文献类型：期刊文献

英文题名：Chiral Azobenzene-Based Ultrathin Peptoidoplatelets Enabling Circularly Polarized Luminescence Switches for Multilevel Information Encryption

作者：Liu, Fan[1];Cao, Yuanyuan[2];Wu, Pengchao[1];Zhang, Dongxin[1];Xu, Zejiang[1];Li, Yongsheng[2];Zheng, Yongli[3];Zhou, Yongfeng[3];Jin, Haibao[1];Lin, Shaoliang[1]

机构：[1]East China Univ Sci & Technol, Frontiers Sci Ctr Materiobiol & Dynam Chem, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Shanghai, Peoples R China;[2]East China Univ Sci & Technol, Frontiers Sci Ctr Materiobiol & Dynam Chem, Shanghai Engn Res Ctr Hierarch Nanomat,Minist Educ, Sch Mat Sci & Engn,Lab Low Dimens Mat Chem,Key Lab, Shanghai, Peoples R China;[3]Shanghai Jiao Tong Univ, Frontiers Sci Ctr Transformat Mol, Sch Chem & Chem Engn, State Key Lab Met Matrix Composites, Shanghai, Peoples R China

年份：2026

卷号：36

期号：33

外文期刊名：ADVANCED FUNCTIONAL MATERIALS

收录：;EI(收录号：20260119851101);WOS:【SCI-EXPANDED(收录号:WOS:001651325600001)】；

基金：Financial support was provided by the National Natural Science Foundation of China (52325308, 22231007, 52373114, and 22472058). The authors thank the Research Center of Analysis and Test of East China University of Science and Technology for the help with the UPLC-MS characterization.

语种：英文

外文关键词：amphiphilic alternating chiral azopeptoids; chiral self-assembly; chiroptical encryption; photo-controllable circularly polarized luminescence; photo-triggered structural transformation

摘要：Stimuli-responsive circularly polarized luminescence (CPL)-active materials are critical for advanced security systems due to their unique chiroptical signatures in enhancing anti-counterfeiting dimensionalities. However, inefficient coupling of stimulus response to chiroptical output, together with the difficulty in achieving high dissymmetry factors (glum), poses challenges for visualized encryption applications. Herein, we established a molecular engineering paradigm for dynamically photo-responsive chiroptical materials through the self-assembly of sequence-defined alternating amphiphilic chiral azopeptoids (S/R-AACAPs). Pendant hydrophobic conjugate stacking mechanism accounted for the successive generation of ultrathin 2D achiral peptoidoplatelets (similar to 2.3 nm). Subsequent trans-to-cis photoisomerization of azobenzenes was beneficial to trigger efficient chirality transfer and amplify, consequently driving a photo-modulated reversible structural transition to ultrathin helical nanobelts (similar to 20 nm pitch). Such light-switchable and recyclable chirality transfer induced CPL modulations after conjugation of S/R-AACAPs with fluorescein fluorophore. Notably, encapsulation of these chiral aggregates into a hydrogel matrix dramatically rose the glum value to 0.1 (two-orders-of-magnitude larger than the relative aqueous solution) due to the chirality coupling and imprinting effects, conveying multilevel encryption information with spatially resolved cryptographic patterns. This sequence-defined peptoids engineering synergistically fuses light-responsivity with supramolecular chirality transfer and CPL optical property, opening prospective avenues for responsive photonic devices and adaptive security platforms.