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Cation dynamics by (1)H and (13)C MAS NMR in hybrid organic–inorganic (CH(3)CH(2)NH(3))(2)CuCl(4)

To understand the dynamics of the cation in layered perovskite-type (CH(3)CH(2)NH(3))(2)CuCl(4), the temperature-dependent chemical shifts and spin–lattice relaxation times T(1ρ) in the rotating frame have been measured using (1)H magic angle spinning nuclear magnetic resonance (MAS NMR) and (13)C c...

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Detalles Bibliográficos
Autores principales: Lim, Ae Ran, Joo, Yong Lak
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9086738/
https://www.ncbi.nlm.nih.gov/pubmed/35548822
http://dx.doi.org/10.1039/c8ra06268d
Descripción
Sumario:To understand the dynamics of the cation in layered perovskite-type (CH(3)CH(2)NH(3))(2)CuCl(4), the temperature-dependent chemical shifts and spin–lattice relaxation times T(1ρ) in the rotating frame have been measured using (1)H magic angle spinning nuclear magnetic resonance (MAS NMR) and (13)C cross-polarization (CP)/MAS NMR techniques. Each proton and carbon in the (CH(3)CH(2)NH(3))(+) cation is distinguished in MAS NMR spectra. The Bloembergen–Purcell–Pound (BPP) curves for (1)H T(1ρ) in CH(3)CH(2) and NH(3), and for the (13)C T(1ρ) in CH(3) and CH(2) are revealed to have minima at low temperatures. This implies that the curves represent the CH(3) and NH(3)(+) rotational motions. The amplitude of the cationic motion is enhanced at the C-end, that is, the N-end of the organic cation is fixed to the inorganic layer through N–H⋯Cl hydrogen bonds, and T(1ρ) becomes short with larger-amplitude molecular motions.