https://scholars.lib.ntu.edu.tw/handle/123456789/625438
標題: | Direct investigation of the reorientational dynamics of A-site cations in 2D organic-inorganic hybrid perovskite by solid-state NMR | 作者: | Lin C.-C Huang S.-J Wu P.-H Chen T.-P Huang C.-Y Wang Y.-C Chen P.-T Radeva D Petrov O Gelev V.M Sankar R Chen C.-C CHUN-WEI CHEN Yu T.-Y. |
公開日期: | 2022 | 卷: | 13 | 期: | 1 | 來源出版物: | Nature Communications | 摘要: | 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. © 2022, The Author(s). |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85126810907&doi=10.1038%2fs41467-022-29207-6&partnerID=40&md5=1c17ac00b662c4c05138df2bc0a8d924 https://scholars.lib.ntu.edu.tw/handle/123456789/625438 |
ISSN: | 20411723 | DOI: | 10.1038/s41467-022-29207-6 | SDG/關鍵字: | cation; perovskite; stable isotope; two-dimensional modeling |
顯示於: | 材料科學與工程學系 |
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