A presaturation pulse sequence has been used to observe exchangeable hydrogen atoms by 1H FT NMR in H2O. It is shown that by varying the length of the presaturation pulse, the peak areas, the spin-lattice relaxation times, and the rates of exchange of these hydrogens may be determined, ...
have made great potential in photocatalytic CO2conversion, a frontier in the study of structure-property correlations constructed on the atomic level23,24,25,26,27. However, the difficulty to accurately control the structure of the framework material with dual active sites in the...
A modification to the recently proposed α/β-HN(CO)CA-J TROSY pulse sequence (P. Permi et al., J. Magn. Reson.146, 255–259 (2000)) makes it possible to determine 3J(Hαi, Ni+1) coupling constants from a single E.COSY-type cross-peak pattern rather than from two 1Hα spin-st...
Thermal analysis in combination with XRD and SEM, revealed that in the CaO-Al 2 O 3 -SiO 2 -H 2 O system the amount of hydrogarnet formed was the largest when gibbsite was used as the Al source, smallest for kaolin and intermediate for metakaolin. The endotherm peak temperature of the ...
CERIC SULFATE HYDRATE (CAS 123333-60-8, CeH2O9S2), is a white crystalline solid, widely used in analytical chemistry and as a catalyst in various chemical reactions, with excellent oxidizing properties. It plays a crucial role in redox reactions, organic synthesis, and water treatment ...
In contrast, for samples of DG and TCG, there are only "adsorbed water" and "macro-capillary water" peaks; the "bulk water" peak is negligible. The subbituminous coal TCG and high volatile bituminous coal DG contain no significant bulk water as a result of poor development of cleats to ...
which are usually pyrope-almandine solid solutions with a minor grossular content. A second hypothesis is that the absorption is related to an andradite (CaFe3+) component in garnet (Amthauer and Rossman1998; Geiger and Rossman2020), which shows a single peak at 3565 cm−1. The microprobe...
We present a 17O and 1H NMR study of molecular endofullerene H2O@C60 dissolved in the nematic liquid crystal N-(4-methoxybenzylidene)-4-butylaniline (MBBA). The 17O NMR peak is split into five components by the 17O residual quadrupolar coupling, each of which is split into a triplet by...
Quantitatively, the molar fraction of the carbamate was obtained by integration of the relevant peak areas in the 1H NMR spectra while the molar fractions of free MEA and MEAH+ were determined according to the MEAH+ dissociation constant and pH value of the solution. Furthermore, as the CO2...
in both spectra which are well correlated to the respective bands in reference spectra of amorphous spectrum of the dark region shows a double peak at a8n9d6 ccmry−st1a, lalninde9H202C cOm3−(1r(ehf.ig1h3l)i.gIhttiesdnwotiethwotwrtohydatshhaetdthleinIeRs qiHrneu2fFeeOWnrig)...