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Tuning the Circular Dichroism and Circular Polarized Luminescence Intensities of Chiral 2D Hybrid Organic–Inorganic Perovskites through Halogenation of the Organic Ions
Author(s) -
Lin JinTai,
Chen DengGao,
Yang LanSheng,
Lin TaiChun,
Liu YiHung,
Chao YuChiang,
Chou PiTai,
Chiu ChingWen
Publication year - 2021
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202107239
Subject(s) - circular dichroism , halogen , luminescence , magnetic circular dichroism , chemistry , crystallography , chlorine , ion , molecule , chirality (physics) , inorganic chemistry , materials science , organic chemistry , spectral line , alkyl , physics , optoelectronics , astronomy , chiral symmetry breaking , quantum mechanics , nambu–jona lasinio model , quark
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) 2 PbI 4 >(BrMBA) 2 PbI 4 >(IMBA) 2 PbI 4 >(MBA) 2 PbI 4 >(FMBA) 2 PbI 4 .