Double quantum (DQ) analogs of rotary echo due to magnetic dipolar interaction have been observed in a multi-level NMR system of 27 Al nuclei in Al 2 O 3 . Observations of the phenomena have been made with the aid of a simple digital filter which was designed for removing large wiggles superposed on the signals of DQ transient nutation and DQ rotary echo.

Journal of the Physical Society of JapanApr 15, 19872 citations

Journal of Magnetic Resonance (1969)

NMR double quantum transitions: An alternative derivation

Bo Gestblom

Published Sep 1, 1970• 6 citations

Publisher

DOI: 10.1016/0022-2364(70)90055-7

Related papers

Double Quantum NMR in Solids

晃宇都宮

岡山理科大学紀要Jan 1, 19780 citations

An alternative formalism for two-dimensional NMR

Jean‐Philippe Grivet

Journal of Magnetic Resonance (1969)Apr 1, 19855 citations

Spinor Double-Quantum Excitation in the Solution NMR of Near-Equivalent Spin-1/2 Pairs

Urvashi D. Heramun, Mohamed Sabba, Dolnapa Yamano +5 more

A family of double-quantum excitation schemes is described for the solution nuclear magnetic resonance (NMR) of near-equivalent spin-1/2 pairs. These new methods exploit the spinor behaviour of 2-level systems, whose signature is the change of sign of a quantum state upon a $2π$ rotation. The spinor behaviour is used to manipulate the phases of single-quantum coherences, in order to prepare a double-quantum precursor state which is rapidly converted into double-quantum coherence by a straightforward $π/2$ rotation. One set of spinor-based methods exploits symmetry-based pulse sequences, while the other set exploits SLIC (spin-lock-induced crossing), in which the nutation frequency under a resonant radiofrequency field is matched to the spin-spin coupling. A variant of SLIC is introduced which is well-compensated for deviations in the radiofrequency field amplitude. The methods are demonstrated by performing double-quantum-filtered $^{19}$ F NMR on a molecular system containing a pair of diastereotopic $^{19}$ F nuclei. The new methods are compared with existing techniques.A family of double-quantum excitation schemes is described for the solution nuclear magnetic resonance (NMR) of near-equivalent spin-1/2 pairs. These new methods exploit the spinor behaviour of 2-level systems, whose signature is the change of sign of a quantum state upon a $2π$ rotation. The spinor behaviour is used to manipulate the phases of single-quantum coherences, in order to prepare a double-quantum precursor state which is rapidly converted into double-quantum coherence by a straightforward $π/2$ rotation. One set of spinor-based methods exploits symmetry-based pulse sequences, while the other set exploits SLIC (spin-lock-induced crossing), in which the nutation frequency under a resonant radiofrequency field is matched to the spin-spin coupling. A variant of SLIC is introduced which is well-compensated for deviations in the radiofrequency field amplitude. The methods are demonstrated by performing double-quantum-filtered $^{19}$F NMR on a molecular system containing a pair of diastereotopic $^{19}$F nuclei. The new methods are compared with existing techniques.

quant-pharXiv:2602.08157Feb 10, 2026

Quantum Correlations in NMR Systems

T. S. Mahesh, C. S. Sudheer Kumar, Udaysinh T. Bhosale

arXiv:1608.06579Quantum science and technologyJan 1, 20172 citations

NMR Contributions to the Study of Quantum Correlations

Isabela A. Silva, Jefferson Gonçalves Filgueiras, R. Auccaise +7 more

arXiv:1612.02488Quantum science and technologyJan 1, 20173 citations

Double Quantum Rotary Echoes Due to Magnetic Dipolar Interaction in a Multi-Level NMR System

Hiroshi Hatanaka, Noriyuki Tabuchi

Journal of the Physical Society of JapanApr 15, 19872 citations

2π

rotation. The spinor behaviour is used to manipulate the phases of single-quantum coherences, in order to prepare a double-quantum precursor state which is rapidly converted into double-quantum coherence by a straightforward

π/2

rotation. One set of spinor-based methods exploits symmetry-based pulse sequences, while the other set exploits SLIC (spin-lock-induced crossing), in which the nutation frequency under a resonant radiofrequency field is matched to the spin-spin coupling. A variant of SLIC is introduced which is well-compensated for deviations in the radiofrequency field amplitude. The methods are demonstrated by performing double-quantum-filtered

^{19}

F NMR on a molecular system containing a pair of diastereotopic

^{19}

F nuclei. The new methods are compared with existing techniques.