Related Experiment Video
Updated: Aug 5, 2026

Atomic Scale Structural Studies of Macromolecular Assemblies by Solid-state Nuclear Magnetic Resonance Spectroscopy
Published on: September 17, 2017
Direct 15N-13C Heteronuclear Correlation Spectroscopy Enhanced by Spin-Lock-Induced Crossing and Reversible
Danil A Markelov1,2, Alexey S Kiryutin1, Nikita V Chukanov1
1International Tomography Center, Siberian Branch of the Russian Academy of Science, Institutskaya 3A, Novosibirsk630090, Russia.
This study introduces Signal Amplification By Reversible Exchange (SABRE) hyperpolarization for enhanced Nuclear Magnetic Resonance (NMR) spectroscopy. This method significantly improves sensitivity for 15N-13C heteronuclear correlation, enabling faster, site-specific analysis of small molecules.
Area of Science:
- Nuclear Magnetic Resonance (NMR) Spectroscopy
- Hyperpolarization Techniques
- Chemical Analysis
Background:
- Conventional thermal NMR spectroscopy faces sensitivity limitations for direct observation of 15N-13C heteronuclear correlations.
- Low sensitivity hinders detailed analysis of 15N-labeled small molecules with naturally abundant 13C.
Purpose of the Study:
- To overcome sensitivity limitations in 15N-13C NMR correlation spectroscopy.
- To develop a rapid and site-resolved method for analyzing small molecules using hyperpolarization.
Main Methods:
- Utilized low-field spin-lock-induced crossing signal amplification by reversible exchange (SLIC-SABRE) hyperpolarization.
- Transferred polarization from parahydrogen to the substrate via an iridium-based complex.
- Employed tailored hyperpolarized spin order and complementary 1D/2D NMR experiments with 15N and 13C detection.
Main Results:
- Achieved site-specific 15N-13C connectivities.
- Resolved 15N-13C J-couplings and detected 13C-induced isotope shifts on 15N resonances.
- Acquired 2D 15N-13C correlation spectra for a selenadiazole derivative and metronidazole in approximately 40 minutes.
Conclusions:
- SLIC-SABRE hyperpolarization enables rapid, site-resolved heteronuclear correlation spectroscopy.
- Demonstrated the potential of this approach for sensitive analysis of 15N-labeled small molecules.
- Offers a significant advancement for structural elucidation in chemical and biological systems.
More Related Videos
09:25NMR 15N Relaxation Experiments for the Investigation of Picosecond to Nanoseconds Structural Dynamics of Proteins
Published on: November 1, 2024
11:44Spin Saturation Transfer Difference NMR (SSTD NMR): A New Tool to Obtain Kinetic Parameters of Chemical Exchange Processes
Published on: November 12, 2016
Related Concept Videos
2D NMR: Overview of Heteronuclear Correlation Techniques
2D NMR: Overview of Homonuclear Correlation Techniques
COSY90 is the standard two-dimensional (2D) COSY experiment that...
NMR Spectroscopy: Spin–Spin Coupling
2D NMR: Heteronuclear Single-Quantum Correlation Spectroscopy (HSQC)
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...
¹³C NMR: ¹H–¹³C Decoupling
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...