The Chemistry From Tin Iodide Molecular Inks to FASnI<sub>3</sub> Nanocrystals.

Coupling these observations with 119 Sn NMR, we observed a clear trend: a broad peak at −57 ppm (n = 1, FWHM: 1100 Hz) for one equivalent of R‐NH 2 , which upon increasing equivalents evolves into sharper peaks ranging from ‐200 ppm (n = 2, FWHM: 134 Hz) to −327 ppm (n = 10, FWHM: 100 Hz), making it obvious that the adducts formed with n = 1 are distinct from the n ≥ 2 (Figure 1d ) [ 28 ].

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