Citation: Lin Yang, Xia Liu, Bohan Li, Zhuo Liu, Yani Li, Canzhi Shi, Yan Xu. Emission regulation in 0D hybrid copper halides via structural transformation: From defect to non-defect states for information encryption and storage[J]. Chinese Chemical Letters, ;2026, 37(5): 110858. doi: 10.1016/j.cclet.2025.110858 shu

Emission regulation in 0D hybrid copper halides via structural transformation: From defect to non-defect states for information encryption and storage

Lin Yang ^a ,
Xia Liu ^a ,
Bohan Li ^a ,
Zhuo Liu ^a ,
Yani Li ^a ,
Canzhi Shi ^a ,
Yan Xu ^{a, b, *,}

a.
Department of Chemistry, College of Sciences, Northeastern University, Shenyang 110819, China
b.
Foshan Graduate School of Innovation, Northeastern University, Foshan 528311, China

xuyan@mail.neu.edu.cn

Received Date: 19 November 2024
Revised Date: 14 January 2025
Accepted Date: 14 January 2025
Available Online: 15 January 2025

Figures(7)

Zero-dimensional (0D) hybrid copper halides have attracted significant attention owing to their unique photophysical properties and remarkable structural diversity. In this work, two 0D self-assemblies compounds of copper iodide dimers were synthesized, namely, (4-MBTP)₂(Cu₂I₄)_0.5I (1) and (4-MBTP)(Cu₂I₄)_0.5 (2) (4-MBTP = (4-methylbenzyl)triphenylphosphonium chloride). Compound 1 exhibits blue emission centered at 474 nm, while compound 2 shows yellow emission centered at 559 nm at room temperature. The results combined with crystal structure, spectroscopy analysis, characterization, and theoretical studies reveal that the blue light of compound 1 stems from multiple defect states caused by the presence of I vacancies, while the yellow emission of compound 2 is attributed to through-space charge-transfer (TSCT) and cluster-centered (CC) excited state. Strikingly, the crystal structure can transform from compound 1 into compound 2 with luminescence color change from blue to yellow through treating with methanol. This work provides a structural transformation strategy of hybrid copper halides, as well as realizes the regulation of light emission from defect states to non-defect states, making them feasible candidates for information encryption and optical data storage.
- Zero-dimensional hybrid metal halide,
- Emission regulation,
- Structural transformation,
- Information encryption,
- Optical data storage
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