Investigation on the Relationship Between Carbon Cores and Fluorescence Moieties by Measurement of Fluorescence Anisotropy of CDs with Different Sizes  

作　　者：WANG Yijie WANG Lei WANG Haiyu 

机构地区：[1]State Key Laboratory of Integrated Optoelectronics,College of Electronic Science and Engineering,Jilin University,Changchun 130012,P.R.China

出　　处：《Chemical Research in Chinese Universities》2020年第5期894-900,共7页高等学校化学研究（英文版）

基　　金：Supported by the National Key Research and Development Program of China(No.2017YFB1104300);the National Natural Science Foundation of China(Nos.21473077,21773087,21603083,61590930,61435005);the China Postdoctoral Science Foundation(No.2016M590259).

摘　　要：Carbon dots(CDs)have been considered as a marvellous photoluminescence(PL)material,and their PL mechanism remains debatable.The carbon core,as an essential part of CDs,apparently plays an intricate role in the PL of CDs.However,the influence of the core on the PL and the relationsliip between the core and iluorescence moiety are still unclear.Here,we investigated the influence of carbon cores with difierent sizes on the rotational motion of fluorescence moieties to detennine the relationship between carbon cores and iluorescence moieties.CDs with dillerent size distributions were synthesized by controlling carbonization time.The core sizes and rotational correlation time(RCT)of the CD samples were measured by transmission electron microscopy(TEM)and fluores-cence anisotropy measurement,respectively.And the rotating unit radius were calculated irom the RCT.The experimental results show that the rotational motion of the fluorescence moiety is independent of the carbon core sizes and it possesses total rotational freedom.This work is helpful lor understanding the connection between the carbon core and fluorescence moiety and its influence on the PL properties of CDs.

关 键 词：Carbon dot FLUORESCENCE Anisotropy 

分 类 号：O62[理学—有机化学]