Angewandte Chemie International Edition , 58 32 , Mather , Federico Casanova , Philippe B. Progress in low-field benchtop NMR spectroscopy in chemical and biochemical analysis. Analytica Chimica Acta , , O'Leary , Richard C. Brown , Fabien Ferrage , Malcolm H. Field-cycling long-lived-state NMR of 15 N 2 spin pairs. Molecular Physics , , Elliott , Gabriele Stevanato. Chemistry — A European Journal , 25 18 , Kiryutin , Christian Bengs , Joseph T.
Hill-Cousins , Lynda J. Brown , Giuseppe Pileio , Malcolm H. Excitation of singlet—triplet coherences in pairs of nearly-equivalent spins. Physical Chemistry Chemical Physics , 21 11 , Kiryutin , Mikhail S. Panov , Alexandra V. Ivanov , Geoffrey Bodenhausen. ChemPhysChem , 20 5 , Angewandte Chemie , 9 , Angewandte Chemie International Edition , 58 9 , Kiryutin , Joseph T. Sagdeev , Alexandra V. Constant-adiabaticity radiofrequency pulses for generating long-lived singlet spin states in NMR.
The Journal of Chemical Physics , 6 , Tovar , James W. Canary , Alexej Jerschow. Singlet excitation in the intermediate magnetic equivalence regime and field-dependent study of singlet—triplet leakage. Physical Chemistry Chemical Physics , 21 5 , Chemical Science , 10 2 , Spatial encoding and spatial selection methods in high-resolution NMR spectroscopy. Relaxation of long-lived modes in NMR of deuterated methyl groups. The Journal of Chemical Physics , 5 , Rodin , Alexey S.
Using optimal control methods with constraints to generate singlet states in NMR. Dipolar relaxation mechanism of long-lived states of methyl groups. Physical Chemistry Chemical Physics , 20 35 , Accessing the long-time limit in diffusion NMR: The case of singlet assisted diffusive diffraction q -space.
Long-lived states detect interactions between small molecules and diamagnetic metal ions. Bang-bang optimal control of large spin systems: Enhancement of 13C—13C singlet-order at natural abundance. Kharkov , X. Duan , J. Canary , A. Effect of convection and B1 inhomogeneity on singlet relaxation experiments. Pyruvate cellular uptake and enzymatic conversion probed by dissolution DNP-NMR: the impact of overexpressed membrane transporters.
Magnetic Resonance in Chemistry , 55 6 , Nuclear Singlet Spin States. Singlet order conversion and parahydrogen-induced hyperpolarization of 13C nuclei in near-equivalent spin systems. Elliott , Gabriele Stevanato , Richard C. Brown , Malcolm H. Versatile magnetic resonance singlet tags compatible with biological conditions.
RSC Advances , 7 55 , Pravdivtsev , Alexey S. Spectral investigation of the noise influencing multiqubit states. Elliott , Lynda J. Long-lived nuclear spin states in rapidly rotating CH 2 D groups.
Ghosh , Nicholas N. Kuzma , Stephen J. Kadlecek , Rahim R. Magnetic Resonance in Medicine , 75 4 , Long-lived nuclear spin states in monodeuterated methyl groups. Physical Chemistry Chemical Physics , 18 27 , Probing scalar coupling differences via long-lived singlet states. Yurkovskaya , Nikita N. Exploiting adiabatically switched RF-field for manipulating spin hyperpolarization induced by para hydrogen. Kiryutin , Herbert Zimmermann , Alexandra V. Long-lived spin states as a source of contrast in magnetic resonance spectroscopy and imaging.
Lifetimes of long-lived states in inhomogeneous magnetic fields. Chemical Physics Letters , , Long-lived nuclear spin states far from magnetic equivalence. Physical Chemistry Chemical Physics , 17 8 , An improved method for the measurement of lifetimes of long-lived coherences in NMR. RSC Advances , 5 11 , Challenges in preparing, preserving and detecting para-water in bulk: overcoming proton exchange and other hurdles.
Physical Chemistry Chemical Physics , 17 40 , Chemistry - A European Journal , 20 51 , ChemMedChem , 9 11 , Angewandte Chemie , 42 , Angewandte Chemie International Edition , 53 42 , Sadet , L. Fernandes , F. Kateb , R. Balzan , P. Existing methods for accessing these long-lived states require a resolved chemical shift difference between the nuclei involved.
Here, we demonstrate a new method for accessing singlet states that works even when the nuclei are almost magnetically equivalent, such that the chemical shift difference is unresolved. We demonstrate experiments on the terminal glycine resonances of the tripeptide alanylglycylglycine AGG in aqueous solution, showing that the nuclear singlet order of this system is long-lived even when no resonant locking field is applied.
Variation of the pulse sequence parameters allows the estimation of small chemical shift differences that are normally obscured by larger J -couplings. Tayler and M. Levitt, Phys. To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page. If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given. If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given.
Read more about how to correctly acknowledge RSC content. Fetching data from CrossRef. This may take some time to load. Loading related content. Two hydrogens on the adjacent atoms will split the resonance into three peaks with an area in the ratio of , a triplet. If there are 3 hydrogens on the adjacent atoms, the resonance will be split into four peaks with an area in the ratio of , a quartet. Review Questions Predict the splitting patterns for the labeled hydrogens by drawing the peaks, represented by lines.
Drag to draw the lines. Double-click on the line the delete it. Hint: also note the height ratio of the peak and the distance between peaks.
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