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. 2024 Jan 3;14:336. doi: 10.1038/s41598-023-50595-2

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© The Author(s) 2024

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Optical properties of chiral perovskite QDs. UV–Vis absorbance (a) and circular dichroism (b) spectra of representative samples of CsPbBr₃ QDs dispersed in toluene following ligand exchange with S-4-X-PEABr (solid lines) or R-4-X-PEABr (dashed lines), with functional group X = CH₃, H, F, or Br having σ_para values in the Hammett equation as indicated in (c). Mean CD amplitudes, calculated as the peak-to-trough difference of the bisignate feature associated with the first exciton transition at ~ 429 nm, are shown in the bar plot in panel (d), with error bars representing standard deviations among samples from at least 6 different syntheses for each functional group (both R and S enantiomers are lumped together for this analysis).