{"title":"零至超低场固态核磁共振信号","authors":"K.K. George Kurian, P.K. Madhu, G. Rajalakshmi","doi":"10.1016/j.jmro.2022.100049","DOIUrl":null,"url":null,"abstract":"<div><p>Zero-to-ultra-low-field nuclear magnetic resonance (ZULF NMR) is fast emerging as a viable spectroscopic approach to study samples under conditions dominated by internal spin interactions. In the absence of the truncating effects of Zeeman interaction, the NMR signal is determined by <span><math><mi>J</mi></math></span>-coupling, dipole-dipole, and/or quadrupolar interactions. But, the low spin-precession frequencies and equilibrium spin polarisation in low external fields necessitate the use of special techniques for detecting the signals. In this article, spin evolution in ultra-low-field regime for various systems is studied and the expected NMR signals are evaluated for solid samples. The methodologies that can be used to make low-field detection feasible especially in case of solid samples are described.</p></div>","PeriodicalId":365,"journal":{"name":"Journal of Magnetic Resonance Open","volume":null,"pages":null},"PeriodicalIF":2.6240,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"Solid-state NMR signals at zero-to-ultra-low-field\",\"authors\":\"K.K. George Kurian, P.K. Madhu, G. Rajalakshmi\",\"doi\":\"10.1016/j.jmro.2022.100049\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Zero-to-ultra-low-field nuclear magnetic resonance (ZULF NMR) is fast emerging as a viable spectroscopic approach to study samples under conditions dominated by internal spin interactions. In the absence of the truncating effects of Zeeman interaction, the NMR signal is determined by <span><math><mi>J</mi></math></span>-coupling, dipole-dipole, and/or quadrupolar interactions. But, the low spin-precession frequencies and equilibrium spin polarisation in low external fields necessitate the use of special techniques for detecting the signals. In this article, spin evolution in ultra-low-field regime for various systems is studied and the expected NMR signals are evaluated for solid samples. The methodologies that can be used to make low-field detection feasible especially in case of solid samples are described.</p></div>\",\"PeriodicalId\":365,\"journal\":{\"name\":\"Journal of Magnetic Resonance Open\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.6240,\"publicationDate\":\"2022-06-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Magnetic Resonance Open\",\"FirstCategoryId\":\"1\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S266644102200019X\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Magnetic Resonance Open","FirstCategoryId":"1","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S266644102200019X","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Solid-state NMR signals at zero-to-ultra-low-field
Zero-to-ultra-low-field nuclear magnetic resonance (ZULF NMR) is fast emerging as a viable spectroscopic approach to study samples under conditions dominated by internal spin interactions. In the absence of the truncating effects of Zeeman interaction, the NMR signal is determined by -coupling, dipole-dipole, and/or quadrupolar interactions. But, the low spin-precession frequencies and equilibrium spin polarisation in low external fields necessitate the use of special techniques for detecting the signals. In this article, spin evolution in ultra-low-field regime for various systems is studied and the expected NMR signals are evaluated for solid samples. The methodologies that can be used to make low-field detection feasible especially in case of solid samples are described.