文献类型：期刊文献

中文题名：A facile and green strategy to obtain organic room-temperature phosphorescence from natural lignin

作者：Ruihong Liu[1];Tao Jiang[2];Dongzhi Liu[1];Xiang Ma[2]

机构：[1]School of Chemical Engineering and Technology,Collaborative Innovation Center of Chemical Science and Engineering,Tianjin Engineering Research Center of Functional Fine Chemicals,Tianjin University,Tianjin,300354,China;[2]Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center,Frontiers Science Center for Materiobiology and Dynamic Chemistry,School of Chemistry and Molecular Engineering,East China University of Science and Technology,Shanghai,200237,China

年份：2022

卷号：65

期号：6

起止页码：1100

中文期刊名：Science China Chemistry

外文期刊名：中国科学（化学英文版）

收录：CSTPCD;;Scopus;CSCD:【CSCD2021_2022】；PubMed;

基金：supported by the National Natural Science Foundation of China (21788102, 22125803, 22020102006,21871083, 22101083);Shanghai Municipal Science and Technology Major Project (2018SHZDZX03);‘Shu Guang’ Project supported by Shanghai Municipal Education Commission and Shanghai Education Development Foundation (19SG26);the Innovation Program of Shanghai Municipal Education Commission (2017-01-07-00-02 E00010);the Fundamental Research Funds for the Central Universities;the China Postdoctoral Science Foundation (2021M691009)。

语种：英文

中文关键词：room-temperature phosphorescence;color-tunable;lignin;afterglow

摘要：Seeking pure organic functional luminescent materials that are processed from green, low-cost, and sustainable resources remains a challenging but beneficial task. As an abundant natural polymer composed of crosslinked phenol ether units, lignin is a potential source of organic luminescent material because of the presence of extensive aromatic fragments. In the present work, a remarkable afterglow involving room-temperature phosphorescence(RTP) was achieved via simply embedding alkalized lignin into polyvinyl alcohol(PVA) matrix, and an ultralong luminescence lifetime of more than 160 ms was observed. More importantly, our study revealed that small fragments of hydrolyzed lignin(named LA-H) bearing extensive phenolic oxygen anions were the effective luminescent species. When embedded into a PVA matrix, LA-H showed remarkably high luminescence quantum yield and long lifetime of RTP emission compared with those of unprocessed lignin. Additionally, the various phenol oxygen anion moieties endowed LA-H with an excitation-dependent characteristic: the color-tunable RTP could be simply tuned from a maximum emission wavelength of 434–532 nm via altering the excitation wavelength. Thus, the color-tunable afterglow of emissive LA-H could be facilely obtained with a yield up to 38.4% using simple acid hydrolysis of lignin without other complex synthesis procedures. This work opens new avenues in the large-scale preparation of low-cost and sustainable pure organic RTP materials.