What does this research mean for the field?

In 2D chiral hybrid organic-inorganic perovskites, bromide-based systems and methylbenzylamine (MBA) spacers facilitate more efficient chirality transfer to the inorganic framework compared to iodide and CHEA, resulting in higher chiroptical dissymmetry factors. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To determine how organic spacer architecture and halide substitution alter chirality transfer and chiroptical properties in two-dimensional chiral hybrid organic–inorganic perovskites.

September 5, 2026The Journal of Physical Chemistry Letters

Tuning Chiroptical Properties of Two-Dimensional Hybrid Perovskites through Organic Spacer and Halide Composition

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Authors

SGSoubhik GhoshIndian Association for the Cultivation of Science TCTanu ChoudharyM S Ramaiah University of Applied Sciences SKSimanta KunduIndian Institute of Engineering Science and Technology, Shibpur

Discussion

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Implication

Spectroscopic and computational analysis demonstrates spacer- and halide-dependent chirality transfer in two-dimensional hybrid perovskites, highlighting pathways to optimize chiroptical materials.

Key Points

To determine how organic spacer architecture and halide substitution alter chirality transfer and chiroptical properties in two-dimensional chiral hybrid organic–inorganic perovskites.
Synthesized two-dimensional chiral hybrid organic–inorganic perovskite systems pairing different organic spacers (methylbenzylamine [MBA] and 1-cyclohexylethylamine [CHEA]) with iodide or bromide halides.
Evaluated chiroptical signals and electronic transitions using circular dichroism spectroscopy alongside density functional theory calculations.
Excitonic transitions blue-shifted upon replacing MBA with CHEA and substituting iodide with bromide.
The dissymmetry factor peaked at gCD = 2.7 × 10–3 for (R/S-MBA)2PbBr4, compared to 1.6 × 10–4 for (R/S-CHEA)2PbI4.
Density functional theory showed that bromide-based networks exhibit greater lattice distortion, stronger charge transfer, and enhanced organic-to-inorganic chirality transfer compared to iodide analogues.

Cite This Study

Ghosh et al. (2026) studied this question.

synapsesocial.com/papers/6a9bd3e16b95aff0620eb1d9 https://doi.org/10.1021/acs.jpclett.6c02106

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September 5, 2026The Journal of Physical Chemistry Letters

Tuning Chiroptical Properties of Two-Dimensional Hybrid Perovskites through Organic Spacer and Halide Composition

View Full Paper

Ask AI

Bookmark

Authors

Discussion

Member takes

Implication

Spectroscopic and computational analysis demonstrates spacer- and halide-dependent chirality transfer in two-dimensional hybrid perovskites, highlighting pathways to optimize chiroptical materials.

Key Points

To determine how organic spacer architecture and halide substitution alter chirality transfer and chiroptical properties in two-dimensional chiral hybrid organic–inorganic perovskites.
Synthesized two-dimensional chiral hybrid organic–inorganic perovskite systems pairing different organic spacers (methylbenzylamine [MBA] and 1-cyclohexylethylamine [CHEA]) with iodide or bromide halides.
Evaluated chiroptical signals and electronic transitions using circular dichroism spectroscopy alongside density functional theory calculations.
Excitonic transitions blue-shifted upon replacing MBA with CHEA and substituting iodide with bromide.
The dissymmetry factor peaked at gCD = 2.7 × 10–3 for (R/S-MBA)2PbBr4, compared to 1.6 × 10–4 for (R/S-CHEA)2PbI4.
Density functional theory showed that bromide-based networks exhibit greater lattice distortion, stronger charge transfer, and enhanced organic-to-inorganic chirality transfer compared to iodide analogues.

Cite This Study

Ghosh et al. (2026) studied this question.

synapsesocial.com/papers/6a9bd3e16b95aff0620eb1d9 https://doi.org/10.1021/acs.jpclett.6c02106

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