Cellulose-Based Ultralong Room-Temperature Phosphorescence Nanomaterials with Tunable Color and High Quantum Yield via Nano-Surface Confining Effect  

作　　者：Xin Zhang Chunchun Yin Jingxuan You Ruiqiao Li Jinming Zhang Yaohui Cheng Yirong Wang Jun Zhang 

机构地区：[1]CAS Key Laboratory of Engineering Plastics,CAS Research/Education Center for Excellence in Molecular Sciences,Institute of Chemistry,Chinese Academy of Sciences(CAS),Beijing,100190,China [2]University of Chinese Academy of Sciences,Beijing,100049,China

出　　处：《Research》2023年第3期565-573,共9页研究（英文）

基　　金：the National Natural Science Foundation of China(No.52173292 and U2004211);the Youth Innovation Promotion Association CAS(2018040);the National Key Research and Development Project(No.2020YFC1910303).

摘　　要：How to achieve multicolor organic room-temperature phosphorescence(RTP)is still challenging and striking.Herein,we discovered a new principle to construct eco-friendly color-tunable RTP nanomaterials based on the nano-surface confining effect.Cellulose nanocrystal(CNC)immobilized cellulose derivatives(CX)containing aromatic substituents via hydrogen-bonding interactions,which effectively inhibit the motion of cellulose chains and luminescent groups to suppress the nonradiative transitions.Meanwhile,CNC with a strong hydrogen-bonding network can isolate oxygen.CX with different aromatic substituents regulate the phosphorescent emission.After mixing CNC and CX directly,a series of polychromatic ultralong RTP nanomaterials were obtained.The RTP emission of the resultant CX@CNC can be finely adjusted through the introduction of various CX and the regulation of the CX/CNC ratio.Such a universal,facile,and effective strategy can be used to fabricate various colorful RTP materials with wide color gamut.Because of the complete biodegradability of cellulose,the multicolor phosphorescent CX@CNC nanomaterials can be used as eco-friendly security inks to fabricate disposable anticounterfeiting labels and information-storage patterns via conventional printing and writing processes.

关 键 词：BONDING SUBSTITUENT CHAINS 

分 类 号：O62[理学—有机化学]