4.2 Article

Postsynthetic Crystalline Transformation in Two-Dimensional Perovskites via Organothiol-Based Chemistry

Journal

CCS CHEMISTRY
Volume 4, Issue 3, Pages 855-863

Publisher

CHINESE CHEMICAL SOC
DOI: 10.31635/ccschem.021.202100929

Keywords

metal halide perovskites; reduced-dimensionality; crystal transformation; organothiol; single crystal

Funding

  1. National Natural Science Foundation of China [21905316]
  2. Department of Science and Technology of Guangdong Province [2019QN01C108]
  3. Sun Yat-sen University
  4. York University [481333]
  5. Natural Sciences and Engineering Research Council (NSERC) of Canada [RGPIN-2016-06276]

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This study reports the postsynthetic crystal transformation of two-dimensional metal halide perovskites (2D MHPs) through organothiol-based reactions in solution. The swift and complete crystal interconversion of large organic cations in three types of 2D MHPs under ambient conditions has been confirmed.
The first postsynthetic solution-based crystal transformation of two-dimensional metal halide perovskites (2D MHPs) through organothiol-based reactions is reported. It is well-established that the crystal formation from a solution containing pre-designed metal ion and organic cation precursors produces well-defined 2D MHPs with various intercalating organic cations. However, few reports outlining the postsynthetic crystal transformation of 2D MHPs have appeared. Here, we report that, upon organothiol-based redox or condensation reactions, large organic cations in three types of 2D MHPs can interconvert under ambient conditions without damage to the layered inorganic framework. The swift and complete crystal interconversion has been confirmed using combined techniques including X-ray diffraction and C-13 nuclear magnetic resonance (C-13 NMR) spectroscopy. Electronic structures of the MHPs were investigated using computational chemistry. [GRAPHICS] .

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