The peaks always appear on either side of any large genuine peak at a separation equal to the spinning rate. Near TC, the linewidths rapidly changed from a Gaussian shape to a Lorentzian one. The 13C NMR chemical shifts of [NH2(CH3)2]2CuBr4 were also measured in phases I and II as...
In PXRD, a very sharp peak at approximately 7° 2θ was observed, which indicated that the material was highly crystalline (Fig. 1). TGA of NH2-MIL-125 over the temperature range, 80–100 °C, revealed the loss of methanol used as the washing solvent, and the framework decomposition of...
HydrogenstorageMg–B–N–HcompoundsKineticsDopedMg(NH2)2–2LiHsystemDoping Mg(NH2)2–2LiH by Mg2(BH4)2(NH2)2 compound exhibits enhanced hydrogen de/re-hydrogenation performance. The peak width in temperature-programmed desorption (TPD) profile for the Mg(NH2)2–2LiH–0.1Mg2(BH4)2(NH2)2 ...
3c. The peaks at about 420 and 570 cm−1 in the spectrum of LaFeO3 are related to the bending vibration of OFeO and the stretching vibration of FeO, respectively [41]. The spectra exhibit that the IR peak intensity of FeO decreases with enhancement of the CuO quantity in the CuO(x)...
The enhanced speed and sensitivity provided by MPPSIRD allow elemental compositions to be determined for ions from compounds entering the mass spectrometer as chromatographic peaks in amounts too small for FTIR and NMR to be used. Application of MPPSIRD and the PGM for solving re...
Moreover, the presence of independent SiO2 nanoparticles is ruled out by the absence of the Q3 peak in the 29Si CPMAS spectra that would appear near −100 ppm. All of the NMR data were combined to propose a chemical composition for all synthesized compounds, which is given in Table 1. ...
The synthetic NH2-Al/MCM-41 located at d(100), d(110), and d(200), showed the characteristic peak of mesoporous materials. When the concentration of the amine functional groups is 5.0 vol.% in the mixed solution, the average pore size of the NH2-Al/MCM-41 was 9.75 nm, and the ...
Finally, 1D and 2D (COSY) 1H NMR spectra were recorded, in which compound 4 shows interesting cross-peak correlations between the phenyl protons and amino protons.JiwenInstrumentationCaiInstrumentationXiaopengInstrumentationHuInstrumentationXiaolongInstrumentation...
The three-dimensional solution NMR structures of Esc(1-21) and Esc(1-21)-1c in DPC micelles were determined using the CYANA 2.1 software [45]. From NOESY spectra of Esc(1-21) and Esc(1-21)-1c in SDS and DPC micelles, NOE cross peak intensities were converted to upper bound distanc...
In situ 29Si NMR experiments proved oligomeric or endless chain-type anions, [Si 1+ nO 2+3 n(OH) 2] (2+2 n), to be formed in the melts under open-system conditions. From DTA double peak configurations at temperatures T c the thermal decomposition of the melts is shown to occur in...