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Mechanistic Insights into the Fluorescence Quenching of Rhodamine 6G by Graphene Oxide
Lu Chen,Lei Zhang,Shen-long Jiang,Qun Zhang*
Author NameAffiliationE-mail
Lu Chen Department of Chemical Physics, Hefei National Laboratory for Physical Sciences at the Microscale, Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China  
Lei Zhang Department of Chemical Physics, Hefei National Laboratory for Physical Sciences at the Microscale, Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China  
Shen-long Jiang Department of Chemical Physics, Hefei National Laboratory for Physical Sciences at the Microscale, Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China  
Qun Zhang* Department of Chemical Physics, Hefei National Laboratory for Physical Sciences at the Microscale, Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China qunzh@ustc.edu.cn 
Abstract:
The fluorescence quenching of Rhodamine 6G (R6G) by graphene oxide (GO) was interrogated by R6G fluorescence measurements using a set of controlled GO samples with varied C/O ratios as the quencher.The carbonyl groups on the GO nanosheet turned to play a dominant role in quenching the R6G fluorescence.The quenching in the static regime can be described by the "sphere of action" model.The significant absorption of the R6G fluorescence by the ground-state complex formed between R6G and GO was identified to be responsible for the static quenching.This work offers helpful insights into the fluorescence quenching mechanisms in the R6G/GO system.
Key words:  Graphene oxide  Rhodamine 6G  Fluorescence  Carbonyl group  Static quenching  Sphere of action  Ground-state complex
FundProject:This work was supported by the Ministry of Science and Technology of China (No.2016YFA0200602), the National Natural Science Foundation of China (No.21573211 and No.21633007), and the Fundamental Research Funds for the Central Universities (No.WK2340000063).
氧化石墨烯猝灭罗丹明6G荧光的机理研究
陈鹿,张雷,江申龙,张群*
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DOI:10.1063/1674-0068/31/cjcp1710196
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