Biomimetic ultrathin pepsomes for photo-controllable catalysis  

作　　者：Guiping Peng Haibao Jin Fan Liu Xiaoyan Yang Pengliang Sui Shaoliang Lin 

机构地区：[1]Shanghai Key Laboratory of Advanced 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》2022年第12期2444-2449,共6页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China(52073092,22001071,51873061);Shanghai Scientific and Technological Innovation Projects(19JC1411700,18JC1410802)。

摘　　要：Artificial vesicles for mimicking the unique structures and functions of natural organelles represent a promising scientific object in biomimicry.However,the development of the stimuli-responsive and ultrathin vesicles assembled from sequence-defined biomimetic polymers for controllable applications is still a significant challenge.Herein,we report the self-assembly of azobenzene-based amphiphilic alternating peptoids to generate photo-responsive and ultrathin peptoid vesicle(pepsomes)with an average diameter of∼180 nm.Both cryo-transmission electron microscopy(TEM)and dissipative particle dynamics simulation proved that the vesicular membrane was the ultrathin bilayer structure around∼1.6 nm.The photo-responsive ability of pepsomes was demonstrated by the reversible size changes upon the alternative irradiation with ultraviolet(UV)and visible lights,which was attributable to the photoisomerization virtue of azobenzene moiety.As a proof-of-concept,the photo-controllable catalytic action of gold nanoparticles-decorated pepsomes was evaluated toward the borohydride-mediated reduction from 4-nitrophenol to 4-aminophenol.Photo-controllable reversible and recyclable catalytic activity was effectively modulated using the alternative irradiation with UV and visible lights for five cycles.Our work provides a simple strategy to prepare stimuli-responsive and ultrathin vesicles for potential application on nanocatalysis.

关 键 词：PEPTOID self-assembly ultrathin pepsomes photo-responsive ability photo-controllable catalysis 

分 类 号：O643.36[理学—物理化学] O644.1[理学—化学]