NMR Spectra of Alkali and Halogen Nuclei in Alkali and Halogen Salts

Abstract

NMR signals of 7Li, 23Na, 35C1, 39K , 79B r, 87R b and 127I have been measured in various alkali and halogen salt powders relative to well defined aqueous solutions. W ith the known shielding constants of some of these solutions the nuclear magnetic shielding constants of the alkali and chlorine nuclei in crystalline powders were evaluated in the atomic reference scale. The theoretical values of the shielding constants in alkali halides do not agree even in the order of magnitude with the experimental ones in some cases.For 23Na first-order and second-order quadrupole patterns have been observed and the quadru pole coupling constants are given.

Alkali Tin Halides: Exploring the Local Structure of A2SnX6 (A = K, Rb; X = Cl, Br, I) Compounds Using Solid-State NMR and DFT Computations

“…While the average long-range structures of A 2 SnX 6 materials are known from diffraction techniques, 36,39−44 solid-state nuclear magnetic resonance (NMR) spectroscopy, a complementary method that can be used to study local structure and dynamics, 16,33,45−56 is nearly absent from their suite of characterizations. 57 Only recently has NMR spectroscopy been used to investigate Cs 2 SnX 6 , revealing important information about octahedral lattice dynamics, 33 which is a property known to influence the optoelectronic properties of these materials. 58,59 Herein, multinuclear magnetic resonance spectroscopy is exploited to probe the atomic-level structure of A 2 SnX 6 by examining the A-and B-site cationic environments ( 119 Sn, 39 K, and 87 Rb) across the halide series.…”

“…However, it is yet to be demonstrated experimentally. While the average long-range structures of A 2 SnX 6 materials are known from diffraction techniques, ,− solid-state nuclear magnetic resonance (NMR) spectroscopy, a complementary method that can be used to study local structure and dynamics, ,,− is nearly absent from their suite of characterizations . Only recently has NMR spectroscopy been used to investigate Cs 2 SnX 6 , revealing important information about octahedral lattice dynamics, which is a property known to influence the optoelectronic properties of these materials. , …”

Multinuclear Magnetic Resonance Study of Sodium Salts in Water Solutions

“…The moderate spectral range-72 ppm and resonance frequency near that of carbon spectra provide a good opportunity for completing many valuable research projects. 23 Na spectra were firstly used for investigations of sodium cation in different solvents and its mixtures according to concentrations and temperatures [8,9]. Solvation effects, complex formation and relaxation phenomena remain the central focus for many researchers.…”