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

Authors :
Cheng-Chieh Lin
Shing-Jong Huang
Pei-Hao Wu
Tzu-Pei Chen
Chih-Ying Huang
Ying-Chiao Wang
Po-Tuan Chen
Denitsa Radeva
Ognyan Petrov
Vladimir M. Gelev
Raman Sankar
Chia-Chun Chen
Chun-Wei Chen
Tsyr-Yan Yu
Source :
Nature Communications. 13
Publication Year :
2022
Publisher :
Springer Science and Business Media LLC, 2022.

Abstract

Limited methods are available for investigating the reorientational dynamics of A-site cations in two-dimensional organic–inorganic hybrid perovskites (2D OIHPs), which play a pivotal role in determining their physical properties. Here, we describe an approach to study the dynamics of A-site cations using solid-state NMR and stable isotope labelling. 2H NMR of 2D OIHPs incorporating methyl-d3-ammonium cations (d3-MA) reveals the existence of multiple modes of reorientational motions of MA. Rotational-echo double resonance (REDOR) NMR of 2D OIHPs incorporating 15N- and ¹³C-labeled methylammonium cations (13C,15N-MA) reflects the averaged dipolar coupling between the C and N nuclei undergoing different modes of motions. Our study reveals the interplay between the A-site cation dynamics and the structural rigidity of the organic spacers, so providing a molecular-level insight into the design of 2D OIHPs.

Details

ISSN :
20411723
Volume :
13
Database :
OpenAIRE
Journal :
Nature Communications
Accession number :
edsair.doi.dedup.....ba0793b6acb3ecc79ab2fecd3e790a14
Full Text :
https://doi.org/10.1038/s41467-022-29207-6