Figure 7.

Solid-state MAS NMR spectra of CsMAFA(Br,I) in bulk (blue) and prepared as thin film on glass (red). (a) Echo-detected ¹³³Cs spectra at 100 K and 12 kHz MAS (Figure 2f is the corresponding 298 K spectrum of the bulk material), (b) ¹³C CP at 100 K and 12 kHz MAS, and (c) ¹⁴N echo-detected spectra at 298 K and 20 kHz MAS (acquisition times: bulk 20 h, thin film 60 h). The isotropic signal marked “†” most likely comes from traces of DMF used during spin-coating.