Controlling molecular assembly on time scale:Time-dependent multicolor fluorescence for information encryption  

作　　者：Zixi Zou Jingyuan Wang Yian Sun Qian Wang Da-Hui Qu 

机构地区：[1]Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center,School of Chemistry and Molecular Engineering,East China University of Science and Technology,Shanghai 200237,China

出　　处：《Chinese Chemical Letters》2024年第7期336-340,共5页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.22220102004,22025503);Shanghai Municipal Science and Technology Major Project(No.2018SHZDZX03);the Innovation Program of Shanghai Municipal Education Commission(No.2023ZKZD40);the Fundamental Research Funds for the Central Universities;the Programme of Introducing Talents of Discipline to Universities(No.B16017);Science and Technology Commission of Shanghai Municipality(No.21JC1401700);the Starry Night Science Fund of Zhejiang University Shanghai Institute for Advanced Study(No.SN-ZJU-SIAS-006)。

摘　　要：Dynamic assembly on time scale is common in biological systems but rare for artificial materials,especially for smart luminescent materials.Programming molecular assembly in a spatio-temporal manner and resulting in white-light-including multicolor fluorescence with time-dynamic features remains challenging.Herein,controlling molecular assembly on time scale is achieved by integrating a pH-responsive motif to a transient alkaline solution which is fabricated by activators(NaOH)and deactivators(esters),leading to automatic assembly on time scale and time-dependent multicolor fluorescence changing from blue to white and yellow.The kinetics of the assembly process is dependent on the ester hydrolysis process,which can be controlled by varying ester concentrations,temperature,initial pH,stirring rate and ester structures.This dynamic fluorescent system can be further developed for intelligent fluorescent materials such as fluorescent ink,three-dimension(3D)codes and even four-dimension(4D)codes,exhibiting a promising potential for information encryption.

关 键 词：Supramolecular chemistry Multicolor fluorescence White light emission Time-dependent fluorescence Information encryption 

分 类 号：TB381[一般工业技术—材料科学与工程] O631.3[理学—高分子化学]