Abstract
We revisited only para-hydrogen spectroscopy (OPSY) for the analysis of para-hydrogen-enhanced NMR spectra at high magnetic fields. We found that the sign of the gradients and interpulse delays are pivotal for the performance of the sequence: the variant of double-quantum filter OPSY, where the second time interval is twice as long as the first one (OPSYd-12) converts the antiphase spectrum to in-phase and efficiently suppresses the background signal in a single scan better than the other variants. OPSYd-12 strongly facilitates the analysis of para-hydrogen-derived NMR spectra in homogeneous and inhomogeneous magnetic fields. Furthermore, the net magnetization produced is essential for subsequent applications such as imaging, e.g., in a reaction chamber or in vivo.
Original language | English |
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Pages (from-to) | 8948-8956 |
Number of pages | 9 |
Journal | Journal of Physical Chemistry A |
Volume | 122 |
Issue number | 45 |
DOIs | |
Publication status | Published - 15 Nov 2018 |
Keywords
- PARAHYDROGEN INDUCED POLARIZATION
- NMR SIGNAL ENHANCEMENT
- SINGLET SPIN STATES
- PASADENA HYPERPOLARIZATION
- REVERSIBLE EXCHANGE
- COHERENT EVOLUTION
- ORDER TRANSFER
- C-13
- RESONANCE
- SABRE