Azobenzene-based ultrathin peptoid nanoribbons for the potential on highly efficient artificial light-harvesting  

作　　者：Zichao Sun Lingrong Zhu Jingze Liu Fan Liu Pengchao Wu Pengliang Sui Haibao Jin Shaoliang Lin 

机构地区：[1]Shanghai Key Laboratory of Advance Polymeric Materials,Frontiers Science Center for Materiobiology and Dynamic Chemistry,School of Materials Science and Engineering,East China University of Science and Technology,Shanghai 200237,China

出　　处：《Science China Chemistry》2024年第5期1680-1686,共7页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China (22001071, 52373114, 52073092, 52325308);Shanghai Scientific and Technological Innovation Project(19JC1411700)。

摘　　要：The development of artificial light-harvesting systems based on long-range ordered ultrathin organic nanomaterials(i.e., below3 nm), which were assembled from stimuli-responsive sequence-controlled biomimetic polymers, remains challenging. Herein,we report the self-assembly of azobenzene-containing amphiphilic ternary alternating peptoids to construct photo-responsive ultrathin peptoids nanoribbons(UTPNRs) with a thickness of ~2.3 nm and the length in several micrometers. The pendants hydrophobic conjugate stacking mechanism explained the formation of one-dimensional ultrathin nanostructures, whose thickness was highly dependent on the length of side groups. The photo-isomerization of azobenzene moiety endowed the aggregates with a reversible morphology transformation from UTPNRs to spherical micelles(46.5 nm), upon the alternative irradiation with ultraviolet and visible light. Donor of 4-(2-hydroxyethylamino)-7-nitro-2,1,3-benzoxadiazole(NBD) and acceptor of rhodamine B(RB) were introduced onto the hydrophobic and hydrophilic regions, respectively, to generate photocontrollable artificial light-harvesting systems. Compared with the spheres-based systems, the obtained NBD-UTPNRs@RB composite proved a higher energy transfer efficiency(90.6%) and a lower requirement of RB acceptors in water. A proof-ofconcept use as fluorescent writable ink demonstrated the potential of UTPNRs on information encryption.

关 键 词：azobenzene-based peptoid ultrathin nanoribbon PHOTO-RESPONSIVE LIGHT-HARVESTING information encryption 

分 类 号：TB383.1[一般工业技术—材料科学与工程] O641.3[理学—物理化学]