Ma Wen, Qian Qingkai, Qaid Saif M H, Zhao Shuangyi, Liang Dehai, Cai Wensi, Zang Zhigang
Key Laboratory of Optoelectronic Technology & Systems (Ministry of Education), Chongqing University, Chongqing 400044, China.
Department of Physics & Astronomy, College of Sciences, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia.
Nano Lett. 2023 Oct 11;23(19):8932-8939. doi: 10.1021/acs.nanolett.3c02356. Epub 2023 Sep 19.
Hybrid metal halides with reversible transformation of structure and luminescence properties have attracted significant attention in anticounterfeiting. However, their long transition time and slow response rate may hinder the rapid identification of confidential information. Here, a one-dimensional hybrid manganese-based halide, i.e., (CHN)MnClBr·HO, is prepared and demonstrates the phenomenon of water-molecule-induced reversible photoluminescence transformation. Heating for <40 s induces a dynamic transfer of red-emissive (CHN)MnClBr·HO to green-emissive (CHN)MnClBr. In addition, the green emission can gradually revert to red emission during a cooling process in a moist environment, demonstrating excellent reversibility. It is found that the water molecule acts as an external stimulus to realize the reversible transition between red and green emission, which also exhibits remarkable stability during repeated cycles. Furthermore, with the assistance of heating and cooling, a complex digital encryption-decryption and an optical "AND" logical gate are achieved, facilitating the development of anticounterfeiting information security.
具有结构和发光特性可逆转变的杂化金属卤化物在防伪领域引起了广泛关注。然而，它们较长的转变时间和较慢的响应速率可能会阻碍机密信息的快速识别。在此，制备了一种一维杂化锰基卤化物，即(CHN)MnClBr·HO，并展示了水分子诱导的可逆光致发光转变现象。加热<40秒会导致红色发光的(CHN)MnClBr·HO动态转变为绿色发光的(CHN)MnClBr。此外，在潮湿环境中的冷却过程中，绿色发射可以逐渐恢复为红色发射，显示出优异的可逆性。研究发现，水分子作为外部刺激实现了红色和绿色发射之间的可逆转变，并且在重复循环过程中也表现出显著的稳定性。此外，在加热和冷却的辅助下，实现了复杂的数字加密-解密和光学“与”逻辑门，促进了防伪信息安全的发展。
