Nuclear Magnetic Resonance Dispersion

Comparison of electronic absorption spectra of the Ln-TTHA complexes in the solid state and in solution has shown that the monomeric species with Ln3+ coordination numbers 10 and 9 also occur in solution for the light and heavy lanthanides, respectively [39,41,43]. In addition, these studies suggest the presence of another species with one uncoordinated N-atom for the Nd3+ and Eu3+ systems. Absorption spectra [39,41,43],luminescence [45] and H Nuclear Magnetic Resonance Dispersion (NMRD) studies [46] have shown that oligomeric species also occur in solution, particularly below pH 5. 

The mobility of proton containing molecules in foods can be investigated by the acquisition of Nuclear Magnetic Resonance Dispersion (NMRD) profiles that report about the changes in the H-spin-lattice or longitudinal relaxation rate (Ri=l/Ti) as function of the applied magnetic field strength. 

A. Ordikhani Seyedlar, S. Stapf, C. Mattea, Dynamics of the ionic liquid l-butyl-3-methyKmidazolium bis(tri luoromethylsulphonyl)imide studied by nuclear magnetic resonance dispersion and diffusion, Phys. Chem. Chem. Phys. 17 (3) (2015) 1653-1659. 

Infrared, nuclear magnetic resonance, ultraviolet, optical rotary dispersion and circular dichroism measurements have been used for the spectral analysis of thiiranes. A few steroidal thiiranes have been reported to possess infrared absorption in the range from 580 to 700 cm The intermediate thiocyanate derivatives (RSCN) have a strong sharp peak at 2130-2160 cm the isomeric isothiocyanate (RNCS) shows a much stronger but broad band at 2040-2180 cm. ... 

U.Tallarek, E. Bayer, G. Guiochon 1998, (Study of dispersion in packed chromatographic columns by pulsed field gradient nuclear magnetic resonance), J. Am. Chem. Soc. 120, 1494. 

Structural investigations into the degree of branching and into the position and nature of glycosidic bonds and of non-carbohydrate residues in polysaccharides may include periodate oxidation and other procedures such as exhaustive methylation. X-ray diffraction and spectroscopic techniques such as nuclear magnetic resonance and optical rotatory dispersion also give valuable information especially relating to the three-dimensional structures of these polymers. 

A number of methods have been used for determining Kg values cation selective electrodes, pH-metric methods, conductimetry, calorimetry, temperature-jump relaxation measurements, membrane conductance measurements, nuclear magnetic resonance, optical rotatory dispersion. The results listed in Tables 7—10 have been obtained by various methods and at different ionic strengths so they may not always be strictly comparable. However, the corrections are probably small and the experimental accuracy is generally the same or very similar within a certain ligand type. 

There are many more solvent effects on spectroscopic quantities, that cannot be even briefly discussed here, and more specialized works on solvent effects should be consulted. These solvent effects include effects on the line shape and particularly line width of the nuclear magnetic resonance signals and their spin-spin coupling constants, solvent effects on electron spin resonance (ESR) spectra, on circular dichroism (CD) and optical rotatory dispersion (ORD), on vibrational line shapes in both the infrared and the UV/visible spectral ranges, among others. 

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