Abstract
Longitudinal multispin orders can be created in spin systems that exhibit scalar, dipolar or quadrupolar couplings. They provide an effective way for measurement of scalar couplings and also to probe molecular interactions and dynamics. They cannot be separated by phase cycling or gradient selection methods which are the only known modes of separating different coherences. In this review we describe the frequency cycling procedure for separating various orders in weakly and strongly coupled spin systems. We provide the analytical solutions that permit determination of the frequency cycle for different spin systems. We also discuss the creation of longitudinal orders through relaxation. Finally we highlight the potential applications including spectral editing, measurement of relative signs of scalar couplings and structural properties of molecules.
Keywords: Magnetic resonance spectroscopy, Frequency cycling, Longitudinal orders, Weak coupling, Strong coupling, Scalar couplings
Current Analytical Chemistry
Title: Magnetic Resonance Spectroscopy with Longitudinal Multispin Orders
Volume: 4 Issue: 1
Author(s): S. Sendhil Velan, Kumar Pichumani, David Murray, Raymond R. Raylman, Tricia Scott, Ayyakannu Manivannan and Larry Halliburton
Affiliation:
Keywords: Magnetic resonance spectroscopy, Frequency cycling, Longitudinal orders, Weak coupling, Strong coupling, Scalar couplings
Abstract: Longitudinal multispin orders can be created in spin systems that exhibit scalar, dipolar or quadrupolar couplings. They provide an effective way for measurement of scalar couplings and also to probe molecular interactions and dynamics. They cannot be separated by phase cycling or gradient selection methods which are the only known modes of separating different coherences. In this review we describe the frequency cycling procedure for separating various orders in weakly and strongly coupled spin systems. We provide the analytical solutions that permit determination of the frequency cycle for different spin systems. We also discuss the creation of longitudinal orders through relaxation. Finally we highlight the potential applications including spectral editing, measurement of relative signs of scalar couplings and structural properties of molecules.
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Cite this article as:
Velan Sendhil S., Pichumani Kumar, Murray David, Raylman R. Raymond, Scott Tricia, Manivannan Ayyakannu and Halliburton Larry, Magnetic Resonance Spectroscopy with Longitudinal Multispin Orders, Current Analytical Chemistry 2008; 4 (1) . https://dx.doi.org/10.2174/157341108783339106
DOI https://dx.doi.org/10.2174/157341108783339106 |
Print ISSN 1573-4110 |
Publisher Name Bentham Science Publisher |
Online ISSN 1875-6727 |
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