Circularly Polarized Luminescence based on 0D Lead‐Free Antimony (III) Halide Hybrids

• Published in: Advanced optical materials 2022-08, Vol.10 (16), p.n/a
• Main Authors: Xuan, Hong‐Li, Li, Jin‐Long, Xu, Liang‐Jin, Zheng, Da‐Sheng, Chen, Zhong‐Ning
• Format: Article
• Language: English
• Subjects: Antimony; antimony (III); Cations; Chiral materials; Chlorides; circular dichroism; Circular polarization; circularly polarized luminescence; Dichroism; Emission; Enantiomers; Excitons; Information storage; lead‐free hybrids; Luminescence; Materials science; Optical properties; Optics; Photoluminescence; Pyramids; self‐trapped exciton emission
• ISSN: 2195-1071; 2195-1071
• DOI: 10.1002/adom.202200591

Chiral materials with circularly polarized luminescence (CPL) are currently attracting great attention for their wide applications in bioresponsive imaging, 3D displays, and storage of information. Herein, CPL‐active enantiomorphic hybrids (R)‐ and (S)‐C6H15Cl2NO⋅SbCl5 are obtained by self‐assembling chiral R/S‐(3‐chloro‐2‐hydroxypropyl)trimethylammonium chloride with antimony(III) chloride, giving a 0D structure with SbCl5 pyramids isolated by (3‐chloro‐2‐hydroxypropyl)trimethylammonium chloride cations. The formed enantiomers exhibit brilliant orange emission peaked at 604 nm with photoluminescence quantum yield as high as 71.2%, originating from the self‐trapped exciton emission demonstrated by photophysical characterization. Due to the existence of chiral organic cations, the enantiomers exhibit strong chiral‐optical properties with mirror‐image circular dichroism signals in ground state and obvious CPL activity with the dissymmetry factor glum of 2.5 × 10−4 and −1.6 × 10−4 for R‐type and S‐type, respectively. It should be mentioned that these are the first reported 0D hybrids with CPL‐activity. This work paves an avenue for developing eco‐friendly CPL materials with highly ‐efficient luminescence. Circularly polarized luminescence (CPL)‐sensitive enantiomorphic hybrids (R)‐ and (S)‐C6H15Cl2NO⋅SbCl5 are successfully prepared with brilliant orange emission peaked at 604 nm with photoluminescence quantum yield as high as 71.2%, caused by self‐trapped exciton emission of Sb3+. CPL activity with the dissymmetry factor glum of 2.5 × 10−4 and −1.6 × 10−4 is achieved for R‐type and S‐type, respectively.