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- https://chem.libretexts.org/Bookshelves/Physical_and_Theoretical_Chemistry_Textbook_Maps/Supplemental_Modules_(Physical_and_Theoretical_Chemistry)/Spectroscopy/Magnetic_Resonance_Spectroscopies/Nuclear_Magnetic_Resonance/NMR_-_Theory/RelaxationRelaxation in NMR is a fundamental concept which describes the coherence loss of the magnetization in the x-y plane and the recovery of relaxation along the z-axis. There are many factors that contrib...Relaxation in NMR is a fundamental concept which describes the coherence loss of the magnetization in the x-y plane and the recovery of relaxation along the z-axis. There are many factors that contribute to the relaxation processes. This page will examine the different types of relaxation at a basic level.
- https://chem.libretexts.org/Bookshelves/Physical_and_Theoretical_Chemistry_Textbook_Maps/Supplemental_Modules_(Physical_and_Theoretical_Chemistry)/Spectroscopy/Magnetic_Resonance_Spectroscopies/Nuclear_Magnetic_Resonance/Nuclear_Magnetic_Resonance_IINuclear Magnetic Resonance (NMR) is a nuclei (Nuclear) specific spectroscopy that has far reaching applications throughout the physical sciences and industry. NMR uses a large magnet (Magnetic) to pro...Nuclear Magnetic Resonance (NMR) is a nuclei (Nuclear) specific spectroscopy that has far reaching applications throughout the physical sciences and industry. NMR uses a large magnet (Magnetic) to probe the intrinsic spin properties of atomic nuclei. Like all spectroscopies, NMR uses a component of electromagnetic radiation (radio frequency waves) to promote transitions between nuclear energy levels (Resonance). Most chemists use NMR for structure determination of small molecules.
- https://chem.libretexts.org/Courses/University_of_Illinois_Springfield/Introduction_to_Organic_Spectroscopy/5%3A_Proton_Nuclear_Magnetic_Resonance_Spectroscopy_(NMR)/5.02%3A_IntroductionNuclear Magnetic Resonance (NMR) is a nuceli (Nuclear) specific spectroscopy that has far reaching applications throughout the physical sciences and industry. NMR uses a large magnet (Magnetic) to pro...Nuclear Magnetic Resonance (NMR) is a nuceli (Nuclear) specific spectroscopy that has far reaching applications throughout the physical sciences and industry. NMR uses a large magnet (Magnetic) to probe the intrinsic spin properties of atomic nuclei. Like all spectroscopies, NMR uses a component of electromagnetic radiation (radio frequency waves) to promote transitions between nuclear energy levels (Resonance). Most chemists use NMR for structure determination of small molecules.
- https://chem.libretexts.org/Bookshelves/Organic_Chemistry/Introduction_to_Organic_Spectroscopy/05%3A_Proton_Nuclear_Magnetic_Resonance_Spectroscopy_(NMR)/5.02%3A_Theory_of_NMRThe cause for this is due to the movement of the electrons in the pi bond of the carbon-carbon double bond and how the magnetic field effects the protons bound to the pi bond. The circular motion actu...The cause for this is due to the movement of the electrons in the pi bond of the carbon-carbon double bond and how the magnetic field effects the protons bound to the pi bond. The circular motion actually reinforces the external field at the edge of the double bond on both sides of the pi bond but creates a local field (shown in purple and green) that opposes the external field in the center of the double bond.
- https://chem.libretexts.org/Courses/University_of_Illinois_Springfield/Introduction_to_Organic_Spectroscopy/5%3A_Proton_Nuclear_Magnetic_Resonance_Spectroscopy_(NMR)/5.04%3A_Theory/RelaxationOne can easily imagine that in the absence of any other effects, the magnetization in the x-y plane will recover along the z-axis as the external magnetic field forces the spins to align with it. For ...One can easily imagine that in the absence of any other effects, the magnetization in the x-y plane will recover along the z-axis as the external magnetic field forces the spins to align with it. For \(T_1\) relaxation, the correlation time must be on the order of the larmor frequency of the nucleus, while the correlation time for the for \(T_2\) must be on the order of the inverse of the linewidth to make effects.
