{"title":"2017-2020 Editorial Board","authors":"","doi":"10.1002/cmr.a.21408","DOIUrl":"https://doi.org/10.1002/cmr.a.21408","url":null,"abstract":"","PeriodicalId":55216,"journal":{"name":"Concepts in Magnetic Resonance Part A","volume":"45A 4","pages":""},"PeriodicalIF":0.6,"publicationDate":"2018-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/cmr.a.21408","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"109166095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"NMR Concepts","authors":"","doi":"10.1002/cmr.a.21407","DOIUrl":"https://doi.org/10.1002/cmr.a.21407","url":null,"abstract":"","PeriodicalId":55216,"journal":{"name":"Concepts in Magnetic Resonance Part A","volume":"45A 4","pages":""},"PeriodicalIF":0.6,"publicationDate":"2018-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/cmr.a.21407","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"109166094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Anomalous proton spin‐lattice relaxation in organic compounds containing methyl groups","authors":"L. Latanowicz, A. Timoszyk, J. Kozioł","doi":"10.1002/CMR.A.21471","DOIUrl":"https://doi.org/10.1002/CMR.A.21471","url":null,"abstract":"","PeriodicalId":55216,"journal":{"name":"Concepts in Magnetic Resonance Part A","volume":"52 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91143426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Simple eddy current compensation by additional gradient pulses","authors":"B. Niederländer, P. Blümler","doi":"10.1002/CMR.A.21469","DOIUrl":"https://doi.org/10.1002/CMR.A.21469","url":null,"abstract":"","PeriodicalId":55216,"journal":{"name":"Concepts in Magnetic Resonance Part A","volume":"118 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77475702","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Calculation of Larmor precession frequency in magnetically heterogeneous media","authors":"A. Ruh, V. Kiselev","doi":"10.1002/CMR.A.21472","DOIUrl":"https://doi.org/10.1002/CMR.A.21472","url":null,"abstract":"","PeriodicalId":55216,"journal":{"name":"Concepts in Magnetic Resonance Part A","volume":"9 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75510187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. R. Aguilera, B. MacMillan, G. Goward, B. Balcom
{"title":"Optimization of a parallel‐plate RF probe for high resolution thin film imaging","authors":"A. R. Aguilera, B. MacMillan, G. Goward, B. Balcom","doi":"10.1002/CMR.A.21465","DOIUrl":"https://doi.org/10.1002/CMR.A.21465","url":null,"abstract":"","PeriodicalId":55216,"journal":{"name":"Concepts in Magnetic Resonance Part A","volume":"27 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76430368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"3D printed NMR spectra: From 1D and 2D acquisition to 3D visualization","authors":"M. Bakker, Benjamin Boyd, G. Meints","doi":"10.1002/CMR.A.21470","DOIUrl":"https://doi.org/10.1002/CMR.A.21470","url":null,"abstract":"","PeriodicalId":55216,"journal":{"name":"Concepts in Magnetic Resonance Part A","volume":"67 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86033815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Metal-organic frameworks (MOFs) are exciting porous materials with a growing number of applications ranging from catalysis to gas storage. Establishing logical connections between the local MOF structure and its properties is not often straightforward, however, solid-state NMR is a sensitive probe of local structure and can be used to shed light on processes such as guest adsorption and gas motion within MOFs. As illustrated using our recent works on the microporous α-Mg-formate (Mg3(HCOO)6) MOF, complete multinuclear solid-state NMR characterization of MOFs is now possible, and can provide unique insight that is not readily available through other methods. A wide variety of solid-state NMR techniques have been employed, including direct-excitation, cross-polarization, fast magic-angle spinning, and two-dimensional experiments. New variable-temperature 2H solid-state NMR data of deuterated hydrogen gas within α-Mg-formate and the resulting detailed dynamic information is also presented, analyzed, and discussed.
