Kiryutin, Alexey S., Mikhail S. Panov, Alexandra V. Yurkovskaya, Konstantin L. Ivanov, and Geoffrey Bodenhausen. “Proton Relaxometry of Long-Lived Spin Order.” ChemPhysChem, January 2, 2019.
A study of long-lived spin order in chlorothiophene carboxylates at both high and low magnetic fields is described. Careful sample preparation (removal of dissolved oxygen in solution, chelating of paramagnetic impurities, reduction of convection) allows one to obtain very long-lived singlet order of the two coupled protons in chlorothiophene derivatives, having lifetimes TLLS of about 130 s in D2O and 240 s in deuterated methanol, which are much longer than the T1-relaxation times (18 and 30 s, respectively, at a field B0 = 9.4 T). In protonated solvents the relaxation times become shorter, but TLLS is still substantially longer than T1 . In addition, long-lived coherences are shown to have lifetimes TLLS as long as 30 s. Thiophene derivatives can be used as molecular tags to study slow transport, slow dynamics and slow chemical processes, as some of us have shown in recent years.
Long-lived spin states as a source of contrast in magnetic resonance spectroscopy and imaging
From The DNP-NMR Blog:
Long-lived spin states as a source of contrast in magnetic resonance spectroscopy and imaging
Kiryutin, A.S., et al., Long-lived spin states as a source of contrast in magnetic resonance spectroscopy and imaging. J Magn Reson, 2015. 261: p. 64-72.
http://www.ncbi.nlm.nih.gov/pubmed/26529204
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03-25-2016 04:12 PM
Long-lived spin States for low-field hyperpolarized gas MRI
From The DNP-NMR Blog:
Long-lived spin States for low-field hyperpolarized gas MRI
Kovtunov, K.V., et al., Long-lived spin States for low-field hyperpolarized gas MRI. Chemistry, 2014. 20(45): p. 14629-32.
http://www.ncbi.nlm.nih.gov/pubmed/25263795
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02-13-2015 05:31 PM
Long-lived spin States for low-field hyperpolarized gas MRI
From The DNP-NMR Blog:
Long-lived spin States for low-field hyperpolarized gas MRI
Kovtunov, K.V., et al., Long-lived spin States for low-field hyperpolarized gas MRI. Chemistry, 2014. 20(45): p. 14629-32.
http://www.ncbi.nlm.nih.gov/pubmed/25263795
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02-04-2015 09:57 PM
Storage of nuclear magnetization as long-lived singlet order in low magnetic field
From The DNP-NMR Blog:
Storage of nuclear magnetization as long-lived singlet order in low magnetic field
This week I will catch up with some articles that were published in the Proceedings of the National Academy of Sciences that slipped through the crack.
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07-21-2014 05:32 PM
Long-lived spin state of a tripeptide in stretched hydrogel
Long-lived spin state of a tripeptide in stretched hydrogel
Abstract
The longitudinal (T 1), transverse (T 2), and singlet state (T s) relaxation times of the geminal backbone protons (CH2) of l-Leu-Gly-Gly were studied by NMR spectroscopy at 9.4 T in a bovine hide gelatin gel composed in D2O at 25Â*°C. Gelatin granules were dissolved in a hot solution of the tripeptide and then the solution was allowed to gel inside a flexible silicone tubing. With increases in gelatin content, the T...
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Journal club
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06-19-2014 10:21 PM
Long-lived nuclear spin states in methyl groups and quantum-rotor-induced polarization
From The DNP-NMR Blog:
Long-lived nuclear spin states in methyl groups and quantum-rotor-induced polarization
Meier, B., et al., Long-lived nuclear spin states in methyl groups and quantum-rotor-induced polarization. J Am Chem Soc, 2013. 135(50): p. 18746-9.
http://www.ncbi.nlm.nih.gov/pubmed/24252212
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02-13-2014 01:42 AM
Magnetic Resonance Force Microscopy Detected Long-Lived Spin Magnetization
From The DNP-NMR Blog:
Magnetic Resonance Force Microscopy Detected Long-Lived Spin Magnetization
Chen, L., et al., Magnetic Resonance Force Microscopy Detected Long-Lived Spin Magnetization. Magnetics, IEEE Transactions on, 2013. 49(7): p. 3528-3532.
http://dx.doi.org/10.1109/TMAG.2013.2239268
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08-23-2013 02:29 PM
Long-Lived States to Monitor Protein Unfolding by Proton NMR.
Long-Lived States to Monitor Protein Unfolding by Proton NMR.
Long-Lived States to Monitor Protein Unfolding by Proton NMR.
Chemphyschem. 2011 Aug 31;
Authors: Bornet A, Ahuja P, Sarkar R, Fernandes L, Hadji S, Lee SY, Haririnia A, Fushman D, Bodenhausen G, Vasos PR
Abstract
The relaxation of long-lived states (LLS) corresponds to the slow return to statistical thermal equilibrium between symmetric and antisymmetric proton spin states. This process is remarkably sensitive to the presence of external spins and can be used to obtain...
Proton relaxometry of long-lived spin order
Linear Mode
