加密
无定形固体
分子内力
光致变色
材料科学
氢键
计算机科学
化学
光化学
纳米技术
结晶学
分子
有机化学
计算机网络
作者
Xu‐Min Cai,Weiren Zhong,Ziwei Deng,Yuting Lin,Zhenguo Tang,Xuedan Zhang,Jianyu Zhang,Wenjin Wang,Shenlin Huang,Zheng Zhao,Ben Zhong Tang
标识
DOI:10.1016/j.cej.2023.143353
摘要
Multimodal encryption-decryption with photochromism has been proved to ensure information security with great feasibility and operability. However, most of the photochromic materials are applied in single-mode encryption-decryption and highly dependent on crystallization, requiring long manufacturing time and lacking of controllability. Hence, amorphous materials with simple preparation and bimodal encryption-decryption are of good alternates. Herein, we have succeeded in developing an aggregation-induced emission-active and photochromic ATPA-SAB with crystalline form via introduction of the propeller-like and bulky triphenylamine (TPA). Expectedly, the amorphous materials can be obtained by fast precipitation. Examining its amorphous structures, the intramolecular N‧‧‧H distances of around 4.000 Å is largely over the normal intramolecular hydrogen bond of circa 1.800 Å, impeding the intrinsic excited-state intramolecular proton transfer process (ESIPT) for the first time, hence prohibiting photochromism. This work not only provides a strategy to construct amorphous materials and inhibit ESIPT process with TPA, but also applies both crystalline and amorphous materials for bimodal encryption-decryption to upgrade information security.
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