Bright Circularly Polarized Mechanoluminescence from 0D Hybrid Manganese Halides

Author:

He Xin1,Zheng Yuantian2,Luo Zhishan1,Wei Yi1,Liu Yulian1,Xie Chenlong1,Li Chen1,Peng Dengfeng2ORCID,Quan Zewei1ORCID

Affiliation:

1. Department of Chemistry and Academy for Advanced Interdisciplinary Studies Southern University of Science and Technology (SUSTech) Shenzhen Guangdong 518055 China

2. Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen Guangdong 518060 China

Abstract

AbstractHybrid metal halides (HMHs) with efficient circularly polarized luminescence (CPL) have application prospects in many fields, due to their abundant host–guest structures and high photoluminescence quantum yield (PLQY). However, CPLs in HMHs are predominantly excited by light or electricity, limiting their use in multivariate environments. It is necessary to explore a novel excitation method to extend the application of chiral HMHs as smart stimuli‐responsive optical materials. In this work, an enantiomeric pair of 0D hybrid manganese bromides, [H2(2R,4R)‐(+)/(2S,4S)‐(−)‐2,4‐bis(diphenylphosphino)pentane]MnBr4 [(R/S)‐1] is presented, which exhibits efficient CPL emissions with near‐unity PLQYs and high dissymmetry factors of ± 2.0 × 10−3. Notably, (R/S)‐1 compounds exhibit unprecedented and bright circularly polarized mechanoluminescence (CPML) emissions under mechanical stimulation. Moreover, (R/S)‐1 possess high mechanical force sensitivities with mechanoluminescence (ML) emissions detectable under 0.1 N force stimulation. Furthermore, this ML emission exhibits an extraordinary antithermal quenching effect in the temperature range of 300–380 K, which is revealed to originate from a thermal activation energy compensation mechanism from trap levels to Mn(II) 4T1 level. Based on their intriguing optical properties, these compounds as chiral force‐responsive materials are demonstrated in multilevel confidential information encryption.

Funder

National Natural Science Foundation of China

Guangdong Science and Technology Innovation Foundation

Shenzhen Science and Technology Innovation Program

Publisher

Wiley

Subject

Mechanical Engineering,Mechanics of Materials,General Materials Science

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