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Chiral molecules induce enantiomorphic lattice helicity in chiral 0D tin bromide crystals

Chiral organic-inorganic hybrid metal halides have emerged as a promising class of materials for spin-controlled optical and optoelectronic effects and related applications. Chiral hybrid metal halides generally crystallize in non-helical space groups. Herein, we report the discovery of zero-dimensi...

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Hauptverfasser: Babu, Ramavath (VerfasserIn) , Xu, Haoyuan (VerfasserIn) , Covelo, Berta (VerfasserIn) , Pérez-Juste, Ignacio (VerfasserIn) , Heger, Julian E. (VerfasserIn) , Solhtalab, Nasrin (VerfasserIn) , Li, Zelin (VerfasserIn) , Zhong, Longfeng (VerfasserIn) , Hu, Xiaowen (VerfasserIn) , Deschler, Felix (VerfasserIn) , Müller-Buschbaum, Peter (VerfasserIn) , Jiang, Xiao-Fang (VerfasserIn) , Gómez-Graña, Sergio (VerfasserIn) , Polavarapu, Lakshminarayana (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: October 20, 2025
In: Angewandte Chemie. International edition
Year: 2025, Jahrgang: 64, Heft: 43, Pages: 1-13
ISSN:1521-3773
DOI:10.1002/anie.202510842
Online-Zugang:Resolving-System, kostenfrei, Volltext: https://doi.org/10.1002/anie.202510842
Verlag, kostenfrei, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/anie.202510842
Volltext
Verfasserangaben:Ramavath Babu, Haoyuan Xu, Berta Covelo, Ignacio Pérez-Juste, Julian E. Heger, Nasrin Solhtalab, Zelin Li, Longfeng Zhong, Xiaowen Hu, Felix Deschler, Peter Müller-Buschbaum, Xiao-Fang Jiang, Sergio Gómez-Graña, and Lakshminarayana Polavarapu
Beschreibung
Zusammenfassung:Chiral organic-inorganic hybrid metal halides have emerged as a promising class of materials for spin-controlled optical and optoelectronic effects and related applications. Chiral hybrid metal halides generally crystallize in non-helical space groups. Herein, we report the discovery of zero-dimensional (0D) chiral (R/S-MBA)2SnBr6 (MBA: methylbenzylammonium cation) single crystals with enantiomorphic lattice helicity. The S-enantiomer of the chiral molecule induces right-handed helicity with the P61 space group (right-handed, P-helix), while the R-enantiomer induces right-handed helicity with the P65 space group (left-handed, M-helix). The chiral molecules induce the helical twist of inorganic units in the lattice through N─H···Br and C─H···π interactions. Density functional theory (DFT) calculations indicate that the strong electronic coupling between chiral molecules and SnBr62− subunits is responsible for the generation of chirality. The chiral crystals exhibit circular dicroism (CD) spectra with a high dissymmetry factor (gCD) of 3.5 × 10−2 and no Cotton effect, maintaining the same CD sign throughout the spectrum. In addition, they exhibit broadband second harmonic generation (SHG) over a broad excitation range, with a gCP-SHG up to 0.44. Furthermore, we find that the alloying of Sn with Pb leads to a change in dimensionality from 0D to non-helical 1D structures. These crystals with helical lattices and interesting CD responses are expected to open new avenues for spin-controlled applications.
Beschreibung:Online veröffentlich am: 31. August 2025
Gesehen am 10.03.2026
Beschreibung:Online Resource
ISSN:1521-3773
DOI:10.1002/anie.202510842

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