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Concepts in Magnetic Resonance Part A最新文献

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Optimization of a parallel‐plate RF probe for high resolution thin film imaging 用于高分辨率薄膜成像的平行板射频探针的优化
IF 0.6 4区 化学
Concepts in Magnetic Resonance Part A Pub Date : 2018-01-01 DOI: 10.1002/CMR.A.21465
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}
引用次数: 7
3D printed NMR spectra: From 1D and 2D acquisition to 3D visualization 3D打印核磁共振光谱:从1D和2D采集到3D可视化
IF 0.6 4区 化学
Concepts in Magnetic Resonance Part A Pub Date : 2018-01-01 DOI: 10.1002/CMR.A.21470
M. Bakker, Benjamin Boyd, G. Meints
{"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}
引用次数: 3
Complete multinuclear solid-state NMR of metal-organic frameworks: The case of α-Mg-formate 金属-有机骨架的完整多核固体核磁共振:α- mg -甲酸酯的情况
IF 0.6 4区 化学
Concepts in Magnetic Resonance Part A Pub Date : 2017-12-05 DOI: 10.1002/cmr.a.21410
Bryan E. G. Lucier, Yue Zhang, Yining Huang
{"title":"Complete multinuclear solid-state NMR of metal-organic frameworks: The case of α-Mg-formate","authors":"Bryan E. G. Lucier,&nbsp;Yue Zhang,&nbsp;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}
引用次数: 10
Analysis of the multi-echo spin-echo pulse sequence 多回波自旋回波脉冲序列分析
IF 0.6 4区 化学
Concepts in Magnetic Resonance Part A Pub Date : 2017-12-04 DOI: 10.1002/cmr.a.21402
Yuval Zur
{"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}
引用次数: 4
NMR Concepts 核磁共振的概念
IF 0.6 4区 化学
Concepts in Magnetic Resonance Part A Pub Date : 2017-11-23 DOI: 10.1002/cmr.a.21405
{"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}
引用次数: 0
2017-2020 Editorial Board 2017-2020编辑委员会
IF 0.6 4区 化学
Concepts in Magnetic Resonance Part A Pub Date : 2017-11-23 DOI: 10.1002/cmr.a.21404
{"title":"2017-2020 Editorial Board","authors":"","doi":"10.1002/cmr.a.21404","DOIUrl":"https://doi.org/10.1002/cmr.a.21404","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.21404","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"109173568","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}
引用次数: 0
DVD Review DVD的评论
IF 0.6 4区 化学
Concepts in Magnetic Resonance Part A Pub Date : 2017-11-23 DOI: 10.1002/cmr.a.21388
{"title":"DVD Review","authors":"","doi":"10.1002/cmr.a.21388","DOIUrl":"https://doi.org/10.1002/cmr.a.21388","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.21388","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"109173570","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}
引用次数: 0
Probing nitrite ion dynamics in NaNO2 crystals by solid-state 17O NMR 用固态17O核磁共振探测纳米2晶体中亚硝酸盐离子动力学
IF 0.6 4区 化学
Concepts in Magnetic Resonance Part A Pub Date : 2017-11-17 DOI: 10.1002/cmr.a.21409
Yizhe Dai, Ivan Hung, Zhehong Gan, Gang Wu
{"title":"Probing nitrite ion dynamics in NaNO2 crystals by solid-state 17O NMR","authors":"Yizhe Dai,&nbsp;Ivan Hung,&nbsp;Zhehong Gan,&nbsp;Gang Wu","doi":"10.1002/cmr.a.21409","DOIUrl":"10.1002/cmr.a.21409","url":null,"abstract":"<p>We report a solid-state <sup>17</sup>O (<i>I</i> = 5/2) NMR study of the nitrite ion dynamics in crystalline NaNO<sub>2</sub>. Variable temperature (VT) <sup>17</sup>O NMR spectra were recorded at 3 magnetic fields, 11.7, 14.1, and 21.1 T. The VT <sup>17</sup>O NMR data suggest that the ion in the ferroelectric phase of NaNO<sub>2</sub> undergoes 2-fold flip motion about the crystallographic <i>b</i> axis and the corresponding rotational barrier is 68 ± 5 kJ mol<sup>−1</sup>. We also obtained a 2D <sup>17</sup>O EXSY spectrum for a stationary sample of NaNO<sub>2</sub> at 250 K, which, in combination with 1D <sup>17</sup>O NMR spectral analyses, allowed precise determination of the relative orientation between the <sup>17</sup>O quadrupolar coupling and chemical shift tensors in the molecular frame of reference. The experimentally determined <sup>17</sup>O NMR tensors for NaNO<sub>2</sub> were in agreement with quantum chemical calculations produced by a periodic DFT code BAND.</p>","PeriodicalId":55216,"journal":{"name":"Concepts in Magnetic Resonance Part A","volume":"45A 6","pages":""},"PeriodicalIF":0.6,"publicationDate":"2017-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/cmr.a.21409","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77604413","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}
