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Akademický článek
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Publikováno v:
Journal of Non-Crystalline Solids. 223:200-206
High-resolution double-quantum nuclear magnetic resonance (NMR) spectroscopy in solids at a magnetic field of 11.75 T is applied to determine the structure of phosphate glasses. The connectivities between Q(n) coordination polyhedra, identified by th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::616bd21d3c564d3f397d5dfc51572fd1
https://doi.org/10.1016/s0022-3093(97)00439-0
https://doi.org/10.1016/s0022-3093(97)00439-0
Publikováno v:
Journal of the American Chemical Society. 119:3807-3810
It is demonstrated on a polycrystalline powder sample of Cd3(PO4)2, given a known single-crystal X-ray structure, that two-dimensional 31P double-quantum single-quantum MAS correlation experiments allow unique assignment of multiple 31P resonances to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ed40c94b87ab5f85e117b5bec4b507cf
https://doi.org/10.1021/ja9636808
https://doi.org/10.1021/ja9636808
Publikováno v:
Journal of Magnetic Resonance, Series A. 122:214-221
A simple broadband radiofrequency pulse sequence for the excitation of multiple-quantum coherences in the presence of fast magic-angle spinning is introduced. This sequence involves back-to-back (BABA) 90° radiofrequency pulse cycles timed to span t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::227c2c9deeac7e222db516b3148d6249
https://doi.org/10.1006/jmra.1996.0197
https://doi.org/10.1006/jmra.1996.0197
Publikováno v:
Journal of the American Chemical Society. 118:9631-9634
31P multiple-quantum solid-state NMR spectroscopy is introduced as a new approach for elucidating internuclear distances between phosphorus nuclei in phosphates. The typical shorter distance between chemically bound groups allows the determination of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::54ec66c91f017708e528e01735be6993
https://doi.org/10.1021/ja9619871
https://doi.org/10.1021/ja9619871
Publikováno v:
Solid State Nuclear Magnetic Resonance. 5:51-61
The magic-angle spinning sidebands of the satellite transition (ST, m = ± sol3 2 ↔ ± 1 2 ) for 11B nuclear magnetic resonance (11B ST spectroscopy) have been used to detect multiple boron sites in Na2O-B2O3-SiO2 glasses. The experimental details
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7237eb38c1f565a9ac5cea224e90d4b3
https://doi.org/10.1016/0926-2040(95)00048-u
https://doi.org/10.1016/0926-2040(95)00048-u
Publikováno v:
Zeitschrift für Naturforschung A. 50:837-844
The annealing history of glasses in the system (20-40) BaO-40TiO2(40-20)SiO2 has been monitored by 29Si MAS NMR and FTIR spectroscopy from the dried gel to the final glassy state. Assignment of chemical shifts to specific building units has been fa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e42eb39b050c1a2db037acf5db04c1a9
https://doi.org/10.1515/zna-1995-0908
https://doi.org/10.1515/zna-1995-0908
Publikováno v:
Zeitschrift für Naturforschung A. 50:169-176
Recently, 31P two-dimensional (2D) NMR has been proposed as a powerful tool for direct investigations of the connectivities between the Qn units in glasses, i.e. the medium-range order. In this paper, the principles of these experiments and applicati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::55f430f0585bfd4fbea6fb274abeba8f
https://doi.org/10.1515/zna-1995-2-308
https://doi.org/10.1515/zna-1995-2-308
Publikováno v:
Journal of Non-Crystalline Solids. 180:91-95
31 P two-dimensional (2D) nuclear magnetic resonance (NMR) is proposed a powerful tool for direct investigation of the connectivities between like or different Q n units in glasses or the medium-range order. The entire experiment was carried out unde
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::26f762ee6b802b34009492a0b507f85b
https://doi.org/10.1016/0022-3093(94)90402-2
https://doi.org/10.1016/0022-3093(94)90402-2