Related Experiment Video
Updated: Jun 17, 2026

Structure and Coordination Determination of Peptide-metal Complexes Using 1D and 2D 1H NMR
Published on: December 16, 2013
Intermolecular single-quantum coherence sequences for high-resolution NMR spectra in inhomogeneous fields
Yuqing Huang1, Shuhui Cai, Xi Chen
1Department of Physics, Fujian Key Laboratory of Plasma and Magnetic Resonance, State Key Laboratory of Physical Chemistry of Solid Surface, Xiamen University, Xiamen 361005, PR China.
A novel pulse sequence using intermolecular single-quantum coherences (iSQCs) enables high-resolution NMR spectroscopy even in challenging, inhomogeneous magnetic fields. This method efficiently recovers detailed spectral information for potential in vivo applications.
Area of Science:
- Magnetic Resonance Spectroscopy
- Nuclear Magnetic Resonance (NMR)
Background:
- Magnetic field inhomogeneity significantly degrades the quality of NMR spectra.
- Existing methods struggle to obtain high-resolution NMR data in non-uniform magnetic fields.
- Intermolecular single-quantum coherences (iSQCs) offer unique properties for NMR signal generation.
Purpose of the Study:
- To develop a novel NMR pulse sequence utilizing iSQCs.
- To achieve high-resolution 2D NMR spectroscopy in inhomogeneous magnetic fields.
- To demonstrate the sequence's effectiveness for in vivo and in situ applications.
Main Methods:
- A new pulse sequence based on intermolecular single-quantum coherences (iSQCs) was designed.
- Fast 2D acquisition was employed to enhance data collection efficiency.
- The sequence was tested on biological samples (pig brain tissue, cucumber) for spatial localization.
Main Results:
- The iSQC sequence successfully obtained high-resolution NMR spectra despite severe field inhomogeneity.
- Useful spectroscopic information including chemical shifts, peak areas, and J-coupling constants was recovered.
- Effective solvent suppression was achieved even with imperfect radio-frequency pulses.
- Feasibility was demonstrated through spatially localized iSQC spectroscopy on tissue samples.
Conclusions:
- The proposed iSQC pulse sequence is a time-efficient method for high-resolution NMR spectroscopy.
- It overcomes limitations imposed by magnetic field inhomogeneity.
- This technique shows promise for in vivo and in situ NMR spectroscopy applications.
More Related Videos
10:28Measuring Interactions of Globular and Filamentous Proteins by Nuclear Magnetic Resonance Spectroscopy (NMR) and Microscale Thermophoresis (MST)
Published on: November 2, 2018
14:55Atomic Scale Structural Studies of Macromolecular Assemblies by Solid-state Nuclear Magnetic Resonance Spectroscopy
Published on: September 17, 2017
Related Concept Videos
¹H NMR: Interpreting Distorted and Overlapping Signals
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are slanted or...
2D NMR: Overview of Heteronuclear Correlation Techniques
NMR Spectrometers: Resolution and Error Correction
2D NMR: Overview of Homonuclear Correlation Techniques
COSY90 is the standard two-dimensional (2D) COSY experiment that...
2D NMR: Heteronuclear Single-Quantum Correlation Spectroscopy (HSQC)
NMR Spectroscopy: Spin–Spin Coupling