Fig. 1: 13C NMR spectral characterisation of 2D OIHP crystals (n = 2). | Nature Communications

Fig. 1: 13C NMR spectral characterisation of 2D OIHP crystals (n = 2).

From: Direct investigation of the reorientational dynamics of A-site cations in 2D organic-inorganic hybrid perovskite by solid-state NMR

Fig. 1

a The structural models of 2D (BA)2(MA)Pb2I7 (n = 2) and 2D (PEA)2(MA)Pb2I7 (n = 2). b The 13C CPMAS spectra of 2D (BA)2(MA)Pb2I7 (n = 2) and 2D (PEA)2(MA)Pb2I7 (n = 2) synthesised with 13C,15N-MA, respectively. The spectra with ×20 magnification are shown on the top, overlayed with the spectra of the materials synthesised with natural-abundance MA. The two sets of spectra have been normalised by the height of the C1 carbon peak of BA and the aromatic carbon peak at 130.7 ppm, respectively. c 2D DCP MAS (13C,15N) correlation spectra of 2D (BA)2(13C,15N-MA)Pb2I7 (n = 2) and 2D (PEA)2(13C,15N-MA)Pb2I7 (n = 2), respectively. The 13C direct excitation MAS NMR spectra are overlayed on the top.

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