Substitution of free halide ions unlocks responsive photoluminescence switching in manganese-based metal halides

Sisi Li; Kaitong Luo; Yali Zhou; Junhao Wang; Zhen Zhang; Zhao-Qing Liu; Yibo Chen

doi:10.1038/s41377-025-02161-w

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Substitution of free halide ions unlocks responsive photoluminescence switching in manganese-based metal halides

Original Articles

- Substitution of free halide ions unlocks responsive photoluminescence switching in manganese-based metal halides
- Substitution of free halide ions unlocks responsive photoluminescence switching in manganese-based metal halides
- Light: Science & Applications 2026年15卷第4期页码：1205-1214
- Affiliations：
  
  1.School of Chemistry and Chemical Engineering/Institute of Clean Energy and Materials/Key Laboratory of Guangzhou for Clean Energy and Materials, Guangzhou University, Guangzhou Higher Education Mega Center, Guangzhou, China
  2.Key Laboratory of Organic Integrated Circuits Ministry of Education & Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Tianjin University, Tianjin, China
- Author bio：
  
  Yibo Chen (chenyibo@gzhu.edu.cn)
- Funds：
- DOI：10.1038/s41377-025-02161-w
  中图分类号：
- 收稿：2025-10-03，
  
  修回：2025-12-06，
  
  录用：2025-12-07，
  
  网络首发：2026-02-05，
  
  纸质出版：2026-04-30
- Accepted：
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Sisi Li, Kaitong Luo, Yali Zhou, 等. Substitution of free halide ions unlocks responsive photoluminescence switching in manganese-based metal halides[J]. Light: Science & Applications, 2026,15(4):1205-1214.

Li, S. S. et al. Substitution of free halide ions unlocks responsive photoluminescence switching in manganese-based metal halides. Light: Science & Applications, 15, 1205-1214 (2026).
Sisi Li, Kaitong Luo, Yali Zhou, 等. Substitution of free halide ions unlocks responsive photoluminescence switching in manganese-based metal halides[J]. Light: Science & Applications, 2026,15(4):1205-1214. DOI： 10.1038/s41377-025-02161-w.

Li, S. S. et al. Substitution of free halide ions unlocks responsive photoluminescence switching in manganese-based metal halides. Light: Science & Applications, 15, 1205-1214 (2026). DOI： 10.1038/s41377-025-02161-w.

摘要

Abstract

Stimuli-responsive organic-inorganic metal halides hold great promise for emerging information-related applications. In this work

replacing the free halide ion Cl

−

with Br

−

in C

(MnCl

·H

O)X (where C

represents histamine cation

X represents free halide ions) converts the non-responsive hybrid C

(MnCl

·H

O)Cl into a stimuli-responsive C

(MnCl

·H

O)Br. The latter exhibits reversible photol

uminescence color switching between red and green upon thermal or water exposure. Extensive experimental and theoretical analyses reveal that the responsive property primarily stems from weakened hydrogen bonding surrounding H

O molecules after Br

−

substitution

which facilitates the initial escape of H

O molecules under heating. Subsequent structural reorganization and coordination transformation then induce the change in photoluminescence. Furthermore

the fabricated halide/polymer luminescent films are demonstrated to be highly applicable in multiple scenarios

such as planar temperature sensing

thermal stamping

and encryption/decryption. This study highlights the crucial yet often overlooked role of free halide ions in metal halides and offers new insights into their structure–property relationships.

关键词

Keywords

references

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