引用次数: 5
Examining the importance of the level of computational theory used in solution-phase structural determinations by NMR using residual dipolar couplings 利用残余偶极偶联检验核磁共振在溶液相结构测定中计算理论水平的重要性
IF 0.6 4区 化学
Concepts in Magnetic Resonance Part A Pub Date : 2017-11-01 DOI: 10.1002/cmr.a.21400
Diana Tabada, Faranak Mahmoudi, William R. Carroll
{"title":"Examining the importance of the level of computational theory used in solution-phase structural determinations by NMR using residual dipolar couplings","authors":"Diana Tabada,&nbsp;Faranak Mahmoudi,&nbsp;William R. Carroll","doi":"10.1002/cmr.a.21400","DOIUrl":"10.1002/cmr.a.21400","url":null,"abstract":"<p>The structures of many small molecules have been determined using residual dipolar couplings (RDCs) and the singular value decomposition method (SVD). Here, a key part of the SVD method is examined. The methods used to predict the 3-dimensional structures of molecules used in the SVD methodology for comparison with RDCs were examined for their impact on the quality of agreement that those structures had with observed RDCs. It was observed that the method of generating a proposed structure had a great impact on the quality of agreement with observed spectral data and that more computationally intensive methods of proposing structures provided better agreement with the observed RDCs in the control molecule.</p>","PeriodicalId":55216,"journal":{"name":"Concepts in Magnetic Resonance Part A","volume":"45A 4","pages":""},"PeriodicalIF":0.6,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/cmr.a.21400","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75239860","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}
引用次数: 0
Retracted: A review of the nuclear magnetic resonance physics and application in petroleum industry 核磁共振物理及其在石油工业中的应用综述
IF 0.6 4区 化学
Concepts in Magnetic Resonance Part A Pub Date : 2017-11-01 DOI: 10.1002/cmr.a.21399
{"title":"Retracted: A review of the nuclear magnetic resonance physics and application in petroleum industry","authors":"","doi":"10.1002/cmr.a.21399","DOIUrl":"10.1002/cmr.a.21399","url":null,"abstract":"<div>\u0000 \u0000 <section>\u0000 \u0000 <p>The above article from Concepts in Magnetic Resonance Part A, published online on November 1, 2017 in Wiley Online Library (http://onlinelibrary.wiley.com/), has been retracted following consultation between the authors, the journal Editor in Chief, Daniel D. Traficante, Assistant Editor David Rovnyak and Wiley Periodicals, Inc. The reason for the retraction is that it has been agreed that <b>Figures 6-11, 13, 14, and 22</b> were used without permission from the owner of the figures.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Reference</h3>\u0000 \u0000 <p> <span>Ashqar, A</span>. <span>A review of the nuclear magnetic resonance physics and application in petroleum industry</span>. <i>Concepts Magn Reson Part A</i>. <span>2017</span>; <span>e21399</span>. https://doi.org/10.1002/cmr.a.21399</p>\u0000 </section>\u0000 </div>","PeriodicalId":55216,"journal":{"name":"Concepts in Magnetic Resonance Part A","volume":"45A 4","pages":""},"PeriodicalIF":0.6,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/cmr.a.21399","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79368503","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}
引用次数: 1
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