{"title":"Complete multinuclear solid-state NMR of metal-organic frameworks: The case of α-Mg-formate","authors":"Bryan E. G. Lucier, Yue Zhang, Yining Huang","doi":"10.1002/cmr.a.21410","DOIUrl":"10.1002/cmr.a.21410","url":null,"abstract":"<p>Metal-organic frameworks (MOFs) are exciting porous materials with a growing number of applications ranging from catalysis to gas storage. Establishing logical connections between the local MOF structure and its properties is not often straightforward, however, solid-state NMR is a sensitive probe of local structure and can be used to shed light on processes such as guest adsorption and gas motion within MOFs. As illustrated using our recent works on the microporous α-Mg-formate (Mg<sub>3</sub>(HCOO)<sub>6</sub>) MOF, complete multinuclear solid-state NMR characterization of MOFs is now possible, and can provide unique insight that is not readily available through other methods. A wide variety of solid-state NMR techniques have been employed, including direct-excitation, cross-polarization, fast magic-angle spinning, and two-dimensional experiments. New variable-temperature <sup>2</sup>H solid-state NMR data of deuterated hydrogen gas within α-Mg-formate and the resulting detailed dynamic information is also presented, analyzed, and discussed.</p>","PeriodicalId":55216,"journal":{"name":"Concepts in Magnetic Resonance Part A","volume":"45A 6","pages":""},"PeriodicalIF":0.6,"publicationDate":"2017-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/cmr.a.21410","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80526984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The multi-echo spin-echo sequence is a series of operators, referred to as periodic operators. Each periodic operator consists of a free rotation (no RF), a refocusing RF pulse, and another free rotation, identical to the first one. A preparation operator that precedes the periodic operators converts the equilibrium magnetization Mz into an initial magnetization Mi. It is shown that a multi-echo sequence is equivalent to a simple rotation of the magnetization about a tilted axis. The component of Mi along the rotation axis is stationary and provides a stable signal, denoted pseudo steady-state. The perpendicular component rotates and eventually de-phases. Using this model, we derive analytic expressions to the signal for different preparation operators, and show how to align Mi with the rotation axis such that the signal is maximized. A simple and efficient algorithm is presented to calculate the Fourier coefficients of the magnetization during the sequence using the discrete Fourier transform. Finally, formulas of the echo signal when unavoidable phase errors are generated are derived. We show how to eliminate artifacts caused by these errors and restore the original image.
{"title":"Analysis of the multi-echo spin-echo pulse sequence","authors":"Yuval Zur","doi":"10.1002/cmr.a.21402","DOIUrl":"10.1002/cmr.a.21402","url":null,"abstract":"<p>The multi-echo spin-echo sequence is a series of operators, referred to as periodic operators. Each periodic operator consists of a free rotation (no RF), a refocusing RF pulse, and another free rotation, identical to the first one. A preparation operator that precedes the periodic operators converts the equilibrium magnetization <b>M</b><sub><b>z</b></sub> into an initial magnetization <b>M</b><sub><b>i</b></sub>. It is shown that a multi-echo sequence is equivalent to a simple rotation of the magnetization about a tilted axis. The component of <b>M</b><sub><b>i</b></sub> along the rotation axis is stationary and provides a stable signal, denoted pseudo steady-state. The perpendicular component rotates and eventually de-phases. Using this model, we derive analytic expressions to the signal for different preparation operators, and show how to align <b>M</b><sub><b>i</b></sub> with the rotation axis such that the signal is maximized. A simple and efficient algorithm is presented to calculate the Fourier coefficients of the magnetization during the sequence using the discrete Fourier transform. Finally, formulas of the echo signal when unavoidable phase errors are generated are derived. We show how to eliminate artifacts caused by these errors and restore the original image.</p>","PeriodicalId":55216,"journal":{"name":"Concepts in Magnetic Resonance Part A","volume":"46A 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2017-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/cmr.a.21402","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89878808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"NMR Concepts","authors":"","doi":"10.1002/cmr.a.21405","DOIUrl":"https://doi.org/10.1002/cmr.a.21405","url":null,"abstract":"","PeriodicalId":55216,"journal":{"name":"Concepts in Magnetic Resonance Part A","volume":"45A 3","pages":""},"PeriodicalIF":0.6,"publicationDate":"2017-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/cmr.a.21405","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"109173571","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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