Magnetic Resonance Letters最新文献_第3页

Illuminating β-arrestin conformational dynamics by fluorine NMR 用氟 NMR 揭示 β-restin 的构象动态

Magnetic Resonance Letters Pub Date : 2024-05-01 DOI: 10.1016/j.mrl.2024.200115

Bin Xia

引用次数: 0

Revealing structure correlation between ionic liquid and metal-organic framework matrix 揭示离子液体与金属有机框架基质之间的结构相关性

Magnetic Resonance Letters Pub Date : 2024-05-01 DOI: 10.1016/j.mrl.2023.12.003

Ligang Xu , Wenda Zhang , Chenjie Lou , Chenxu Geng , Yuxiu Sun , Jie Liu , Yongchao Shi , Huajie Luo , Jipeng Fu , Haiyan Zheng , Mingxue Tang

引用次数: 0

Operando NMR methods for studying electrocatalysis 研究电催化的运算核磁共振方法

Magnetic Resonance Letters Pub Date : 2024-05-01 DOI: 10.1016/j.mrl.2023.12.004

Zhiyu Zhu, Ruipeng Luo, Evan Wenbo Zhao

{"title":"Operando NMR methods for studying electrocatalysis","authors":"Zhiyu Zhu, Ruipeng Luo, Evan Wenbo Zhao","doi":"10.1016/j.mrl.2023.12.004","DOIUrl":"10.1016/j.mrl.2023.12.004","url":null,"abstract":"<div>The combination of electrochemical measurements with spectroscopic characterizations provides valuable insights into reaction mechanisms. Nuclear magnetic resonance (NMR) spectroscopy, as a powerful technique due to its atomic specificity and versatility in studying gas, liquid, and solid, allows the study of electrolyte solution, catalyst and catalyst-adsorbate interfaces. When applied in operando, NMR can offer molecular-level insights into various electrochemical processes. Operando NMR has been applied extensively in battery research, but relatively underexplored for electrocatalysis in the past two decades. In this mini review, we first introduce the operando electrochemical NMR setups, categorized by different probe designs. Then we review the applications of operando NMR for monitoring the electrolyte solution and the catalyst-adsorbate interface. Considering the high environmental impact of electrochemical conversion of CO2 into value-added products, we zoom in to the use of operando NMR in studying electrochemical CO2 reduction. Finally, we provide our perspective on further developing and applying operando NMR methods for understanding the complex reaction network of Cu-catalyzed electrochemical CO2 reduction.</div>","PeriodicalId":93594,"journal":{"name":"Magnetic Resonance Letters","volume":"4 2","pages":"Article 100096"},"PeriodicalIF":0.0,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772516224000032/pdfft?md5=6e8045bc26f18bbbb054d13d27f355ad&pid=1-s2.0-S2772516224000032-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139454451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Solid-state NMR study on sodium intercalation at low voltage window for Na3V2(PO4)3 as an anode 以 Na3V2(PO4)3 为阳极的低电压窗口钠插层固态核磁共振研究

Magnetic Resonance Letters Pub Date : 2024-05-01 DOI: 10.1016/j.mrl.2023.12.001

Yuxin Liao, Fushan Geng, Ming Shen, Bingwen Hu

引用次数: 0

Experimental aspects of 14N overtone RESPDOR solid-state NMR spectroscopy under MAS beyond 60 kHz 超过 60 kHz MAS 条件下 14N 泛音 RESPDOR 固态 NMR 光谱的实验问题

Magnetic Resonance Letters Pub Date : 2024-02-01 DOI: 10.1016/j.mrl.2023.12.002

Yutaro Ogaeri, Yusuke Nishiyama

{"title":"Experimental aspects of 14N overtone RESPDOR solid-state NMR spectroscopy under MAS beyond 60 kHz","authors":"Yutaro Ogaeri, Yusuke Nishiyama","doi":"10.1016/j.mrl.2023.12.002","DOIUrl":"10.1016/j.mrl.2023.12.002","url":null,"abstract":"<div>Nitrogen-14 (14N) overtone (OT) spectroscopy under fast magic angle spinning (MAS) conditions (>60 kHz) has emerged as a powerful technique for observing correlations and distances between 14N and 1H, owing to the absence of the first-order quadrupolar broadenings. In addition, 14NOT allows selective manipulation of 14N nuclei for each site. Despite extensive theoretical and experimental studies, the spin dynamics of 14NOT remains under debate. In this study, we conducted experimental investigations to assess the spin dynamics of 14NOT using the rotational-echo saturation-pulse double-resonance (RESPDOR) sequence, which monitors population transfer induced by a14NOT pulse. The 14NOT spin dynamics is well represented by a model of a two-energy-level system. Unlike spin-1/2, the maximum excitation efficiency of 14NOT coherences of powdered solids, denoted by p, depends on the radiofrequency field (rf-field) strength due to orientation dependence of effective nutation fields even when pulse lengths are optimized. It is also found that the p factor, contributing to the 14NOT spin dynamics, is nearly independent of the B0 field. Consequently, the filtering efficiency of RESPDOR experiments exhibits negligible dependence on B0 when the 14NOT pulse length is optimized. The study also identifies the optimal experimental conditions for 14NOT/1H RESPDOR correlation experiments.</div>","PeriodicalId":93594,"journal":{"name":"Magnetic Resonance Letters","volume":"4 1","pages":"Article 100094"},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772516224000019/pdfft?md5=9a4f60e3a6dca75955692e66d827a99f&pid=1-s2.0-S2772516224000019-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139393896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multinuclear MR and MRI study of lithium-ion cells using a variable field magnet and a fixed frequency RF probe 使用可变磁场磁铁和固定频率射频探针对锂离子电池进行多核磁共振和核磁共振成像研究

