Stimuli‐Responsive Emission from Hybrid Metal Halides

Author:

Liu Kunjie1,Liu Ke2,Hao Shiqiang3,Hou An1,Cao Jindong1,Quan Mingzhen1,Wang Yonggang24ORCID,Wolverton Christopher3ORCID,Zhao Jing1ORCID,Liu Quanlin1ORCID

Affiliation:

1. The Beijing Municipal Key Laboratory of New Energy Materials and Technologies School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 P. R. China

2. Center for High Pressure Science and Technology Advanced Research (HPSTAR) Beijing 100193 P. R. China

3. Department of Materials Science and Engineering Northwestern University Evanston IL 60208 USA

4. School of Materials Science and Engineering Peking University Beijing 100871 P. R. China

Abstract

AbstractStimuli‐responsive photoluminescent (PL) materials have attracted considerable attention in recent years owing to their potential applications in anti‐counterfeiting, information encryption, and sensing. Further investigations of the transformation mechanism and potential applications of stimulus‐responsive PL materials are considerably important. In the current study, an organic–inorganic metal halide, C9H15N3SbCl5 ([C9H13N3]2+ is a 1‐(2‐pyridyl) piperazine cation) is obtained, which exhibits a 0D structure with P‐1 space group. At room temperature, when excited by UV light, the C9H15N3SbCl5 single crystals exhibit unimodal blue light emission at 405 nm, and grinding or hydrostatic pressure induces double‐peak emissions at 405 and 650 nm. Interestingly, double‐emission samples can be restored to single‐emission samples by short annealing or storage in air for 2 weeks, and this process is reversible. Luminescence response to mechanical stimuli can also be achieved in the presence of hydrochloric acid and water. Spectral analysis and the analysis of the microstructural changes revealed that the structural modifications of the inorganic group play a pivotal role in the response to the stimulus. Finally, a composite film device based on C9H15N3SbCl5 is prepared to demonstrate the potential of these smart materials in anti‐counterfeiting and sensing applications.

Funder

National Key Research and Development Program of China

National Natural Science Foundation of China

Fundamental Research Funds for the Central Universities

Publisher

Wiley

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