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Two-dimensional triple-quantum 23Na MAS NMR spectroscopy of sodium cations in dehydrated zeolites.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Hunger, Michael Sarv, Priit Samoson, Ago |
| Copyright Year | 1997 |
| Abstract | Two-dimensional triple-quantum (2D-3Q) 23Na MAS NMR spectroscopy has been applied for the investigation of sodium cations in dehydrated zeolites NaY, NaEMT, NaZSM-5 and NaMOR. The experiments have shown that the new 2D-3Q technique allows the determination of the isotropic chemical shifts and quadrupolar couplings of sodium cations with SOQE (second-order quadrupolar effect) parameters of up to ca. 4 MHz. In the present work, SOQE parameters of 1.0-1.2 MHz were found for sodium cations located at positions SI in the hexagonal prisms of dehydrated zeolites NaY and NaEMT. The sodium cations located in the 10-ring and 12-ring channels of dehydrated zeolites NaZSM-5 and NaMOR, respectively, are characterized by a SOQE parameter of 2.0 MHz while a value of 3.1 MHz was determined for sodium cations in the sidepockets of the channels in dehydrated NaMOR. |
| File Format | PDF HTM / HTML |
| DOI | 10.1016/S0926-2040(97)00051-9 |
| Alternate Webpage(s) | http://itc-web.itc.uni-stuttgart.de/hunger/bilder/Paper66.pdf?origin=publication_detail |
| PubMed reference number | 9477442 |
| Alternate Webpage(s) | https://doi.org/10.1016/S0926-2040%2897%2900051-9 |
| Journal | Medline |
| Volume Number | 9 |
| Issue Number | 2-4 |
| Journal | Solid state nuclear magnetic resonance |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
