The WURST (wideband uniform rate smooth truncation) and hyperbolic secant (HS) pulse elements have each been employed as pairs of inversion pulses to induce population transfer (PT) between the four energy levels in natural abundance solid-state (33)S (spin I=3/2) MAS NMR, thereby leading to a significant gain in ...

The WURST (wideband uniform rate smooth truncation) and hyperbolic secant (HS) pulse elements have each been employed as pairs of inversion pulses to induce population transfer (PT) between the four energy levels in natural abundance solid-state 33S (spin I = 3/2) MAS NMR, thereby leading to a significant gain in ...

Population transfer from the satellite transitions to the central transition in solid-state (33)S MAS NMR, employing WURST inversion pulses, has led to detection of the most complex (33)S MAS NMR spectrum observed so far. The spectrum is that of (CH(3)NH(3))(2)WS(4) and consists of three sets of overlapping ...

A strategy, involving (i) sensitivity enhancement for the central transition (CT) by population transfer (PT) employing WURST inversion pulses to the satellite transitions (STs) in natural abundance 33S MAS NMR for two different MAS frequencies (?r = 5.0 and 10.0 kHz) at 14.1 T and (ii) a 33S static QCPMG experiment at 19.6 T, has ...

A set of potassium sulfates presenting a variety of sulfur environments (K(2)SO(4), KHSO(4), K(2)S(2)O(7), and K(2)S(2)O(8)) has been studied by (33)S solid state NMR at 21 T. Low natural abundance (0.75%) and small gyromagnetic ratio of (33)S presented a serious challenge even at such a high magnetic field. Nevertheless, using the ...

Experiences obtained from recent improvements in the performance of solid-state 14N MAS NMR spectroscopy have been used in a natural abundance 33S MAS NMR investigation of the satellite transitions for this interesting spin I = 3/2 isotope. This study reports the first observation of manifolds of spinning sidebands for these ...

... C-13 SPECTRA WERE OBTAINED AT NATURAL ABUNDANCE, THE N ... OF THIS TECHNIQUE FOR DETECTING CHEMICAL INTERACTIONS IS ...

Preliminary DFT investigations into the feasibility of using (33)S solid-state NMR to study organic and biological molecules suggest that very large (33)S quadrupolar coupling constants (>40MHz) are not uncommon. We have therefore investigated the possibility of using recently developed ...

Preliminary DFT investigations into the feasibility of using 33S solid-state NMR to study organic and biological molecules suggest that very large 33S quadrupolar coupling constants (>40 MHz) are not uncommon. We have therefore investigated the possibility of using recently developed ...

Quercetin is found in many foods, as well as in seeds, nuts, flowers, barks, and leaves. It is the most abundant of the flavonoid molecules. Rutin is the sugar-containing homologue of quercetin - quercetin-3-rutinoside. Visible photoluminescence spectra of solid state quercetin and rutin are under attention in this paper. The spectra ...

Analysis of presolar grains in primitive meteorites has shown isotopic ratios largely characteristic of the conditions thought to prevail in various astrophysical environments. A possible indicator for a grain of ONe nova origin is a large {sup 33}S abundance: nucleosynthesis calculations predict as much as 150 times the solar ...