Lignin-derived dual-function red light carbon dots for hypochlorite detection and anti-counterfeiting  

作　　者：Yixuan Chang Fanwei Kong Zihao Zhu Ziai Wang Chunxia Chen Xiaobai Li Hongwei Ma 

机构地区：[1]Key Laboratory of Forest Plant Ecology,Ministry of Education,Engineering Research Center of Forest Bio-Preparation,College of Chemistry,Chemical Engineering and Resource Utilization,Northeast Forestry University,Harbin 150040,China [2]State Engineering Laboratory of Bio-Resource Eco-Utilization,Northeast Forestry University,Harbin 150040,China [3]Collaborative Innovation Center for Development and Utilization of Forest Resources,Harbin 150040,China

出　　处：《Frontiers of Chemical Science and Engineering》2023年第7期966-975,共10页化学科学与工程前沿（英文版）

基　　金：Yixuan Chang and Fanwei Kong contributed equally to the work.We are grateful for the financial support by the Undergraduate Training Programs for Innovations by NEFU(Grant No.202110225105);the National Natural Science Foundation of China(Grant No.51903031);Fundamental Research Funds for the Central Universities(Grant No.2572021CG05);Young Elite Scientists Sponsorship Program by CAST(Grant No.2019QNRC001);China Postdoctoral Science Foundation Funded Project(Grant Nos.2022T150102,2021M700735,2019T120249,2018M630331);Heilongjiang Postdoctoral Fund(Grant Nos.LBH-Z18010,LBH-TZ1001);the Key Program of the Natural Science Foundation of Heilongjiang Province(Grant No.ZD2021C001);the 111 Project(Grant No.B20088).

摘　　要：The efficient utilization of natural lignin,which is the main by-product of the cellulose industry,is crucial for enhancing its economic value,alleviating the environmental burden,and improving ecological security.By taking advantage of the large sp2 hybrid domain of lignin and introducing amino functional groups,new lignin-derived carbon dots(SPN-CDs)with red fluorescence were successfully synthesized.Compared with green and blue fluorescent materials,red SPN-CDs have desirable anti-interference properties of short-wave background and exhibit superior luminescence stability.The SPN-CDs obtained exhibited sensitive and distinctive visible color with fluorescence-dual responses toward hypochlorite.Considering this feature,a portable,low-cost,and sensitive fluorescence sensing paper with a low limit of detection of 0.249μmol∙L^(–1) was fabricated using the SPN-CDs for hypochlorite detection.Furthermore,a new type of visible-light and fluorescence dual-channel information encryption platform was constructed.Low-concentration hypochlorite can be employed as an accessible and efficient information encryption/decryption stimulus,as well as an information“eraser”,facilitating a safe and diversified transmission and convenient decryption of information.This work opens new avenues for high-value-added applications of lignin-based fluorescent materials.

关 键 词：alkali lignin red light carbon dots HYPOCHLORITE encryption and anti-counterfeiting 

分 类 号：O62[理学—有机化学]