Magnetic Resonance Letters Pub Date : 2024-02-01 DOI: 10.1016/j.mrl.2023.11.002

Andrés Ramírez Aguilera , Florin Marica , Kevin J. Sanders , Md Al Raihan , C. Adam Dyker , Gillian R. Goward , Bruce J. Balcom

{"title":"Multinuclear MR and MRI study of lithium-ion cells using a variable field magnet and a fixed frequency RF probe","authors":"Andrés Ramírez Aguilera , Florin Marica , Kevin J. Sanders , Md Al Raihan , C. Adam Dyker , Gillian R. Goward , Bruce J. Balcom","doi":"10.1016/j.mrl.2023.11.002","DOIUrl":"10.1016/j.mrl.2023.11.002","url":null,"abstract":"<div>An exploratory multinuclear magnetic resonance (MR) and magnetic resonance imaging (MRI) study was performed on lithium-ion battery cells with 7Li, 19F, and 1H measurements. A variable field superconducting magnet with a fixed frequency parallel-plate radiofrequency (RF) probe was employed in the study. The magnetic field was changed to set the resonance frequency of each nucleus to the fixed RF probe frequency of 33.7 MHz. Two cartridge-like lithium-ion cells, with graphite anodes and LiNi0.5Mn0.3Co0.2O2 (NMC) cathodes, were interrogated. One cell was pristine, and one was charged to a cell voltage of 4.2 V. The results presented demonstrate the great potential of the variable field magnet approach in multinuclear measurement of lithium-ion batteries. These methods open the door for developing faster and simpler methods for detecting, quantifying, and interpreting MR and MRI data from lithium-ion and other batteries.</div>","PeriodicalId":93594,"journal":{"name":"Magnetic Resonance Letters","volume":"4 1","pages":"Article 100090"},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772516223000645/pdfft?md5=09065aef35eb0cafacf873c791cc09e0&pid=1-s2.0-S2772516223000645-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138608341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Qualitative analysis of aromatic compounds via 1D TOCSY techniques 通过一维 TOCSY 技术定性分析芳香族化合物

Magnetic Resonance Letters Pub Date : 2024-02-01 DOI: 10.1016/j.mrl.2023.11.003

Wenbo Dong , Qi Zhao , Jiancheng Zhao , Jiarong Zhang , Yingxiong Wang , Yan Qiao

{"title":"Qualitative analysis of aromatic compounds via 1D TOCSY techniques","authors":"Wenbo Dong , Qi Zhao , Jiancheng Zhao , Jiarong Zhang , Yingxiong Wang , Yan Qiao","doi":"10.1016/j.mrl.2023.11.003","DOIUrl":"10.1016/j.mrl.2023.11.003","url":null,"abstract":"<div>The aromatic compounds, including o-xylene, m-xylene, p-xylene, and ethylbenzene, primarily originate from the catalytic reforming of crude oil, and have a wide variety of applications. However, because of similar physical and chemical properties, these compounds are difficult to be identified by gas chromatography (GC) without standard samples. With the development of modern nuclear magnetic resonance (NMR) techniques, NMR has emerged as a powerful and efficient tool for the rapid analysis of complex and crude mixtures without purification. In this study, the parameters of one-dimensional (1D) total correlation spectroscopy (TOCSY) NMR techniques, including 1D selective gradient TOCSY and 1D chemical-shift-selective filtration (CSSF) with TOCSY, were optimized to obtain comprehensive molecular structure information. The results indicate that the overlapped signals in NMR spectra of nonpolar aromatic compounds (including o-xylene, m-xylene, p-xylene and ethylbenzene), polar aromatic compounds (benzyl alcohol, benzaldehyde, benzoic acid), and aromatic compounds with additional conjugated bonds (styrene) can be resolved in 1D TOCSY. More importantly, full molecular structures can be clearly distinguished by setting appropriate mixing time in 1D TOCSY. This approach simplifies the NMR spectra, provides structural information of entire molecules, and can be applied for the analysis of other structural isomers.</div>","PeriodicalId":93594,"journal":{"name":"Magnetic Resonance Letters","volume":"4 1","pages":"Article 100091"},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772516223000657/pdfft?md5=79c75a54fe173e6197e711ad69a543fd&pid=1-s2.0-S2772516223000657-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138625366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rheo-NMR: A versatile hyphenated technique for capturing molecular dynamics and structure under flow 流变核磁共振：捕捉流动状态下分子动力学和结构的多功能联用技术

Magnetic Resonance Letters Pub Date : 2024-02-01 DOI: 10.1016/j.mrl.2023.10.002

Yuqi Xiong , Zishuo Wu , Lei Wu , Chengyan Li , Wei Chen

引用次数: 0

Deep learning for determining pure isotropic proton spectra from solid-state spectra 利用深度学习从固态光谱确定纯各向同性质子光谱

Magnetic Resonance Letters Pub Date : 2024-02-01 DOI: 10.1016/j.mrl.2023.11.001

Mengjie Qiu, Zhong Chen, Yanqin Lin

引用次数: 0

Human islet amyloid polypeptide oligomers stabilized and probed by MAS NMR 通过 MAS NMR 稳定和探测人胰岛淀粉样多肽寡聚体

Magnetic Resonance Letters Pub Date : 2024-02-01 DOI: 10.1016/j.mrl.2023.10.001

Ziwei Chang, Zhengfeng Zhang

引用次数: 0