Tan Guang-Hsun, Lin Hao-Cheng, Liang Hao-Chi, Pao Chih-Wen, Chen Po-Yu, Chuang Wei-Tsung, Hsieh Chung-An, Dorrah Dalia M, Li Ming-Chia, Chen Li-Yin, Chou Ho-Hsiu, Lin Hao-Wu
Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan.
Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan.
ACS Appl Mater Interfaces. 2024 Oct 3;16(41):55842-51. doi: 10.1021/acsami.4c09396.
While luminescent stimuli-responsive materials (LSRMs) have become one of the most sought-after materials owing to their potential in optoelectronic applications, the use of earth-scarce lanthanides remains a crucial problem to be solved for further development. In this work, two manganese-based LSRMs, ()-(+)-1-phenylethylammonium manganese bromide, (R-PEA)MnBr, and ()-(-)-1-phenylethylammonium manganese bromide, (S-PEA)MnBr, are successfully demonstrated. Both (R-PEA)MnBr and (S-PEA)MnBr show a kinetically stable red-emissive amorphous state and a thermodynamically stable green-emissive crystalline state at room temperature, where the fully reversible transition can be done through melt-quenching and annealing processes. Based on this property, a reusable manganese-halide-based time-temperature indicator is demonstrated for the first time. Furthermore, an X-ray scintillator with a low limit of detection (18.1 nGy/s) and a high spatial resolution limit (30.0 lp/mm) are achieved by exploiting the high transparency of amorphous states. These results uncover the multifunctionality of manganese halides and pave the way for upcoming research.
虽然发光刺激响应材料（LSRMs）因其在光电应用中的潜力已成为最受追捧的材料之一，但对于其进一步发展而言，使用地球上稀缺的镧系元素仍然是一个亟待解决的关键问题。在这项工作中，成功展示了两种基于锰的发光刺激响应材料，（）-（+）-1-苯乙铵锰溴化物，（R-PEA）MnBr，以及（）-（-）-1-苯乙铵锰溴化物，（S-PEA）MnBr。（R-PEA）MnBr和（S-PEA）MnBr在室温下均呈现动力学稳定的红色发光非晶态和热力学稳定的绿色发光晶态，其中完全可逆的转变可通过熔融淬火和退火过程实现。基于这一特性，首次展示了一种基于锰卤化物的可重复使用的时间温度指示器。此外，通过利用非晶态的高透明度，实现了一种具有低检测限（18.1 nGy/s）和高空间分辨率极限（30.0 lp/mm）的X射线闪烁体。这些结果揭示了锰卤化物的多功能性，并为未来的研究铺平了道路。
