| Title: | Strategy for optical data encryption and decryption using a D-A type stimuli-responsive AIE material |
| Author(s): | Hu J; Han T; Liu Y; Zhang X; Duan Y; Li Z; Han T; |
| Address: | "Department of Chemistry, Capital Normal University, Beijing 100048, China. Department of Urology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China. Beijing Key Laboratory of Radiation Advanced Materials, Beijing Research Center for Radiation Application, Beijing 100015, China. Department of Chemistry, Capital Normal University, Beijing 100048, China. Electronic address: phanw@163.com" |
| Journal Title: | Spectrochim Acta A Mol Biomol Spectrosc |
| DOI: | 10.1016/j.saa.2020.118486 |
| ISSN/ISBN: | 1873-3557 (Electronic) 1386-1425 (Linking) |
| Abstract: | "In this study, we report a new donor-acceptor (D-A) type stimuli-responsive material, (E)-4-(((9-ethyl-9H-carbazol-2-yl)methylene)amino)benzoic acid (C1), which possesses both aggregation-induced emission (AIE) and intramolecular charge transfer (ICT) natures. It glows green photoluminescence which changes into yellow color in response to mechanical stimuli, and fumigation in volatile organic compounds (VOCs) can switch the emission back to the initial state with high reversibility. In addition, the C1 film glows yellow-orange light, but turns into blue emission under continuous fumigation in ethyl acetate vapor. However the vapochromism behaves different when the C1 film is smeared: The emission of the smeared film is similar to the unsmeared but changes into cyan color after fumigation. The differences in vapochromism between smeared and unsmeared film can be easily distinguished by naked eyes. As revealed by SEM, the as-prepared film undergoes a morphology change from ill-shaped particles to microspheres in response to organic vapor, while the smeared film with scratched surface changes into dendritic patterns. According to the morphology study, the vapochromic luminescence can be ascribed to the physical adsorption of ethyl acetate vapor and the resulting change in the ICT process. In light of the unique vapochromism of C1, a new encryption-decryption technique for data recording was developed. Information can be recorded on the C1 film by mechanical writing and simultaneously concealed. It can be only accessed via fumigation in organic vapor, demonstrating a reliable steganography technology" |
| Keywords: | Aggregation-induced emission Data storage Donor-acceptor Encryption Mechanochromic Vapochromic; |
| Notes: | "PubMed-not-MEDLINEHu, Jiangting Han, Tiandong Liu, Yang Zhang, Xunxue Duan, Yuai Li, Zhongfeng Han, Tianyu eng England 2020/05/26 Spectrochim Acta A Mol Biomol Spectrosc. 2020 Oct 5; 239:118486. doi: 10.1016/j.saa.2020.118486. Epub 2020 May 14" |
