1H-15N 2D NMR data for S-allyl-L-cysteine (deoxyalliin) and for bis(S-allyl-L-cysteinate)palladium(II) complex are presented in this manuscript. Large upfield 15N NMR shift of the amine nitrogen in the spectrum of the complex when compared to the spectrum of the ligand shows clearly coordination of S-allyl-L-cysteine, in the anion form, to palladium(II) through the NH2 group.
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http://dx.doi.org/10.1016/j.saa.2005.07.039 | DOI Listing |
J Chem Phys
December 2024
International Tomography Center, Siberian Branch of the Russian Academy of Science, Novosibirsk 630090, Russia.
Signal amplification by reversible exchange (SABRE) employs the non-equilibrium spin order of parahydrogen as a source of strong nuclear magnetic resonance (NMR) signal enhancement, with the objective of increasing NMR sensitivity. In SABRE, a parahydrogen molecule and a substrate form a transient polarization transfer complex. Performed within the high magnetic field of an NMR spectrometer, SABRE enables the hyperpolarization of nuclear spins without additional polarizers.
View Article and Find Full Text PDFJ Biomol NMR
August 2024
Biological and Environmental Science & Engineering (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia.
The dynamics of the backbone and side-chains of protein are routinely studied by interpreting experimentally determined N spin relaxation rates. R(N), the longitudinal relaxation rate, reports on fast motions and encodes, together with the transverse relaxation R, structural information about the shape of the molecule and the orientation of the amide bond vectors in the internal diffusion frame. Determining error-free N longitudinal relaxation rates remains a challenge for small, disordered, and medium-sized proteins.
View Article and Find Full Text PDFMagn Reson Chem
November 2024
Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Ankara University, Ankara, Turkey.
Indazole scaffold have two interconvertible tautomeric forms. Regioselectivities were determined for N-benzylations and alkylation of some non-substituted and substituted indazoles, under basic conditions (KCO) in DMF. The ratio of regioisomers occurrence between N:N is almost equal.
View Article and Find Full Text PDFPLoS One
December 2023
Regulatory Research Division, Center for Oncology, Radiopharmaceuticals and Research, Health Canada, Ottawa, ON, Canada.
Magn Reson Chem
March 2024
Institute of Quantum Optics, University Ulm, Ulm, Germany.
Solid state NMR is widely used to study the orientation and other structural features of proteins and peptides in lipid bilayers. Using data obtained by PISEMA (Polarization Inversion Spin Exchange at Magic Angle) experiments, periodic spectral patterns arise from well-aligned α-helical molecules. Significant problems in the interpretation of PISEMA spectra may arise for systems that do not form perfectly defined secondary structures, like α-helices, or the signal pattern is disturbed by molecular motion.
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