztyn, Poland
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17
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Kruk D, Umut E, Masiewicz E, Sampl C, Fischer R, Spirk S, Goesweiner C, Scharfetter H. 209Bi quadrupole relaxation enhancement in solids as a step towards new contrast mechanisms in magnetic resonance imaging. Phys Chem Chem Phys 2018; 20:12710-12718. [DOI: 10.1039/c8cp00993g] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
209Bi containing species have the potential to become novel contrast agents for MRI.
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Affiliation(s)
- D. Kruk
- University of Warmia & Mazury in Olsztyn
- Faculty of Mathematics and Computer Science
- Słoneczna 54
- PL-10-710 Olsztyn
- Poland
| | - E. Umut
- University of Warmia & Mazury in Olsztyn
- Faculty of Mathematics and Computer Science
- Słoneczna 54
- PL-10-710 Olsztyn
- Poland
| | - E. Masiewicz
- University of Warmia & Mazury in Olsztyn
- Faculty of Mathematics and Computer Science
- Słoneczna 54
- PL-10-710 Olsztyn
- Poland
| | - C. Sampl
- Institute for Chemistry and Technology of Materials
- Graz University of Technology
- Stremayrgasse 9
- 8010 Graz
- Austria
| | - R. Fischer
- Institute for Chemistry and Technology of Materials
- Graz University of Technology
- Stremayrgasse 9
- 8010 Graz
- Austria
| | - S. Spirk
- Institute for Chemistry and Technology of Materials
- Graz University of Technology
- Stremayrgasse 9
- 8010 Graz
- Austria
| | - C. Goesweiner
- Institute of Medical Engineering
- Graz University of Technology
- Stremayrgasse 16/III
- A-8010 Graz
- Austria
| | - H. Scharfetter
- Institute of Medical Engineering
- Graz University of Technology
- Stremayrgasse 16/III
- A-8010 Graz
- Austria
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18
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Kruk D, Florek-Wojciechowska M, Jakubas R, Chaurasia SK, Brym S. Dynamics of Molecular Crystals by Means of1H NMR Relaxometry: Dynamical Heterogeneity versus Homogenous Motion. Chemphyschem 2016; 17:2329-39. [DOI: 10.1002/cphc.201600151] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Revised: 04/15/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Danuta Kruk
- University of Warmia & Mazury in Olsztyn; Faculty of Mathematics and Computer Science; Słoneczna 54 10-710 Olsztyn Poland
| | | | - Ryszard Jakubas
- Faculty of Chemistry; University of Wroclaw; Joliot Curie 14 50-383 Wrocław Poland
| | - Sujeet K. Chaurasia
- University of Warmia & Mazury in Olsztyn; Faculty of Mathematics and Computer Science; Słoneczna 54 10-710 Olsztyn Poland
| | - Szczepan Brym
- University of Warmia & Mazury in Olsztyn; Faculty of Mathematics and Computer Science; Słoneczna 54 10-710 Olsztyn Poland
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