TY - JOUR

T1 - Circularly Polarized Luminescence in Chiral Antimony(III) Chloride [Sb2Cl10]4– Dimers Induced by Asymmetric Hydrogen Bonding

AU - Luo, Qiulian

AU - Li, Jing

AU - Wei, Jianwu

AU - Luo, Binbin

AU - Zhou, Liya

AU - Chen, Peican

AU - Tian, Jie

AU - Pan, Jiahong

AU - Emeline, Alexei V.

AU - Pang, Qi

N1 - PMID: 40545641

PY - 2025

Y1 - 2025

N2 - Metal halide species with multimeric anionic frameworks exhibit outstanding coordination chiralities and intriguing photophysical properties, making them highly promising for emerging photonic applications. However, their chiroptical activities remain largely unexplored to date. Herein, lead-free chiral hybrid 0D materials composed of edge-sharing [Sb2Cl10]4– dimers were synthesized via a natural cooling crystallization. The 0D chiral crystals R/S-1 [(R/S-MBA)4Sb2Cl10] show broad yellow photoluminescence stemming from self-trapped exciton states with a PL peak at 596 nm. R/S-1 exhibits strong circular dichroism (|gCD| ≈ 7 × 10–3) and efficient circularly polarized luminescence (|glum| ≈ 5 × 10–3). This is attributed to the chiral organic cations inducing inorganic sublattice chirality through asymmetric hydrogen-bonding interactions, while the inorganic lattice components adopt a helical arrangement following a 21 symmetry operation. Density functional theory calculations verify a Rashba-type band splitting for R/S-1, confirming the noncentrosymmetric structural distortion and substantial spin–orbit interaction induced by chiral organic cations. Furthermore, we applied chiral scintillators R/S-1 to achieve X-ray-driven asymmetric photopolymerization using circularly polarized emission. This study offers a pathway for the exploration and development of novel lead-free chiral metal halides.

AB - Metal halide species with multimeric anionic frameworks exhibit outstanding coordination chiralities and intriguing photophysical properties, making them highly promising for emerging photonic applications. However, their chiroptical activities remain largely unexplored to date. Herein, lead-free chiral hybrid 0D materials composed of edge-sharing [Sb2Cl10]4– dimers were synthesized via a natural cooling crystallization. The 0D chiral crystals R/S-1 [(R/S-MBA)4Sb2Cl10] show broad yellow photoluminescence stemming from self-trapped exciton states with a PL peak at 596 nm. R/S-1 exhibits strong circular dichroism (|gCD| ≈ 7 × 10–3) and efficient circularly polarized luminescence (|glum| ≈ 5 × 10–3). This is attributed to the chiral organic cations inducing inorganic sublattice chirality through asymmetric hydrogen-bonding interactions, while the inorganic lattice components adopt a helical arrangement following a 21 symmetry operation. Density functional theory calculations verify a Rashba-type band splitting for R/S-1, confirming the noncentrosymmetric structural distortion and substantial spin–orbit interaction induced by chiral organic cations. Furthermore, we applied chiral scintillators R/S-1 to achieve X-ray-driven asymmetric photopolymerization using circularly polarized emission. This study offers a pathway for the exploration and development of novel lead-free chiral metal halides.

M3 - Article

VL - 64

SP - 13134

EP - 13144

JO - Inorganic Chemistry

JF - Inorganic Chemistry

SN - 0020-1669

IS - 26

ER -