Tuning the Circular Dichroism and Circular Polarized Luminescence Intensities of Chiral 2D Hybrid Organic–Inorganic Perovskites through Halogenation of the Organic Ions

Jin Tai Lin, Deng Gao Chen, Lan Sheng Yang, Tai Chun Lin, Yi Hung Liu, Yu Chiang Chao*, Pi Tai Chou*, Ching Wen Chiu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

77 Citations (Scopus)

Abstract

Through the incorporation of various halogen-substituted chiral organic cations, the effects of chiral molecules on the chiroptical properties of hybrid organic–inorganic perovskites (HOIPs) are investigated. Among them, the HOIP having a Cl-substituted chiral cation exhibits the highest circular dichroism (CD) and circular polarized luminescence (CPL) intensities, indicating the existence of the largest rotatory strength, whereas the F-substituted HIOP shows the weakest intensities. The observed modulation can be correlated to the varied magnetic transition dipole of HOIPs, which is sensitive to the d-spacing between inorganic layers and the halogen–halogen interaction between organic cations and the inorganic sheets. These counteracting effects meet the optimal CD and CPL intensity with chlorine substitution, rendering the rotatory strength of HOIPs arranged in the order of (ClMBA)2PbI4>(BrMBA)2PbI4>(IMBA)2PbI4>(MBA)2PbI4>(FMBA)2PbI4.

Original languageEnglish
Pages (from-to)21434-21440
Number of pages7
JournalAngewandte Chemie - International Edition
Volume60
Issue number39
DOIs
Publication statusPublished - 2021 Sept 20

Keywords

  • chirality
  • circular dichroism
  • circular polarized luminescence
  • perovskites
  • rotatory strength

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry

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