119Sn Solid-State NMR of Tin Sulfides. Evidence of Polytypism in SnS2

Multinuclear (67Zn, 119Sn and 65Cu) NMR spectroscopy – an ideal technique to probe the cationic ordering in Cu2ZnSnS4 photovoltaic materials

“…At this stage, PXRD and energy dispersive X-ray spectroscopy (EDX) analyses were carried out again which confirm that the thermal treatment did not affect the purity and composition of the samples (see ESI † section for values and details). No NMR signals assigned to SnS, SnS 2 , Sn 2 S 3 , ZnS or extra copper-phase 22,23 are detected, corroborating the high purity of the prepared samples. A deeper discussion about the secondary phases NMR signals is given in the ESI.…”

Local Structure and Dynamics in Methylammonium, Formamidinium, and Cesium Tin(II) Mixed-Halide Perovskites from 119Sn Solid-State NMR

“…All three isotopes have spin I = 1/2 and similar gyromagnetic ratios, which render 119 Sn the most receptive of the three, with a receptivity ca. 27 times that of 13 C. Solid-state tin NMR has been widely employed to study organotin compounds, crystalline oxides and stannates, , porous networks, − sulfides, , nitrides, and all-inorganic semiconductors. − Tin NMR is particularly sensitive to the difference between the +2 , and +4 oxidation states with the corresponding chemical shift differences on the order of several hundreds of ppm, as well as to the type of atom covalently bound to the tin site. 119 Sn chemical shifts span the range between 1000 and −2000 ppm for diamagnetic compounds and 7000–8000 ppm for tin metal .…”

Time resolved spectroscopic NMR imaging using hyperpolarized 129Xe

“…Due to the low signal-to-noise ratio of NMR from Xe in thermodynamic equilibrium, the acquisition of a single NMR spectrum in materials is usually very time consuming, taking 10 min up to tens of hours. NMR with hyperpolarized Xe has overcome this problem and therefore the number of applications in material sciences and medicine has increased significantly in the recent years [1][2][3][4][5][6][7][8]. The large nuclear magnetization of hyperpolarized Xe allows the repetitive application of excitation pulses with very small flip angles, slowly consuming the non-equilibrium magnetization and therefore eliminating the need of T 1 -waiting periods between successive measurements.…”