Crystalline-Phase-Recognition-Induced Domino Phase Transition and Luminescence Switching for Advanced Information Encryption

Zhizhuan Zhang; Yangpeng Lin; Jiance Jin; Liaokuo Gong; Yingchen Peng; Ying Song; Nannan Shen; Zeping Wang; Kezhao Du; Xiaoying Huang

doi:10.1002/anie.202110088

Crystalline-Phase-Recognition-Induced Domino Phase Transition and Luminescence Switching for Advanced Information Encryption

Angew Chem Int Ed Engl. 2021 Oct 18;60(43):23373-23379. doi: 10.1002/anie.202110088. Epub 2021 Sep 24.

Authors

Zhizhuan Zhang^{1

2}, Yangpeng Lin², Jiance Jin^{1

3}, Liaokuo Gong¹, Yingchen Peng^{1

3}, Ying Song⁴, Nannan Shen¹, Zeping Wang¹, Kezhao Du², Xiaoying Huang^{1

3}

Affiliations

¹ State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, The Chinese Academy of Sciences, Fuzhou, Fujian, 350002, P. R. China.
² College of Chemistry and Materials Science, Fujian Provincial Key Laboratory of Polymer Materials, Fujian Normal University, Fuzhou, Fujian, 350007, P. R. China.
³ University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.
⁴ College of Chemistry and Materials, Nanning Normal University, Nanning, Guangxi, 530001, P. R. China.

PMID: 34402142
DOI: 10.1002/anie.202110088

Abstract

Herein, a new mechanism, namely, crystalline phase recognition (CPR), is proposed for the single-crystal-to-single-crystal (SCSC) transition of metal halides. Chiral β-[Bmmim]₂ SbCl₅ (Bmmim=1-butyl-2,3-methylimidazolium) can recognize achiral α-[Bmmim]₂ SbCl₅ on the basis of a key-lock feature through intercontact of their single crystals, resulting in a domino phase transition (DPT). The concomitant photoluminescence (PL) switching enables observation of the DPT in situ. The liquid eutectic interface, stress-strain transfer, and feasible thermodynamics are key issues for the CPR. DFT calculations and PL measurements revealed that the optical absorption and emission of the isomers mainly originate from [SbCl₅ ]^2- anions. The structural effects (e.g., supramolecular interactions and [SbCl₅ ]^2- distortion) on the optical emission are clarified. As a novel type of stimuli response, the CPR-induced DPT and luminescence switching exhibit potential for application in advanced time-resolved information encryption.

Keywords: domino phase transitions; encryption; molecular recognition; photoluminescence switching; reversible structural transformations.

Abstract

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