Synthesis and Chiroptical Properties of Chiral Lead Halide Molecular Clusters.

Authors

Sengui Liang, Jianwu Wei, Ke Xu, Dongfeng Xue, Peican Chen, Liya Zhou, Qi Pang, Jin Zhong Zhang

Published in

The journal of physical chemistry letters. Pages 2771-2777. Mar 07, 2025. Epub Mar 07, 2025.

Abstract

Chiral lead halide molecular clusters (MCs) consisting of PbBr₂, neutral achiral butylamine (BTYA), and chiral methylbenzylamine [(R/S)-MBA] with unique chiral optical properties in both the solution and solid states have been synthesized using ligand-assisted reprecipitation and depositing, separately. Ultraviolet-visible (UV-vis) electronic absorption and photoluminescence (PL) spectra show the first electronic absorption band and sharp blue emission band of the chiral MCs that peaked at 404 and 412 nm, respectively, in both solution and films. The emission asymmetry factor |g_lum| of the chiral MCs is 1.04 × 10^-3 in solution and 2.01 × 10^-3 in the film state at room temperature, indicating excellent circularly polarized luminescence (CPL) properties. This pronounced asymmetry is attributed to the chiral transfer from the chiral ligand to the BTYA-capped PbBr₂ framework due to the chiral MBA ligand coordination with Pb²⁺. The samples exhibited excellent ambient stability for over 1 month, primarily due to strong BTYA-PbBr₂ coordination. The MCs maintained their structure and CPL properties in the solid state, which is important for photonic applications.

PMID:
40053845
Bibliographic data and abstract were imported from PubMed on 08 Mar 2025.

Read full publication at:
Please sign in to see all details.

Stats

1-terrible, 9-excellent. How would you rate this publication? Sign in in to submit your rating.

Post a comment

You need to be signed in to post comments. You can sign in here.

Comments

There are no comments yet.