期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 61, 期 49, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202212741
关键词
Anti-Counterfeiting; Luminescence; Metal Halides; Phase Transformation
资金
- National Natural Science Foundation of China [22171040, 51961145101]
- Fundamental Research Funds for the Central Universities, China [N2105006]
This study reports two new OD organic-inorganic hybrid Sb-based halides with reversible structural phase transformation and tunable emissions. The color of emissions can be changed by dehydration and rehydration, and a glassy material with near-infrared luminescence can be formed by heat treatment.
Zero-dimensional (OD) metal halides have drawn increasing attention due to the attractive structure dependent photoluminescence (PL) properties. Here, we report two new OD organic-inorganic hybrid Sb-based halides, (MTP)(6)SbBr6Sb2Br9 center dot H2O (MTP = Methyltriphenylphosphonium, crystal 1) and (MTP)(2)SbBr5(crystal 2), featuring a reversible structural phase transformation and tunable orange and red emissions upon dehydration and rehydration of H2O molecules. Intriguingly, a subsequent heat treatment further enables the formation of glassy state (MTP)(2)SbBr5 (glass 3) with near-infrared luminescence, moreover, a sequential reverse phase transformation from glass 3 to crystal 2 and 1 is triggered by acetonitrile and water vapor stepwise. The anti-counterfeiting demo based on the tunable and reversible PL switching is finally achieved and thus the phase structure engineering in OD metal halides expands their multiple applications in optical fields.
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