Dual bilinear rotations are introduced, which lead to well-defined rotations for both heteronuclear spins I and S that depend on the presence or absence of a (large) coupling between them. These are therefore an extension of conventional bilinear rotations, which cause such a spin-system-dependent rotation only for the spin I. A general derivation of the approach is given, and a quadruple-J-resolved type experiment is introduced for demonstration.

It is shown that proton long-lived states can be observed on benchtop nuclear magnetic resonance spectrometers in molecules containing short aliphatic chains. The effects of strong coupling between methylene groups can be mitigated by optimizing the amplitude and duration of the excitation pulse.

We present a framework to simulate nuclear magnetic resonance (NMR) signal enhancement experiments using parahydrogen at ultralow magnetic fields. Our approach captures the full quantum evolution of the system while reducing computational complexity for multi-spin systems through symmetry-based dimensionality reduction. This enables efficient prediction of optimal polarization transfer fields and simulation of the resulting ultralow-field NMR spectra.

We developed a free online tool that helps researchers and students analyze nuclear magnetic resonance signals and extract meaningful information about materials such as foods, plants, and soils. The platform simplifies complex data processing and removes the need for specialized software. Tests with simulated and real data show reliable results, making advanced analysis more accessible for science and education.

Magic-angle-spinning nuclear magnetic resonance (NMR) is ideal for studying protein structure and dynamics. Introducing fluorine atoms offers advantages due to the NMR properties of ¹⁹F and the absence of natural fluorine. However, the slow spin polarisation recovery of ¹⁹F causes long recycle delays between scans. We demonstrate that adding paramagnetic co-solutes to solid protein samples largely accelerates these experiments, and we identify optimal conditions for this approach.

The developed probe head, which is a combination of the bimodal resonator operating in transmission mode and the low-noise amplifier, led to at least a 2-fold improvement in the sensitivity of the electron paramagnetic resonance spectrometer independent of sample temperature. The probe head is compatible with commercial Bruker spectrometers without their modification.