We took the NMR using deuterated H20, and the water peak at around 4.7 ppm drowns out the rest of the NMR. We have tried dissolving the compounds in typical organic solvents. However, all the solvents and even DMSO is not dissolving the compounds.1. Is there anyway I can take an NMR ...
Lowe, published in volume 41 of 'Tetrahedron Letters,' on the use of trifluoroacetic acid to minimize water problems in dimethyl sulphoxide (DMSO) nuclear magnetic resonance (NMR) spectra. Hygorscopic nature of d(sub 6)-DMSO; Water peaks produced with the addition of deuterated trifluoroacetic ...
Nuclear Magnetic Resonance (NMR) spectra (1H and 13C) 1H NMR, 13C NMR spectra were obtained at ambient temperature in DMSO-d6 or D2O on Bruker Avance III spectrometer operating at 400 MHz. Data for 1H NMR and 13C NMR are recorded as follows: chemical shift (ppm), multiplicity (s,...
The peak from the Au-Cl shell was not observed in XAFS spectra, indicating that residual Cl from the synthesis was absent on Au1/BP nanosheets. This result was also supported by the high-resolution X-ray photoelectron spectroscopy (XPS) spectrum which showed no signals for Cl (Supplementary ...
The structures of the five compounds were confirmed by FT-IR, 1H NMR, 13C NMR and high-resolution mass spectral analysis (HRMS). The cis-trans isomerization of compounds B1-3 could be judged by the FT-IR spectra that they all showed a strong peak at 950 - 1050 cm−1, which ...
Further details of the synthesis of 242 and YI-1 were described in the Additional file 1, including NMR and mass spectra results (Additional file 1: Scheme S1 and Figs. S2–S17). The loading efficiencies of PSMA NPs for 242 and YI-1 were both larger than 85% (Additional file 1: Fig...
The 1H NMR spectra of dimethyl sulfoxide (DMSO‑d6) (Fig. 1b) showed that the peaks of H9, H8, and H7 were noticeably enhanced compared to the normalized peak of H4 with increasing DS. The IECs of SPAES40, SPAES50, and SPAES60 were 1.59, 1.93, and 2.25 meq/g, respectively (...
4. As seen from the differences among peak intensities in Fig. 4, solid residues after pretreatment showed much less lignin remaining than that in the untreated poplar wood due to the enhanced lignin depolymerization. Fig. 4 Py-GC/MS results of untreated poplar wood (control) and solid ...
Solid line and dashed line show in vitro \(\bar \nu_{{\mathrm{C}} \equiv {\mathrm{N}}}\) in pure water (2242.4 cm−1) and DMSO (2234.9 cm−1), respectively. b Linear calibration curve between bound water volume percentage and the SREF peak frequency. c Intracellular map...
ionic liquid 1-allyl-3-methylimidazolium chloride (AmimCl) (Fig.2a). In1H-NMR spectra of the intermediate cellulose 2-chloropropionate (Cell-Cl) with different degrees of substitution (DSCl) (Supplementary Fig.1a), the peak at 1.5–1.7 ppm is assigned to the methyl protons. In their FTIR ...