AI Article Synopsis
- - The study investigates the effectiveness of proton-phosphorus cross-polarization in the compound Sn(HPO)·HO, despite interference from paramagnetic impurities.
- - Key measurements include polarization constants and temperature-dependent relaxation times, which reveal how protons move within the structure without involving water molecules.
- - The research finds that these proton movements need an activation energy of about 8.7 kcal/mol and also discusses the influence of magic angle spinning (MAS) on the relaxation times.
Article Abstract
The proton-phosphorus (H-P) cross-polarization (CP) is effective in Sn(HPO)·HO despite of the presence of paramagnetic ion impurities. Polarization constants T and H T times are measured in static Sn(HPO)·HO by the kinetic variable-temperature H-P CP experiments. The temperature dependence of the H T times is interpreted in terms of proton movements in the interlayer space occurring between the phosphate groups without participation of the water molecules. The process requires an activation energy of 8.7 ± 0.7 kcal/mol. The MAS effect on the H T times is shown and discussed.
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| http://dx.doi.org/10.1016/j.ssnmr.2023.101898 | DOI Listing |
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